Marine LiFePO4 Lithium Batteries
Reasons to Consider CMPower Lithium Iron Phosphate (LiFePO4) Marine Batteries
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Bluetooth Battery Monitor - Built in real time monitoring of battery State-of-Charge
Longer Cycle Life - Up to 10 times longer cycle life and 5 times longer calendar life than AGM and lead acid batteries. Lighter Weight - 50% lighter than a comparable lead acid battery. Up to 4X more power per pound than lead acid batteries. Efficient charging and discharging - Up to 20% more efficient. Store 20% more generated power. Up to 4X faster charging. Superior Safety - LiFePO4 chemistry eliminates the risk of combustion due to overcharging, short circuit, high impact. No toxic chemical discharge Increased Flexibility - Modular design enables deployment of up to 4 batteries in series and up to 10 batteries in parallel. Compatibility - Built in BMS (Battery Management System) accommodates various charging profiles and protects the LFP cells. High Continuous Power Draw - 150 - 200 amp draw for those power intensive applications like bow thruster and windlass. More Usable Power - 95% usable power vs 60% or less for lead acid/AGM batteries Applications - House battery bank, trolling motor, engine start (<50hp), thrusters, windlass, electric winches, propulsion motors Removable BMS - For some applications it is great to be able to easily replace a failed BMS |
CMPower LiFePO4 135 Ah Battery
Inside a CMPower LiFePO4 Battery. Cell Case with Replaceable BMS.
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Click here for a narrated slide video titled: What You Need to Know About LiFePO4 lithium batteries.
LiFePO4 Lithium Marine Batteries - Product Summary
Custom Marine Products offers two series of CMPower batteries as follows:
1. Marine High Power Density (HPD)Series - These next generation marine batteries use the latest technology in high performance LiFePO4 cells enabling maximum power storage in minimum space. These batteries are ideal for boats with limited storage space and significant power requirements.
2. Marine Utility Series - These general purpose deep cycle marine batteries offer time tested reliability for most any marine application. With a discharge capacity of up to 200 amps continuous draw and up to 400 amps short cycle draw, these batteries will accommodate most house, engine start, windlass, electric winch and inverter battery power requirements.
1. Marine High Power Density (HPD)Series - These next generation marine batteries use the latest technology in high performance LiFePO4 cells enabling maximum power storage in minimum space. These batteries are ideal for boats with limited storage space and significant power requirements.
2. Marine Utility Series - These general purpose deep cycle marine batteries offer time tested reliability for most any marine application. With a discharge capacity of up to 200 amps continuous draw and up to 400 amps short cycle draw, these batteries will accommodate most house, engine start, windlass, electric winch and inverter battery power requirements.
CMPower Marine High Power Density (HPD) Series
We are pleased to introduce our next generation LiFePO4 marine battery series for 2023-2024.
CMPower 2.0 free app
Our marine and RV customers told us what they would like to have in the ideal LiFePO4 battery. We listened and went to work with our R & D team. Here are some of the enhancements to our already highly acclaimed battery offerings.
Our HPD Series batteries have all the features that have made our highly acclaimed CMPower batteries so popular including:
- Higher Power Density - We now pack more storage power in a smaller space. 135 Ah usable in a Group 27 size and 150 Ah usable in a Group 31 size and up to 350 Ah usable in an 8D size.
- Higher Continuous Draw - Our larger batteries with over 200 Ah capacity now boast a 200 amp continuous draw and a 600 amp short cycle draw for power high power intensive appliances.
- Enhanced Bluetooth App - Our CMPower 2.0 Bluetooth app monitors all batteries in a bank from a single screen and enables drill down status to cells within a specific battery.
- Enhanced Reliability - On select models, the BMS (Battery Management System) can be quickly and easily accessed, repaired or replaced in the field with simple tools. See removeable BMS section below.
- Enhanced Balancing - Our enhanced BMS (Battery Management System) enables optimum balancing between multiple batteries in a bank.
- Enhanced Cell Protection - The enhanced BMS has built in protection against voltage spikes, over charging, over discharging, high and low temperature protection, and short circuit protection.
Our HPD Series batteries have all the features that have made our highly acclaimed CMPower batteries so popular including:
- High performance Lithium Iron Phosphate (LiFePO) cells - Support a deep cycle discharge and exceptional power density
- Heavy duty BMS with 150 - 200 amp continuous current draw - Support most house, start, windlass, electric winch and inverter battery power requirements
- Charging system compatibility - Minimal if any modifications to existing battery charging systems required.
- Bluetooth battery monitor - Built-in comprehensive battery monitor displayed on a smartphone or tablet using our proprietary free app - CMPower 2.0
- Tough ABS case with vibration dampening - Built to withstand the harsh marine environment. Can be mounted on any axis/side.
- Up to 4 batteries in series and up to 10 in parallel - Flexibility to configure a power system to accommodate customer requirements
- Up to 4,000 charge/discharge cycles - Exceptional longevity and reliability
- 7+ Year warranty and support - Simple easy to understand and execute product warranty and exceptional customer service
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NEW for 2024
We designed a 48V battery for small electric outboard motors like the ePropulsion Spirit and Navy series that will easily fit under a dinghy seat or fit against the transom under the motor. We have tested this battery with various ePropulsion motors are impressed with the ease of installation and the hours of operation between charges. A cable can be ordered from ePropulsion to connect the CMPower battery to the unit. The CMP Bluetooth app is handy for knowing the state-of-charge, amps being used to charge or discharge, time to full charge or discharge and much more. CMP offers an easy to use 52V shore power charger and a 12 -52V DC-DC charger. Contact CMP for more details. 248 705 8337 |
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Specifications - Marine High Power Density Series
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Our sealed batteries are waterproof and are ideal for the harsh marine environment. Both HPD series batteries use the same high output LFP cells, have the same power to weight ratio and use the same powerful Bluetooth battery monitor app. Our sealed batteries offer maximum power storage in minimum space.
For some battery applications, it is desirable to access the BMS (Battery Management System) to quickly and easily repair or replace it in the field with simple tools. The case lid of these batteries is attached with screws for easy removal and BMS access. The battery is sealed with an O-ring. The capacity of the 4D and 8D size batteries is slightly less than the sealed case batteries.
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Click on Battery to See Datasheet
Inside an HPD LiFePO4 Battery
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Store - High Power Density LiFePO4 Marine Batteries
120 Ah LiFePO4 High Power Density BatteryThis Group 24 size LiFePO4 battery stores 120 Amp Hours (1,536watts) of usable power with a 150 amp continuous discharge. It comes with bluetooth so you can monitor the battery's state of charge and discharge via your phone with the CMPower 2.0 app. It measures 10.25 x 6.7 x 8.2 inches and weighs only 29 pounds. Four of these batteries can be wired in series for a 48 volt system. Ten of these batteries can be wired in parallel to create a powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering house banks, electric winches, engine start motors, windlasses, inverters and more.
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135 Ah LiFePO4 High Power Density BatteryThis Group 27 size LiFePO4 battery stores 135 Amp Hours (1,728 watts) of usable power with a 150 amp continuous discharge. It measures 12 x 6.7 x 8.3 inches and weighs only 31 pounds. Four of these batteries can be wired in series for a 48 volt system. Ten of these batteries can be wired in parallel to create a powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering house banks, electric winches, engine start motors, windlasses, inverters and more. Comes free with bluetooth to connect to the CMPower 2.0 app on your phone so you can monitor the state of charge and other battery data.
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150 Ah LiFePO4 High Power Density BatteryThis Group 31 size LiFePO4 battery stores 150 Amp Hours (1,920 watts) of usable power with a 150 amp continuous discharge. It measures 13 x 6.8 x 8.9 inches and weighs only 33 pounds. Four of these batteries can be wired in series for a 48 volt system. Ten of these batteries can be wired in parallel to create a powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering house banks, electric winches, engine start motors, windlasses and more.
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225 Ah LiFePO4 High Power Density BatteryThis Group 4D size LiFePO4 battery stores 225 Amp Hours (2880 watts) of usable power with a 200 amp continuous discharge. It measures 19.3 x 6.7 x 9.4 inches and weighs only 45 pounds. The BMS can be easily accessed or replaced with simple tools. Four of these batteries can be wired in series for a 48 volt system. Ten of these batteries can be wired in parallel to create a powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering house banks, electric winches, engine start motors, windlasses, inverters and more.
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240 Ah LiFePO4 High Power Density BatteryThis Group 4D size LiFePO4 battery stores 240 Amp Hours (3,072 watts) of usable power with a 200 amp continuous discharge. It measures19.3 x 6.7 x 9.4 inches and weighs only 45 pounds. Four of these batteries can be wired in series for a 48 volt system. Ten of these batteries can be wired in parallel to create a powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering house banks, electric winches, engine start motors, windlasses, inverters and more.
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315 Ah LiFePO4 High Power Density BatteryThis Group 8D size LiFePO4 battery stores 315 Amp Hours (4,032 watts) of usable power with a 200 amp continuous discharge. It measures 20.7 x 11.2 x 10 inches and weighs only 58 pounds. The BMS can be easily accessed or removed with simple tools. Four of these batteries can be wired in series for a 48 volt system. Ten of these batteries can be wired in parallel to create a powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering house banks, electric winches, engine start motors, windlasses, inverters and more.
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350 Ah LiFePO4 High Power Density BatteryThis Group 8D size LiFePO4 battery stores 350 Amp Hours (4,480 watts) of usable power with a 200 amp continuous discharge. It measures 20.7 x 11.2 x 10 inches and weighs only 60 pounds. Four of these batteries can be wired in series for a 48 volt system. Ten of these batteries can be wired in parallel to create a powerful 12V house or service battery bank. This deep cycle high power density battery is ideal for powering house banks, electric winches, engine start motors, windlasses, inverters and more.
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150 AH 25.6V LiFePO4 High Power Density BatteryThis Group 8D size 25.6V LiFePO4 battery stores 150 Amp Hours (3,840 watts) of usable power with a 150 amp continuous discharge. It measures 20.7 x 11.2 x 10 inches and weighs only 80 pounds. The BMS can be easily accessed or removed with simple tools.
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Victron LiFePO4 Batteries
Contact CMP to Purchase
Victron LiFePO4 Batteries are available in two series; with an external BMS and with an internal BMS (Battery Management System)
Victron LiFePO4 Batteries are available in two series; with an external BMS and with an internal BMS (Battery Management System)
Victron Energy Lithium Battery Smart batteries are Lithium Iron Phosphate (LiFePO4) batteries and are available in 12.8 V or 25.6 V in various capacities. They can be connected in series, parallel and series/parallel so that a battery bank can be built for system voltages of 12 V, 24 V or 48 V. The maximum number of batteries in one system is 20, which results in a maximum energy storage of 84 kWh in a 12 V system and up to 102 kWh in a 24 V1) and 48 V1) system. An external BMS is required for operation of these batteries.
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Victron Smart BMS 12-200
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The SuperPack batteries are easy to install, needing no additional components. The internal switch will disconnect the battery in case of over discharge, over charge, low or high temperature.
The batteries can be connected in parallel. Series connection is not allowed. Use in upright position only.
The batteries can be connected in parallel. Series connection is not allowed. Use in upright position only.
CMPower Marine Utility Series
10% off listed price through the end of the month
Our heavy duty Marine Utility Series is designed to support most marine power requirements with a 150 amp continuous draw capacity.
Features include:
• High performance Lithium Iron Phosphate (LiFePO) cells - Support a deep cycle discharge
• Heavy duty BMS with 150 amp continuous current draw - Support most house, start, windlass, electric winch and inverter battery power requirements
• Bluetooth battery monitor - Built-in comprehensive battery monitor displayed on a Smartphone or tablet
• Tough ABS case with vibration dampening - Built to withstand the harsh marine environment
• Up to 4 batteries in series and 10 in parallel - Flexibility to configure a power system to accommodate boat requirements
• Up to 4,000 charge/discharge cycles - Exceptional longevity and reliability
Group Sizes: 80s: Group 27 (a bit smaller) 100, 120, 125: Group 31 50s w room to spare: Group 24 180, 200, 300: 8D 150: 4D
Features include:
• High performance Lithium Iron Phosphate (LiFePO) cells - Support a deep cycle discharge
• Heavy duty BMS with 150 amp continuous current draw - Support most house, start, windlass, electric winch and inverter battery power requirements
• Bluetooth battery monitor - Built-in comprehensive battery monitor displayed on a Smartphone or tablet
• Tough ABS case with vibration dampening - Built to withstand the harsh marine environment
• Up to 4 batteries in series and 10 in parallel - Flexibility to configure a power system to accommodate boat requirements
• Up to 4,000 charge/discharge cycles - Exceptional longevity and reliability
Group Sizes: 80s: Group 27 (a bit smaller) 100, 120, 125: Group 31 50s w room to spare: Group 24 180, 200, 300: 8D 150: 4D
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Click to Download Datasheet 12 Volt 10 Ah Datasheet 20 Ah Datasheet 50 Ah Datasheet 80 Ah Datasheet 100 Ah Datasheet 120 Ah Datasheet 180 Ah Datasheet 200 Ah Datasheet 300 Ah Datasheet 24 Volt 100 Ah 24V Datasheet 150 Ah 24V Datasheet 12 Volt Start 100Ah Start Datasheet |
Store - Utility Series LiFePO4 Marine Batteries
LiFePO4 Lithium Marine Battery - 10 Ah 12.8 Volt 10 amp draw BMSThis 12V 10 Ah LiFePO4 lithium battery is designed for both house and engine start marine applications. It has a built in 10 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. This battery measures 13x6.7x8.3 inches 330x170x210 mm.
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LiFePO4 Lithium Marine Battery - 20 Ah 12.8 Volt 20 amp draw BMSThis 12V 20 Ah LiFePO4 lithium battery is designed for both house and engine start marine applications. It has a built in 20 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. This battery measures 13x6.7x8.3 inches 330x170x210 mm.
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LiFePO4 Lithium Marine Battery - 50 Ah 12.8 Volt 100 amp draw BMS with Bluetooth MonitoringThis 12V 50 Ah LiFePO4 lithium battery is designed for both house and engine start marine applications. It has a built in 100 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery monitor system for monitoring the state-of-charge of the battery with a free app is included.
This battery measures 7.8 x 6.5 x 6.7 inches |
LiFePO4 Lithium Marine Battery - 100 Ah 12.8 Volt 100 amp BMS with BluetoothThis 12 V100 Ah Lithium LiFePO4 battery is designed for house marine applications to operate basic appliances. It has a built in 100 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery system for monitoring the state-of-charge of the battery with a free phone app is included.
This battery measures 13x6.7x8.3 inches 330x170x210 mm. |
Lithium Marine Battery - 100 Ah 12.8 Volt 150 amp BMS with Bluetooth Phone App MonitoringThis 12 V100 Ah LiFePO4 lithium battery is designed for both house and engine start marine applications. It has a built in 150 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery monitor system for monitoring the live state-of-charge of the battery with a free phone app is included.
This battery measures 13x6.7x8.3 inches 330x170x210mm. |
LiFePO4 Lithium Marine Battery - 120 Ah 12.8 Volt 150 amp BMS with Bluetooth MonitoringThis 12 V120 Ah LiFePO4 battery is designed for both house and engine start marine applications. It has a built in 150 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery monitor system for monitoring the state-of-charge of the battery with a free app is included.
This battery measures 13x6.7x8.3 inches 330x170x210 mm. |
LiFePO4 Marine Battery - 150 Ah 12.8 Volt 150 amp BMS with Bluetooth MonitoringThis 12 V150 Ah LiFePO4 battery is designed for both house and engine start marine and RV applications. It has a built in 150 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery monitor system for monitoring the state-of-charge of the battery with a free app is included. This battery measures 18.9x6.7x9.5 inches 480x170x240mm. |
LiFePO4 Marine Battery - 180 Ah 12.8 Volt 150 amp BMS with Bluetooth MonitoringThis 12 V180 Ah LiFePO4 battery is designed for both house and engine start marine applications. It has a built in 150 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery monitor system for monitoring the state-of-charge of the battery with a free app is included. This battery measures 18.9x6.7x9.5 inches 480x170x240mm. |
LiFePO4 Marine Battery - 200 Ah 12.8 Volt 120 amp BMS with Bluetooth MonitoringThis 12 V200 Ah LiFePO4 battery is designed for both house and trolling motor marine applications and RV. It has a built in 120 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery monitor system for monitoring the state-of-charge of the battery with a free app is included.
This battery measures 20.5x9.2x8.7 inches 521x233x220 mm, weighs 60 pounds 27 kg |
LiFePO4 Marine Starting Battery - 100 Ah 12.8 Volt 1,200 CCAThis 12 V 100 Ah 1,200 CCA LiFePO4 battery is designed for engine start marine and RV applications. It has a built in 150 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems.
This battery measures 15.7x6.9x7.4 inches 398x175x188 mm and weighs 29 pounds 13 kg. |
LiFePO4 Marine Battery - 150 Ah 25.6 Volt 120 amp BMS with BluetoothThis 24 V150 Ah LiFePO4 battery is designed for both house and engine start marine applications. It has a built in 120 amp continuous draw Battery Management System (BMS) and is plug compatible with most lead acid and AGM charging systems. A Bluetooth battery monitor system for monitoring the state-of-charge of the battery with a free app is included.
This battery measures 20.5x10.5x8.7 inches 520x267x220mm. |
Advantages and Features of CMPower LiFePO4 Lithium Marine Batteries
CMPower LiFePO4 (lithium iron phosphate) batteries use a lithium battery technology that is safe, powerful and plug compatible with most lead acid and AGM battery charging systems. This battery technology offers many advantages over lead acid and AGM technology including high capacity storage, delivery of consistently high power, longer cycle life, less weight, longer shelf life and rapid efficient charging. LiFePO4 batteries are ideal for use on cruising sailboats, powerboats, fishing boats, and camper vans.
A CMPower (Custom Marine Products) deep cycle lithium battery has two primary components, the LiFePO4 cells and the Battery Management System (BMS). Both are housed in a sealed battery case. The quality of each component is key to the longevity and performance of the battery. LiFePO4 cells are wired in parallel to form a module producing 3.2 volts. Four of these units are connected in series to form a rated 12.8 volt Lithium battery; eight for a 25.6 volt battery. The temperature, charge and discharge rate of each cell is monitored and managed by the BMS, a computer of sorts built into each battery. In addition to cell monitoring and management, the BMS will prevent over discharging of cells by disconnecting the load and will prevent cell over charging by reducing charge current or stopping the charge process. The BMS will also shut down the system if the battery temperature is out of range.
LiFePO4 batteries are also rated as to their maximum discharge capacity; 80 - 100 Amps max discharge capacity is typical. Most CMPower Lithium batteries have a discharge capacity of 150 to 200 amps continuous draw and up to 600 amps short cycle draw to robustly accommodate most house, engine start, windlass, electric winch and inverter battery power requirements.
Charge/discharge cycles - CMPower Lithium batteries have an expected life of 2,000-4,000 charge/discharge cycles at a discharge to 95%. Lead acid batteries have an expected life of 300-500 charge/discharge cycles at a discharge to 50%.
Discharge profile - CMPower LifePO4 Deep cycle Lithium batteries stay at a voltage of 12.5 to 13.4 volts during discharge of up to a 95+%. Voltage then drops off rapidly. A lead acid battery decreases in voltage from 13 to below 11.5 volts as more current is drawn. This means many appliances will operate more efficiently throughout the discharge cycle using LiFePO4 batteries.
Discharge rate - The BMS built into CMPower batteries has a 100 amp to a 200 amp discharge capacity. This means the batteries can sustain a heavy charge and discharge without damage or degradation. Our manufacturer has advised us that the quality of the cells and quality of the BMS is key to the longevity and performance of a LiFePo4 battery. We have seen this firsthand. Great for running windlasses, bow thrusters, or using on a fishing boat for running the trolling motor/electronics/live well/power pole as well as starting the engine.
A CMPower (Custom Marine Products) deep cycle lithium battery has two primary components, the LiFePO4 cells and the Battery Management System (BMS). Both are housed in a sealed battery case. The quality of each component is key to the longevity and performance of the battery. LiFePO4 cells are wired in parallel to form a module producing 3.2 volts. Four of these units are connected in series to form a rated 12.8 volt Lithium battery; eight for a 25.6 volt battery. The temperature, charge and discharge rate of each cell is monitored and managed by the BMS, a computer of sorts built into each battery. In addition to cell monitoring and management, the BMS will prevent over discharging of cells by disconnecting the load and will prevent cell over charging by reducing charge current or stopping the charge process. The BMS will also shut down the system if the battery temperature is out of range.
LiFePO4 batteries are also rated as to their maximum discharge capacity; 80 - 100 Amps max discharge capacity is typical. Most CMPower Lithium batteries have a discharge capacity of 150 to 200 amps continuous draw and up to 600 amps short cycle draw to robustly accommodate most house, engine start, windlass, electric winch and inverter battery power requirements.
Charge/discharge cycles - CMPower Lithium batteries have an expected life of 2,000-4,000 charge/discharge cycles at a discharge to 95%. Lead acid batteries have an expected life of 300-500 charge/discharge cycles at a discharge to 50%.
Discharge profile - CMPower LifePO4 Deep cycle Lithium batteries stay at a voltage of 12.5 to 13.4 volts during discharge of up to a 95+%. Voltage then drops off rapidly. A lead acid battery decreases in voltage from 13 to below 11.5 volts as more current is drawn. This means many appliances will operate more efficiently throughout the discharge cycle using LiFePO4 batteries.
Discharge rate - The BMS built into CMPower batteries has a 100 amp to a 200 amp discharge capacity. This means the batteries can sustain a heavy charge and discharge without damage or degradation. Our manufacturer has advised us that the quality of the cells and quality of the BMS is key to the longevity and performance of a LiFePo4 battery. We have seen this firsthand. Great for running windlasses, bow thrusters, or using on a fishing boat for running the trolling motor/electronics/live well/power pole as well as starting the engine.
"C" is the rated Amp Hour BMS Discharge Capacity (150 Amps)
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Charge and Cycle Curves
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Weight/power ratio - A typical 100 Ah LiFePO4 deep cycle battery weighs about 31 pounds. A comparable lead acid battery is over twice that. Because LiFePO4 batteries can be safely be drawn down 95% vs 50%-60% for lead acid, fewer batteries are required to achieve the same power. Battery weight combined with usable power capacity means battery bank weight can be cut by more than half using LiFePO4 lithium batteries. Also, LiFePo4 batteries will occupy up to 40% less space than equivalent lead acid batteries.
For example, 3 group 31 110 amp hour lead acid batteries weighing a total of 200 pounds can be replaced by 2 group 31 size 100 amp hour LiFePO4 batteries weighing a total of 62 pounds. Both configurations have roughly the same power capacity because the lead acid can be safely drawn down 50% (330 amps @50% = 165 amps) and the Lithium battery can be safely drawn down 95% (200 amps @ 95% = 190 amps). Also, the lead acid will endure 300-500 cycles and the LiFePO4 over 2,000 cycles. Excellent for trolling motors as it is much easier to move the battery on and off for recharging - that is unless you have a portable solar setup on your fishing boat.
Example: Lead Acid LiFePO4 (Lithium)
Battery Bank 3 Group 31 110 Ah 2 Group 31 size 120 Ah
Rated Capacity 330 Amps 240 Amps
Useable Capacity 165 Amps 216 Amps
Charge/discharge cycles 300-500 2,000-4,000
Weight 200 pounds 62 pounds
Cost $1,200 $2,178 ($1,089 each)
Cost per useable Ah $7.27 $9.08
For example, 3 group 31 110 amp hour lead acid batteries weighing a total of 200 pounds can be replaced by 2 group 31 size 100 amp hour LiFePO4 batteries weighing a total of 62 pounds. Both configurations have roughly the same power capacity because the lead acid can be safely drawn down 50% (330 amps @50% = 165 amps) and the Lithium battery can be safely drawn down 95% (200 amps @ 95% = 190 amps). Also, the lead acid will endure 300-500 cycles and the LiFePO4 over 2,000 cycles. Excellent for trolling motors as it is much easier to move the battery on and off for recharging - that is unless you have a portable solar setup on your fishing boat.
Example: Lead Acid LiFePO4 (Lithium)
Battery Bank 3 Group 31 110 Ah 2 Group 31 size 120 Ah
Rated Capacity 330 Amps 240 Amps
Useable Capacity 165 Amps 216 Amps
Charge/discharge cycles 300-500 2,000-4,000
Weight 200 pounds 62 pounds
Cost $1,200 $2,178 ($1,089 each)
Cost per useable Ah $7.27 $9.08
Smartphone app for LiFePO4 Battery Monitoring
Charging Safety - Lithium batteries have a reputation for catching fire. This is not so with LiFePO4, a very different technology. The built-in Battery Management System (BMS) monitors the state of charge of each cell group and manages the temperature, charge and discharge rates. The BMS will prevent over-charging and over-discharging by disconnecting from the source. There are no toxic chemicals or gases as in many types of lead acid batteries. The batteries can be mounted in any direction; bottom or side.
Compatibility - While the optimal charging parameters vary between Lithium, AGM and lead acid battery technology, the BMS built into CMPower LiFePO4 batteries compensates for this. Thus, our LiFePO4 boat batteries are compatible with most lead acid battery charging systems.
Charging Multiple Battery Types - LiFePO4 and lead acid or AGM batteries are not compatible and should not be combined. However, CMPower batteries used for the house bank and lead acid or AGM batteries used for engine starting can both charged from a single alternator or generator. This requires some easy to install electrical equipment including a DC-DC charger or a battery isolator.
Bluetooth Battery Monitoring - CMPower Lithium batteries are equipped with Bluetooth for monitoring battery State of Charge (SoC) through a Smartphone or tablet app. This is important because unlike lead acid batteries, LiFePO4 batteries maintain a constant voltage between 13 and 13.4 volts so a voltmeter is not an accurate indicator of SoC. A built in Bluetooth capability enables real time monitoring of each battery through an app on either an Android or IOS smartphone or tablet. The app displays the state of charge (SoC) of the battery, the amp draw and voltage level, the temperature, the time to full charge and the number of charge/discharge cycles. This capability is nearly equivalent to having a built in battery bank monitoring system like a Link 2000. Have confidence that you have plenty of power and know exactly when you'll need to run your engine. Terrific feature for fishermen using a single battery for both a trolling motor and engine starting battery.
Winter Operation and Storage - CMPower LiFePO4 Lithium deep cycle batteries can be stored in temperatures from -10°F to +104°F (-25°C to +40°C). It is recommended they not be heavily charged and discharged at temperatures below -4°F (-20°C) . It is recommended that the negative terminals be disconnected during winter or long term storage so there is no chance of draining the batteries while in storage. LiFePO4 lithium batteries should be recharged at a minimum every 6 months while in storage.
Long Term Investment - Keep Them for Life - Because the number of charge cycles of well cared for CMPower LiFePO4 lithium batteries is in excess of 2,000 they can be a long term investment you can take with you from boat to boat or boat to RV. Also, because the batteries have a built in cycle recording system, the batteries can be resold at a value based on their number of charge cycles. For example: The owner of a sailboat purchased three LiFePO4 batteries two years ago; two for house and one for engine starting. After two years of cruising the starting battery had 2 charge cycles and the house batteries, wired in parallel, had only 20 charge cycles as shown on the Bluetooth APP. These batteries are like new and can be taken to their new boat or sold as quality used batteries. In fact, if and when CMP Lithium batteries become available from our customers, we will post them on our website for purchase.
Warranty - 7 years + - Custom Marine Products warrants each branded battery to be free of defects for a period of 1 year from the date of sale as determined by either the customer’s sale receipt, or other proof of purchase plus an additional 6 years prorated. Within the warranty period CMP will credit, replace or repair the product and/or parts of the product if determined to be defective in material or workmanship. CMPower batteries are built to last a minimum of 2,000 cycles and still maintain 80% of rated energy capacity. This warranty applies to the original owner.
Cost - CMPower LiFePO4 deep cycle lithium batteries are 2 to 4 times the cost of comparable lead acid or AGM type batteries. Cost justification is often based on convenience, performance and longevity. Factors to consider in evaluating cost include the number of charge cycles, power to weight ratio, charge and discharge efficiency and compatibility. Over the long term, these batteries are often considerably more cost effective than lead acid or AGM batteries.
Bottom line - CMPower LiFePO4 lithium marine batteries have the following advantages:
1. Bluetooth equipped to monitor battery State of Charge with free app - built in battery monitor
2. can be drawn down 95+% vs 50% - more usable capacity
3. hold steady voltage through 95% discharge - constant power and voltage
4. generally plug compatible with lead acid chargers - drop-in replacement
5. charge more quickly and efficiently than lead acid batteries - excellent for solar systems
6. have up to (and beyond) 10 times more charge cycles than lead acid and AGM batteries - could last a lifetime
7. nontoxic and safe, very low fire risk - no toxic gases emitted, many built-in protections
8. low self-discharge - easy winter storage, long shelf life
9. lighter than lead acid - lightweight, generally less than half the weight of lead acid (~4x the power per pound)
10. cost effective in the long run
Lithium batteries are more expensive than lead acid however their many advantages and longevity often outweigh the additional initial investment.
Compatibility - While the optimal charging parameters vary between Lithium, AGM and lead acid battery technology, the BMS built into CMPower LiFePO4 batteries compensates for this. Thus, our LiFePO4 boat batteries are compatible with most lead acid battery charging systems.
Charging Multiple Battery Types - LiFePO4 and lead acid or AGM batteries are not compatible and should not be combined. However, CMPower batteries used for the house bank and lead acid or AGM batteries used for engine starting can both charged from a single alternator or generator. This requires some easy to install electrical equipment including a DC-DC charger or a battery isolator.
Bluetooth Battery Monitoring - CMPower Lithium batteries are equipped with Bluetooth for monitoring battery State of Charge (SoC) through a Smartphone or tablet app. This is important because unlike lead acid batteries, LiFePO4 batteries maintain a constant voltage between 13 and 13.4 volts so a voltmeter is not an accurate indicator of SoC. A built in Bluetooth capability enables real time monitoring of each battery through an app on either an Android or IOS smartphone or tablet. The app displays the state of charge (SoC) of the battery, the amp draw and voltage level, the temperature, the time to full charge and the number of charge/discharge cycles. This capability is nearly equivalent to having a built in battery bank monitoring system like a Link 2000. Have confidence that you have plenty of power and know exactly when you'll need to run your engine. Terrific feature for fishermen using a single battery for both a trolling motor and engine starting battery.
Winter Operation and Storage - CMPower LiFePO4 Lithium deep cycle batteries can be stored in temperatures from -10°F to +104°F (-25°C to +40°C). It is recommended they not be heavily charged and discharged at temperatures below -4°F (-20°C) . It is recommended that the negative terminals be disconnected during winter or long term storage so there is no chance of draining the batteries while in storage. LiFePO4 lithium batteries should be recharged at a minimum every 6 months while in storage.
Long Term Investment - Keep Them for Life - Because the number of charge cycles of well cared for CMPower LiFePO4 lithium batteries is in excess of 2,000 they can be a long term investment you can take with you from boat to boat or boat to RV. Also, because the batteries have a built in cycle recording system, the batteries can be resold at a value based on their number of charge cycles. For example: The owner of a sailboat purchased three LiFePO4 batteries two years ago; two for house and one for engine starting. After two years of cruising the starting battery had 2 charge cycles and the house batteries, wired in parallel, had only 20 charge cycles as shown on the Bluetooth APP. These batteries are like new and can be taken to their new boat or sold as quality used batteries. In fact, if and when CMP Lithium batteries become available from our customers, we will post them on our website for purchase.
Warranty - 7 years + - Custom Marine Products warrants each branded battery to be free of defects for a period of 1 year from the date of sale as determined by either the customer’s sale receipt, or other proof of purchase plus an additional 6 years prorated. Within the warranty period CMP will credit, replace or repair the product and/or parts of the product if determined to be defective in material or workmanship. CMPower batteries are built to last a minimum of 2,000 cycles and still maintain 80% of rated energy capacity. This warranty applies to the original owner.
Cost - CMPower LiFePO4 deep cycle lithium batteries are 2 to 4 times the cost of comparable lead acid or AGM type batteries. Cost justification is often based on convenience, performance and longevity. Factors to consider in evaluating cost include the number of charge cycles, power to weight ratio, charge and discharge efficiency and compatibility. Over the long term, these batteries are often considerably more cost effective than lead acid or AGM batteries.
Bottom line - CMPower LiFePO4 lithium marine batteries have the following advantages:
1. Bluetooth equipped to monitor battery State of Charge with free app - built in battery monitor
2. can be drawn down 95+% vs 50% - more usable capacity
3. hold steady voltage through 95% discharge - constant power and voltage
4. generally plug compatible with lead acid chargers - drop-in replacement
5. charge more quickly and efficiently than lead acid batteries - excellent for solar systems
6. have up to (and beyond) 10 times more charge cycles than lead acid and AGM batteries - could last a lifetime
7. nontoxic and safe, very low fire risk - no toxic gases emitted, many built-in protections
8. low self-discharge - easy winter storage, long shelf life
9. lighter than lead acid - lightweight, generally less than half the weight of lead acid (~4x the power per pound)
10. cost effective in the long run
Lithium batteries are more expensive than lead acid however their many advantages and longevity often outweigh the additional initial investment.
Why use Lithium batteries for a trolling motor?
Lithium (LiFePo4) batteries are perfect for trolling motors because they offer high capacity storage per pound (nearly 4x), consistently high power at same voltage (means higher operating efficiency), much longer lifespan (up to 10x and more), less weight (half), longer shelf life and rapid efficient charging (20% more efficient), availability of 95% of rated battery amperage instead of 50-60% available in lead acid. Some even offer a bluetooth app to your phone so you can see exactly how much power you have left at any time.
What are the major components of a LiFePO4 battery?
A LiFePO4 battery has two primary components, the LiFePO (lithium iron phosphate) cells and the Battery Management System (BMS). Both are inside a sealed battery case. The quality of the cells and BMS are key to the longevity and performance of the battery. LiFePO cells are wired in parallel to form a single module producing 3.2 volts. Four of these modules are connected in series to form a rated 12.8 volt LiFePO4 battery; eight for a 25.6 (24) volt battery. The temperature, charge and discharge of each cell is monitored and actively managed by the BMS, a computer built into each battery. In addition to cell monitoring and management, the BMS will prevent over-discharging of cells by disconnecting the load and will prevent cell over-charging by reducing charge current or stopping the charge process. The BMS will also shut down the system if the battery temperature is out of range and wait for it to come down before continuing to charge.
Are lithium batteries good for trolling motors?
Absolutely. They are half the weight with twice the power. Easy to take on and off the boat to charge, or charge them with solar where they are about 20% more efficient at charging than lead acid. They run at a consistent voltage most of the way through their charge cycle which means more efficient motor operation. They have almost four times more amperage per pound meaning less batteries are needed. Ours comes with a bluetooth app so you can check how much charge you have on your phone at any time - lessens the chance of being stranded on the water. Can run as both a starter battery and a trolling motor battery. Can be used to run all your components including power pole, GPS, fish finder, live well, charge your phone.
Can I use a single lithium battery for starting and everything else on my fishing boat?
Yes for sure, we have customers who run their entire boats with a single lithium battery. It is very efficient in terms of weight, space, charging speed and cost. An excellent solution for skiffs, bass boats, flats boats, jon boats with trolling motors, power poles, live wells, and so on.
What if my controller does not have settings for lithium batteries?
If a LiFePO4 or lithium setting is not available on your controller, use the 'USER' function to program and set the following parameters:
Absorption voltage: 14.4 volts (acceptable range is 14.2 to 14.6 volts)
Absorption Time: The recommended setting is half an hour per 100ah of LiFePO4 battery
(for example: for 2 -100ah batteries select 1 hour).
Float Voltage: 13.5 volts (13.6 volts or lower is acceptable for LiFePO4 batteries although float is not necessary)
Equalization voltage: Do not equalize LiFePO4, turn off the equalize function, but in case it ever runs a cycle or equalization can’t be turned off set to 13.4 volts.
Temperature Compensation: LiFePO4 batteries do not need temperature compensation.
Low Temperature cut-off: -5 degrees C, 20 degrees F