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Dual Battery Bank Controller

Dual Bank Battery Controller - Charging of two independent battery banks: The owner can set charging priority between the two battery banks in steps of 10%. For example, you can decide that 90% of the solar current should go to the house battery and 10% to the start battery.  When one battery bank is full all the power is redirected to the other battery.
EP Duo Solar Controller
This controller is designed specifically for charging two independent battery banks.

Charge controller for dual battery systems
Model EP Duo 12/24V 10A  (for   50 - 140 Watts of solar energy)
Model EP Duo 12/24V 20A  (for 150 - 280 Watts of solar energy)
(We no longer carry these but they are easily found elsewhere)
​
Both models offer the following advanced features:


Charging of two independent battery banks:
The owner can set charging priority between the two battery banks in steps of 10%. For example, you can decide that 90% of the solar current should go to the house battery and 10% to the start battery.  When one battery bank is full all the power is redirected to the other battery.

Battery optimized charging algorithms:

• Advanced PWM four stage algorithm with bulk, absorption, float and boost (equalization) charging.
• Charging voltages are optimized for the selected lead-acid battery type (liquid, sealed or gel).
• Selectable PWM charging frequency (25, 50 or 100Hz)
• Temperature compensated charging using either a built-in temperature sensor or an optional remote sensor.

External display with charging data (option):

• External backlit LCD display can be mounted recessed or in a provided frame up to 10 m (33 ft) from the charge controller.
• Display shows charging voltage, actual current, max current and total amp-hours provided by the solar panels.
• Display shows current, minimum and maximum voltage of each battery bank as well as charge provided in amp-hours.
• Other information includes temperature, time, charge priority and frequency settings and troubleshooting information.

Dimensions:
•
Charge controller: 6" x 3 1/16" x 1 3/8" (155 x 77 x 35 mm).
   Weight 8.8 oz. (250 g) for 10A model, 10.6 oz. (300 g) for 20A model.
•  Remote display: Cutout hole if flush mounted: 3"(75 mm), face plate 3 3/4" x 3 3/4" x 5/16" .

   Frame mounted dimensions 4 1/2" x 41/2" x 1 9/16" (112 x 112 x 40 mm). Weight 5.3 oz. (150 g)

Specifications - Controller:
  • For 12V and 24V systems (nominal voltage), automatically sensed. Charging voltages given below should be multiplied by 2 for 24V operation.
  • Max solar current 10 A  for smaller panels or 20 A  for larger panels (greater than 150 watts)
  • Absorption voltage 14.2V (sealed battery), 14.4V (flooded battery), 14.6V (industrial battery) or
  • Boost voltage 30 min 14.4V (sealed battery), 14.6V (flooded battery), 14.8V (industrial battery)
  • Float voltage 13.7V (all battery types)
  • Max intrinsic power use 4 mA at night, 10 mA when charging
  • Protected against short circuits, over-currents, reverse currents and lightning
  • Temperature range for use : from -35°C to +55°C
  • Temperature compensation -30 mV/°C
  • 4 mm2 (10-12 AWG) max wire size terminals to solar panel and batteries
  • 1.5 mm2 (16 AWG) terminals for optional remote temperature sensor
  • RJ45 connector for cable to optional remote display
  • IP22 ingression protection
  • Circuit protected against high humidity
  • Minimum operating voltage: 8 Volts
Click here to see the Duo Controller Instruction Manual

Wiring a Dual Output Solar Controller

A Typical Wiring Diagram for Charging Two Battery Banks Using Two Solar Panels and Our Dual Output Solar Controller
A Typical Wiring Diagram for Charging Two Battery Banks Using Two Solar Panels and Our Dual Output Solar Controller

Remote Display

Remote Solar Panel Controller Display Showing Panel Output and Battery Condition
Remote Solar Panel Controller Display Showing Panel Output and Battery Condition


Remote Solar Panel Controller Display Showing Panel Output and Battery Condition
This optional remote display provides all the information you need to track the performance of your solar panel.  It is particularly useful when optimizing panel tilt using our top-of-pole mounting system. 

The display plugs into the Dual Bank Battery  Controller.

Features include:
  • Monitors and Displays Solar Charge Rates
  • Monitors and Displays Condition and Charge of both Battery Banks.
  • Solar Charge shown in volts, amps, amp/hr. rate, and frequency rate.
  • Displays % of charge for both batteries.
  • Battery Charge shown in volts, volts min., volts max., and amp/hr. stored.
  • Displays both Battery Banks Separately.
  • Displays Time and Local Temp.
  • Optional  RTS Displays Battery Temp. and Adjusts Charge Rate.
  • Adjustable Backlighting
  • Adjustable Data Repeat.
  • 10 Meter Cable
  • RJ45 connector for cable to charge controller
  • Max intrinsic power use 17mA with no backlight, 20mA with low backlight and 23mA with bright backlight

Remote Temperature Sensor

Picture
The optional remote temperature sensor constantly measures and  displays storage battery temperature so the controller can adjust charge rate appropriately. This is especially important when using temperature sensitive gel batteries.  This option will increase battery life by 100-200 charge/discharge cycles.

The sensor plugs into the Dual Bank Battery  Controller and is attached to the top of a battery in the battery bank with tape.



Dual Battery Bank Controllers

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Picture

​10 Amp. Dual Battery Solar Controller

​Charging of two independent battery banks:
The owner can set charging priority between the two battery banks in steps of 10%. For example, you can decide that 90% of the solar current should go to the house battery and 10% to the start battery.  When one battery bank is full all the power is redirected to the other battery.

Battery optimized charging algorithms:

• Advanced PWM four stage algorithm with bulk, absorption, float and boost (equalization) charging.
• Charging voltages are optimized for the selected lead-acid battery type (liquid, sealed or gel).
• Selectable PWM charging frequency (25, 50 or 100Hz)
• Temperature compensated charging using either a built-in temperature sensor or an optional remote sensor.

Specifications - Controller:
  • For 12V and 24V systems (nominal voltage), automatically sensed. Charging voltages given below should be multiplied by 2 for 24V operation.
  • Max solar current 10 A  for smaller panels or 20 A  for larger panels (greater than 150 watts)
  • Absorption voltage 14.2V (sealed battery), 14.4V (flooded battery), 14.6V (industrial battery) or
  • Boost voltage 30 min 14.4V (sealed battery), 14.6V (flooded battery), 14.8V (industrial battery)
  • Float voltage 13.7V (all battery types)
  • Max intrinsic power use 4 mA at night, 10 mA when charging
  • Protected against short circuits, over-currents, reverse currents and lightning
  • Temperature range for use : from -35°C to +55°C
  • Temperature compensation -30 mV/°C
  • 4 mm2 (10-12 AWG) max wire size terminals to solar panel and batteries
  • 1.5 mm2 (16 AWG) terminals for optional remote temperature sensor
  • RJ45 connector for cable to optional remote display
  • IP22 ingression protection
  • Circuit protected against high humidity
  • Minimum operating voltage: 8 Volts
Shop Now
Picture

​20 Amp. Dual Battery Solar Controller

​Charging of two independent battery banks:
The owner can set charging priority between the two battery banks in steps of 10%. For example, you can decide that 90% of the solar current should go to the house battery and 10% to the start battery.  When one battery bank is full all the power is redirected to the other battery.

Battery optimized charging algorithms:

• Advanced PWM four stage algorithm with bulk, absorption, float and boost (equalization) charging.
• Charging voltages are optimized for the selected lead-acid battery type (liquid, sealed or gel).
• Selectable PWM charging frequency (25, 50 or 100Hz)
• Temperature compensated charging using either a built-in temperature sensor or an optional remote sensor.

Specifications - Controller:
  • For 12V and 24V systems (nominal voltage), automatically sensed. Charging voltages given below should be multiplied by 2 for 24V operation.
  • Max solar current 10 A  for smaller panels or 20 A  for larger panels (greater than 150 watts)
  • Absorption voltage 14.2V (sealed battery), 14.4V (flooded battery), 14.6V (industrial battery) or
  • Boost voltage 30 min 14.4V (sealed battery), 14.6V (flooded battery), 14.8V (industrial battery)
  • Float voltage 13.7V (all battery types)
  • Max intrinsic power use 4 mA at night, 10 mA when charging
  • Protected against short circuits, over-currents, reverse currents and lightning
  • Temperature range for use : from -35°C to +55°C
  • Temperature compensation -30 mV/°C
  • 4 mm2 (10-12 AWG) max wire size terminals to solar panel and batteries
  • 1.5 mm2 (16 AWG) terminals for optional remote temperature sensor
  • RJ45 connector for cable to optional remote display
  • IP22 ingression protection
  • Circuit protected against high humidity
  • Minimum operating voltage: 8 Volts
Shop Now

Picture

​Remote Display for EP Duo Dual Output Controller

​Get all the information you need to monitor the performance of your solar panel.
This is a very popular item with our customers.
Shop Now
Picture

​Remote Temperature Sensor for Dual Output Controller

​Monitors storage battery temperature.  Plugs into Dual Battery Controller.
Shop Now
Picture

​10 Amp. Dual Battery Controller, Remote Display and Temperature Sensor

​Purchase the complete solar panel control system and save.
Controller, Remote Display, Temp Sensor.
Shop Now
Picture

​20 Amp. Dual Battery Controller, Remote Display and Temperature Sensor

​Purchase the complete solar panel control system and save.
Controller, Remote Display, Temp Sensor.
Shop Now


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  • Home
  • Marine Solar Panels
    • All Marine Solar Panels
    • Flexible Marine Solar Panels >
      • Flexible Panel Specifications
      • Flexible Panel Bimini Solar System Kits
      • Flexible Solar Panel Mounting Kits
    • Semi-Rigid Walk On Marine Solar Panels >
      • Semi-Rigid Panel Specifications
      • Semi-rigid Solar System Kits
      • Semi-rigid Panel Mounting System
    • Rigid Marine Solar Panels >
      • Rigid Panel Specifications
      • Rigid Solar System Kits
      • Mounting System - Top Of Pole
    • Van Solar Panels
    • Stern Rail Mounted Solar Panels
    • Discounted Solar Panels
    • Portable Solar Panels
    • Shop Our Store
  • Products
    • Marine Solar Panels
    • Lithium Batteries >
      • LiFePO4 Lithium Batteries
      • Portable Power Stations
    • Solar Controllers >
      • Victron MPPT Controllers
      • EP Solar Controllers >
        • DuoRacer Dual Output Series
        • Xtra-N Series
        • MPPT Tracer Series
        • PWM Duo Dual Output Controller
    • Accessories >
      • Wire & MC4 Connectors
      • Outboard Motor Lifting Crane >
        • Lift Crane Features and Specs
      • Solar Water Heating System For Boats
    • Victron Products >
      • Victron MPPT Controllers
      • Victron Electrical Components
      • Inverters
      • Victron Batteries
    • Shop Our Store
  • Reviews
    • Reviews
    • Gallery of Installations
  • Handy Info
    • Learn About Solar
    • System Design
    • Solar System Installation Pointers
    • Manuals & Information
  • Support
    • FAQ
    • Troubleshooting
    • Contact Us
    • Solar System Installers
    • Battery Exchange Plus
    • Handy Products We Don't Carry
    • Freight Forwarders for International Shipping
    • About us
    • Call (248)453-2433
    • Return Policy
    • Shipping Rates
  • Blog