Dual Battery Solar Charge Controller. 11 Amps. 170 Watts. Grey. DB1C


Dual battery solar charge controller. Charge your leisure battery and your engine battery with one solar panel

Prolong battery life with SunWorks precision Duo technology

New ‘Winter‘ mode. Automatically prevents either battery from discharging during long storage periods

Protects both leisure and engine batteries from overcharge

Looks smart in your living space. Also available in black

 Clear LCD display shows the solar current and both battery levels

Cables can enter from the back or from the side. No more unsightly wiring

Fully automatic. For all 12 volt battery systems.



Dual Battery Solar Charge Controller with LCD Display.

The SunWorks DB1C dual battery solar charge controller for solar panels up to 11 amps (170 watts).

  • Optimal charging of both engine and leisure batteries, from one solar panel.
  • Precision Duo system specially designed for motorhomes and boats
  • Prolongs battery life through SunWorks enhanced pulsed charge system
  • Includes our new ‘Winter’ mode. This automatically prevents either battery from discharge in low-light conditions:
    • Great for motorhomes and boats stored for long periods. Especially those with active alarm systems
  • Fully automatic.  No setting up routine
  • Intelligent 3-stage precision Duo charging:
    • ‘Boost’ mode to take full advantage of the available sunlight
    • ‘Absorption’ mode to maximise charge levels, and prolong battery life
    • ‘Float’ mode to maintain the batteries once they are fully charged
  • Large clear LCD display provides continuous reading of the solar current and both battery voltages
    • ‘See’ your solar panel working
  • Available in black or light grey to enhance the interior of any motorhome or boat.
  • Cables can be concealed. All cables can enter from the back, or from the side, of the controller
  • Attractive, compact design
  • No visible fixing screws
  • Can accept solar panels of up to 170 watts, 11 amps
  • Suitable for all 12 Volt leisure and engine batteries. Liquid or gel types
  • Proven high reliability. Five year guarantee

SunWorks solar panels that suit the DB1C dual battery solar charge controller:

We can supply rigid aluminium-framed panels, semi-flexible panels and marine grade solar panels. For example:

Installation information for use with a dual battery solar charge controller:

Installing a dual battery solar charge controller is straightforward for the competent DIY person.

Each controller comes with complete illustrated instructions. Here are the basics:

  • The controller is mounted inside the boat or motorhome where it can be seen by the user.
  • Mount the unit such that the cables can pass through the back or the side of the controller. A bulkhead or cupboard side are suitable places.
  • A 2-wire cable must pass through the roof or deck to connect the controller to the solar panel.
  • A 2-wire cable must connect the controller to each of the two batteries via a suitable fuse.

Typical connections for a motorhome:

Typical connections for a boat:

Below we list some useful accessories that will ease the installation of your solar panel system.

Wiring accessories:

To help install this dual battery solar charge controller on your motorhome or boat, we recommend the following items:

Other useful accessories:

To make a secure and watertight connection through the roof of your motorhome or the deck of your boat:

If you need any further help or advice concerning this product, please do not hesitate to contact us: [email protected]

Additional information

Shipping Weight 0.3 kg


Maximum solar panel current

11 Amps

Maximum solar panel power

170 Watts

Battery operating voltage (nominal)

12 Volts


110 mm x 85 mm x 35 mm


Light grey

Controller weight

210 grams

Charge modes

Boost (bulk), Absorption (PWM), Float (PWM), Winter

Recommended wire type

2.5 mm sq. automotive cable

Connection type

Screw terminals

Solar panel maximum Voc

35 volts

Operating temperature

-15 degC to +50 degC

Storage temperature

-25degC to +60degC

Display resolution

0.1 (10th’s) for volts and amps

Self consumption

< 6.6 mA

Environmental protection



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