Dual Battery Solar Charge Controller. 15 Amps. 240 Watts. Black. DB2C


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 light grey.

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.

SunWorks DB2C dual battery solar charge controller for solar panels up to 15 amps.

  • 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 DuoPWM 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 240 watts, 15 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 DB2C dual battery solar charge controller:

The DB2C dual battery charge controller is suitable for use with any SunWorks solar panel over 100 watts.

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

15 Amps

Maximum solar panel power

240 Watts

Battery operating voltage (nominal)

12 Volts


110 mm x 85 mm x 35 mm



Controller weight

220 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

Environmental protection



  1. Richard B (verified owner)

    Thanks for the follow up, I finished the installation a couple of weeks back and my batteries are now nice and healthy; just as well since we can no longer get to our boats for the foreseeable.

    Fitting was straightforward after reading your guides and I now have a nice neat and effective set up.

  2. Richard Collins

    The support I have received has been excellent. Though it’s early days in using this, so far it seems to be a very good product

  3. S Copeland

    Terrific bit of kit from a British Company. Always prepared to give advice and guidance. I had the 11amp version first on a 140w panel and used it on my motorhome for 3 years. A new van and 240w pair of panels has meant an upgrade to the 15amp version.

  4. L Draycott

    Excellent product! So easy to install and neat! I had an old one of these fitted on my old Motorhome and it worked great. I bought a new large RV and wanted to keep both the coach battery and leisure batteries charged. This does it perfectly with a 160w solar panel. What I love most is the display as it tells me how much charge I have in the batteries and if I am wild camping I know how long I can run the batteries before I have to switch to the generator!!

  5. M Chinn

    Great unit, it looks good and maintains the charge in my two campervan batteries without any fuss or bother. Straightforward installation with no set-up configurations to worry about as the unit automatically sets it self. Clear display provides all the information you need at a glance. Sunworks provided me with email confirmation of my order and delivery date. Unit arrived on time and well packed.

  6. B Cooper

    I have just upgraded my solar regulator to the Sunworks 15amp charger, having had one of their older versions installed on my yacht for years. A truly excellent product, never faltered and easily the best looking unit on the market; taking pride of place alongside my recently fitted switch panel.

  7. C Dally

    This is an superb product much more sophisticated than the older model I have used for last 9 years. Great service and delivery and much cheaper than I paid 9 years ago so would rate this product 5 star plus. Colin

  8. P Reynolds

    I did a lot of research into which solar controller to fit with my new 2 x 100w flexible panels. I was cautious about buying a Far East made controller on quality and service backup grounds. I finally chose the Sunworks dual battery controller, because I heard good reports yacht owners, and the fact that it fits flat to the wall without wires showing. Before buying, I had a number of queries about the controller which were answered promptly by Sunworks by email, so my confidence started to grow.

    The controller comes with clear instructions written in good plain English – not a Far Eastern translation! When you open the pack, the controller looks good, well designed, and I could see that it would blend well with the between decks decor my Hallberg Rassy yacht – full hardwood interior.

    Fitting was straightforward, and I am not an electrician. Having followed the instructions and connected up, the controller light up immediately, separately telling me the voltages of my engine start and domestic battery bank, together with the rate and what type of charge it was performing.

    Since fitting, one of the first things I do each morning is to look at the readout with a satisfied smile knowing that any power we used overnight has gradually been replaced from dawn, and there will be no more low battery problems.

    An excellent, good looking controller, which is easy to fit – look no further!

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