12V solar panels charging kits for caravans, motorhomes, boats, yachts, marine

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40W solar panel suitcase worked better than expected - completely charged our leisure battery in a few hours on a very overcast day.

Addie (Walton, Norfolk, UK) - Aug 2013

We are a trusted supplier to thousands of UK clients

We are a trusted supplier to thousands of UK clients

Dual battery MPPT controllers

High efficiency 165W 12V Dual Battery MPPT solar charge controller / regulator for up to 50V solar input

High efficiency 165W 12V Dual Battery MPPT solar charge controller / regulator for up to 50V solar input
High efficiency 165W 12V Dual Battery MPPT solar charge controller / regulator for up to 50V solar input

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Ex. VAT £74.99
Inc. VAT £89.99
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We are proud to offer this exceptionally rare 165W 12V solar charge controller which boasts a unique combination of both MPPT and Dual Battery functions. This best-selling model is the very first of its kind; combining two highly sought-after features to create a previously unprecedented type of solar charge controller. German design, engineering and manufacturing also ensure unrivalled quality and reliability.

Dual Battery Capability :

This high quality 165W 12V dual battery solar charge controller is designed to charge and protect 2 batteries simultaneously, with automatic cut off to prevent over-charging. This makes it a perfect solar controller for a caravan, motorhome, boat or any other system with 2 batteries (e.g. engine and leisure battery). The main battery will be charged with full available power, whilst the second battery will be trickle charged (max 1 Amp). Please note: this controller also functions with only one battery connected. In this case, 100% of the charging current will be passed to the single battery. A second battery may be added at any time.

Maximum Power Point Tracking (MPPT) Technology:

Using the most advanced technology in the solar controller market, this controller specifically pinpoints the maximum power voltage point of the solar panel(s) as it varies depending on sunlight exposure and temperature. This ensures the maximum efficiency of your solar system and significantly outperforms standard PWM solar controllers. Another benefit of MPPT technology is the wide solar input voltage range - this controller can work not only with standard off-grid solar panels, but also with on-grid panels or solar panel arrays up to 50V. The maximum allowed input solar power for this controller is 165W.

Full Range of Protection Functions:

This charge controller features a comprehensive set of electronic protection functions to prevent reverse current at night (from the battery back to the solar panel), over-charging, short circuit and battery reverse polarity protection.

Advanced Battery Compatibility:

Unlike many other less advanced solar charge controllers, this model is 100% compatible with a broad range of battery types, such as Gel, AGM, Lead-Acid Flooded and Lithium batteries; with several different charging options available for each type.

This 165W 12V solar charge controller also has a connection socket for a remote meter which can be purchased here.

Click on the 'Details and Specifications' tab for more information about this product.


Controller specifications:

  • Maximum solar panel power 165W and current 10A
  • Maximum solar panel voltage 50V
  • Advanced MPPT technology to ensure high efficiency of your solar system > 95%
  • Fully automated operation and battery recognition
  • LEDs to indicate state of charge
  • Connection point for a remote meter (not included)
  • Various protection features (over charge, short circuit, battery reverse polarity etc)
  • Easy to connect screw terminals for solar panel, batteries and control wires
  • External fuse for easy replacement
  • Self-consumption: 4mA
  • Working temperature: -20 to +45°C
  • Size: 13 x 8 x 4 cm
  • Weight: 190 g
  • Multiple mounting flanges for ease of installation


This product is covered by a 2 year manufacturer warranty. For more information please refer to our Terms and Conditions.



This unit comes with a detailed user manual which explains wiring and operations.

If you need help with installation or have any technical questions we can provide FREE support - please contact us by email or phone (see Contact Us page for more information).



The following documents are available to download:

User manual for MPP165 Votronic 165W 12V MPPT Dual Battery solar charge controller