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£88.00 (inc VAT) £73.33 (exc VAT)
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Product Description

Heavy duty, voltage sensing split charge relay kit



 12v - For any 12v negative earth vehicle

 Max. Charge

 180 Amps

 Cable Length

 6 Meters


 Compatible with Canbus & Multiplex Systems


 (Suitable for all 12v systems)




Typical Applications...

The heavy duty voltage sensing split charge relay is used for charging a second battery from your main vehicle (crank) battery. The voltage sensing relay is different from standard split charge relays in that it does not require an alternator connection or ingition switching wire, it simply connects between the two batteries. When the engine is started, the relay detects the higher voltage from the alternator/main battery and will then switch to allow charge to go through to the leisure battery. No over charging can take place and the main battery is charged as normal, so there is no interference with the existing system. Once the engine is switched off, the relay will then open (switch off) and in doing so, disconnects the two batteries so that no matter how flat the leisure battery becomes, it wont affect the main battery.

Example of use...

If you install a second battery in your vehicle for running additional appliances, ie. A camper conversion, and need it to be charged from your vehicles existing system. The relay is connected between the vehicles main battery (Positive) and the leisure battery (Positive). The relay allows charge to the second battery to maintain a fully charged state.

What is supplied with the kit?

Everything apart from tools is supplied to complete the installation:

  • 1 x 12v, 180 Amp Split Charge Relay Module
  • 2 Meters, 110 Amp Tri Rated Cable
  • 2 Meters, Split Conduit for cable protection
  • 1 Meter, 110 Amp Earth Lead
  • 2 x Box Type Fuse Holers
  • Multiple Crimp/Solder Terminal Ring Connectors for all connections
  • 15 x Mounting Screws
  • 10 x Sticky Pad Cable Tie Anchors for cable support
  • 15 x Cable Ties
  • 1 x Length Double Sided Tape
  • 4 x 100 Amp Fuses ( 2 of which for spares )
  • Pack of Cable Sleeving (Braided Glass, Silicon Coated)
  • Full Fitting Instructions


Safety is always our priority, we provide double fusing with all our kits, it is important to fuse the kit on both sides of the relay. All the cable supplied with our kits is Tri Rated cable (heat resisting PVC) meeting the requirements of BS6231.


We supply a full range of light & heavy duty split charge systems to suit specific requirements

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