OUR STORES HAVE RE-OPENED Opening Hours Mon-Sat 9:00am-5:30pm / Sundays 10:00am-4:00pm

Self-switching Smart Split Charge Relay For Towbar Electrics

MSRP   £16.99

Split-charge relay for providing power to the caravan's internal electrics via the towbar S-type or 13-pin socket - requires no connection to the alternator.

Home Delivery
Click and Collect

Straightforward to fit, the Smart Split-Charge relay provides power to the caravan's 12 volt supply, battery charging and refrigerator, via a towbar's 12S or 13-pin socket (socket not included). Recommended over the old-fashioned split charge relay on modern vehicles, as this self-switching unit requires no connection to the vehicle alternator.


Triggered by the rise in battery voltage when the alternator is providing a charge (when the engine is running), the self-switching relay provides power to the caravan whilst prioritising the towing vehicle's battery - in heavy-load conditions (such as air conditioning in full in a traffic queue at low RPM), the caravan power will cut out if the towing vehicle's battery is under heavy load and not receiving a charge - the supply resumes when the charge rate increases, ensuring that the caravan's refrigerator or auxiliary battery charge does not drain or over-stress the towbar's battery.


Note: Due to varying suppliers of this unit, the actual design of the relay casing may vary from that illustrated, the functionality remains identical.

UK Delivery Zones MapDelivery Options Start from £3.95*

Uninsured postage service available for items up to 1kg volumetric weight and £20 value

Zone A

Standard Delivery £4.95* (FREE on orders £95+)*

Allow 3-5 working days for delivery.

Expedited Delivery options from £6.95*

Options for 1-2 working day delivery and next day timed services available on most items

Zone B

Surcharge Areas

Scottish Highlands / Offshore Islands within post code list below:
AB31 to 38, AB40 to 56, HS, IV1 to IV28, IV30 to 32, IV36 to 49, IV51, IV55 & 56, IV63, KA27 & KA28, KW1 to 17, PA20 to 38, PA41 to 49, PA60 to 78, PH4 to 44, PH49 to 50 & ZE

Standard Delivery from £14.95* (£4.95 REDUCTION on orders £95+)

Full rates are available on our delivery, terms and conditions page.


Some heavy or bulky items are charged differently:

  • TRAILERS & ABS HARD TOPS - Bulky Item Courier Service (7-10 Day Delivery) : £50 to Zone A
    (varied rates apply to these items to other delivery zones)
  • KAYAKS - Bulky Item Courier Service (7-10 Day Delivery) : £30 to Zone A
    (varied rates apply to these items to other delivery zones)

Some other items are held at a remote warehouse any may be available on STANDARD delivery only. In these cases, expedited delivery options are not available to choose at checkout. Also for these items, click & collect reservations may take up to a week to come into store - where this is the case you will be contacted by the store as soon as possible.



Customer Reviews

Only registered users can write reviews. Please Sign in or create an account