








⚡ Power up your adventure with seamless dual battery control!
The UCkasayfy 12V 140Amp Voltage Sensitive Relay (VSR) is a rugged, IP67 waterproof dual battery isolator designed to automatically manage and protect your vehicle’s batteries. Compatible with trucks, RVs, marine vessels, and off-road campers, it ensures efficient parallel charging and emergency reverse charging, keeping your power systems reliable in any environment. Not suitable for lithium batteries.


| Manufacturer | UCkasayfy |
| Part number | UK-BR001-12V-1 |
| Item Weight | 220 g |
| Package Dimensions | 7.8 x 7.6 x 6.7 cm; 220 g |
| Manufacturer reference | UK-BR001-12V-1 |
| Style | 12V VSR |
| Plug profile | Boat Mount |
| Batteries included? | No |
| Batteries Required? | No |
J**O
Well built, good product.
Over the year I have used two of these Adjustable Voltage Sensitive Relays. They are well built, easily programmed and function accurately. Have not tried with high currents but the relays switch 30 amps perfectly. Very pleased with the product.EDIT -I note a misleading review (USA) criticising the small gauge of the supplied fixed black cable. This black cable only supplies the negative reference for the onboard programming circuitry and is perfectly adequate. Your positive IN supply, and the positive switched current OUT, are bolted to the large terminals using your own cables, both of which should be of a size suitable for the current load.
P**D
Great product
Very quick and easy set up and works perfectly
S**S
Perfect split charge relay, with very handy push button override function.
Perfect split charge relay, that give the user the ability to manually connect the 2 battery's in use, inserted, to allow you to jump you vehicle from you leisure battery, without jump leads, in an emergency.
C**S
Works in both directions
Fitted this to my van, to charge my auxiliary battery, cuts in and out as expected, as a bonus if the Solar system connected to the aux battery gets high enough it puts charge back into the main battery, and maintains both battery’s while parked up and sunny, happy days
M**K
Not very good
Not very good.Failed within a couple of months.Internal relay wasn’t disconnecting and discharging vehicle battery.Prefer the slightly more expensive one with a voltage meter. And a very distinct switching of the relay.
M**.
Fantastic relay system for split charhe
Not much to say, perfect for a split charge relay system, keeps my 130amh leisure battery system in tip top condition,The pack contains everything needed for a good installation and the cables are solid, and heavy duty, highly recommended for the bigger leisure battery systems 😉
M**M
Does the job
Very fast delivery. Well packaged
N**L
Good
Does what I need it to do, but wondering why the kit didn't include 2 fuses like other split charge relays? I bought a couple separate just incase. Not showing them in the instructions but better to be safe than sorry.
Trustpilot
2 months ago
5 days ago