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⚡ Stay charged, stay ahead — power your adventures with smart dual-battery control!
The Heart Horse 12V 140A Split Charge Relay is a robust voltage sensitive relay designed for dual battery systems in campervans, boats, and 4x4s. Featuring a real-time LED voltage display, automatic/manual operation modes, and precise 13.3V cut-in/12.8V cut-out thresholds, it ensures efficient charging of auxiliary batteries without draining the starter battery. Its IP68-rated housing guarantees durability in tough environments, making it an essential upgrade for reliable off-grid power management.
| ASIN | B0B9GMP4SZ |
| Best Sellers Rank | 5,098 in Automotive ( See Top 100 in Automotive ) 12 in Car Relays |
| Brand | Heart Horse |
| Coil Voltage | 12 Volts |
| Connector Type | Screw |
| Connector type | Screw |
| Contact Current Rating | 140 Amps |
| Contact Material | Copper |
| Contact Type | Normally Closed |
| Contact material | Copper |
| Contact type | Normally Closed |
| Country Of Origin | China |
| Current Rating | 140 Amps |
| Current rating | 140 Amps |
| Customer Reviews | 4.4 out of 5 stars 328 Reviews |
| Item Highlight | 12V 140A VSR with LED voltage display, auto/manual modes and 13.3V cut-in/12.8V cut-out for campervans, boats and RVs. |
| Manufacturer | TripleWaterTripleGood |
| Manufacturer Part Number | sku3426-yy |
| Minimum Switching Voltage | 12.8 Volts (DC) |
| Model Number | sku3426-yy |
| Mounting Type | Screw Mount |
| Mounting type | Screw Mount |
| Operation Mode | Automatic |
| Specification Met | ABS |
| Wattage | 1680 watts |
S**R
Can recommend
Works perfect.
A**R
See the result
Ray fit, great product . Love the voltage display and so do customers.
R**D
Very good item a must have on a camoervan
Easy to fit the only I did not like was you have to press the button all the time to read the voltage apart from that it’s a good item I e had many problems with my camper van this for the price has solved the issue
M**1
Easy to fit, works well
Easier to install as smarter than the old split charger relays as detects voltage from the battery itself, rather than from alternator trigger wire. Solid state means no electronics exposed to moisture/physical damage. Display handy to see what's going on. Recommended!
H**D
Split charge relay
Excellent service very quick and efficient. Product works brilliantly well impressed thanks
A**R
Simple to install
Great bit of kit, easy to install and fully documented in the instructions. My only concern being the pcb coating (like a rubber / gel) grinding away when the terminal was fitted with a wire / connection and the nut was tightened.
A**R
Good buy
Works perfectly
G**.
Not compatible with lithium batteries
This is a good product and works fine with lead acid batteries, but I was using it as a safety cut out for lights running off a lithium battery and it drained the battery to the point that the bike wouldn’t start (Measuring 10.9v)
C**.
God kvalitet
Fungerar som beskrivs. Saknar dock utgång för extern indikation av status.
N**L
Bon produit
Très bien
M**N
Split Relay charger
Exactly what i ordered very happy with it. and it arrived earlier than I expected it.
M**Ì
Ottimo prodotto
Funziona veramente bene, non ha nulla a che invidiare ai relè di ricarica più blasonati che si trovano in commercio. Ne ho già presi diversi e mai avuto problemi. Interessante il display che indica la tensione di lavoro. Ovviamente si spegne dopo alcuni secondi e per visualizzare bisogna schiacciare il bottone. Il led di funzionamento invece lavora in automatico come sale la tensione.
J**R
Worked till it didn’t. Lasted about 200 days in total…
***** UPDATE ******* Works as described. Nice to have digital display to confirm voltages. So far so good. Been installed a few months. ***UPDATE*** Installed last August 2025 and it’s end of March 2026 and it has failed! Comes with a 180 day warranty!!! About 200 days has passed since installed and it’s dead! I definitely would NOT recommend this product any longer as it has a very short life span and petty warranty. Keep on scrolling for a better brand or warranty at least….
Trustpilot
1 month ago
1 day ago