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🔋 Keep your dual-battery system charged and ready—because downtime is not an option!
The Keenso VSR Voltage Sensitive Relay is a 12V, 140A dual battery isolator designed for dual battery vehicles. It features flexible mounting options, a durable fiberglass reinforced nylon build, and smart automatic charging that prevents voltage loss. Ideal for ensuring reliable starts and efficient battery management, it comes with a product guarantee and dedicated customer support.



| ASIN | B07H9YTL86 |
| Best Sellers Rank | 371,444 in Automotive ( See Top 100 in Automotive ) 1,547 in Car Relays |
| Brand | Keenso |
| Coil Voltage | 12 Volts |
| Connector Type | Screw |
| Contact Current Rating | 140 Amps |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Country Of Origin | China |
| Current Rating | 125 Amps |
| Customer Reviews | 4.4 4.4 out of 5 stars (79) |
| Item Weight | 231 g |
| Manufacturer | Keenso |
| Manufacturer Part Number | Keenso3qbp5t80ug |
| Maximum Switching Voltage | 12 Volts |
| Model Number | Keenso3qbp5t80ug |
| Mounting Type | Surface Mount |
| Number of Terminals | 3 |
| Operation Mode | Automatic |
| Specification Met | CE IP67 |
| UPC | 792117030956 |
T**Y
Highly recommended!
Worked well, fitted to a horsebox to enable a split charge system to operate correctly. Working well, has been fitted for a couple of months now and no further battery problems occurring!
N**E
Does what it says on the tin!
See this brand of relay often being sold in the more expensive split charge relay motorhome kits. Was much cheaper to buy this and then buy the wiring separately as I only needed shorter bits for my own set up.
D**Y
works fine as far as I can see
works fine as far as I can see
A**R
It works
Works well but the main two mounting screws provided are rather short and not easy to get a solid fix with.
T**Y
Excellent Relay
This is the second of these relays I have purchased, both of which replaced other brand relays which failed within two years.
N**E
Excellent product. Very happy.
Excellent product. Very happy.
A**L
It works!
Good quality product and worked perfectly.
C**N
De momento lo he probado y funciona correctamente apartir de 13,7 +- se conecta y si la carga baja o se corta el contacto, separa las baterías. Pero cuidado yo lo llevo montado en una Renault trafic del 2014 y no funciona correctamente, debido a que el propio alternador cuando la batería principal está cargada baja la intensidad y el conmutador separa las baterías y hasta que la principal no baja de carga no se vuelven a conectar, dejando agotar la bat secundària.
S**.
Läuft super.bin sehr zufrieden. Schnelle Lieferung
C**N
Perfetto
D**I
Si è rovinato dopo neanche un mese, qualità pessima, questo è il secondo, quindi mi ha dato conferma dell'ineguatezza dei materiali per l'ambiente marino.
J**R
Lo instalé siguiendo el esquema sin mayor problema, y cuando lo probé funcionó a la primera. Cogí el polímetro para ver si saltaba el relé cuando el alternador empezaba a subir el voltaje, y sí, a partir de unos 13,2V ya conectaba la 2ª batería. Al apagar el motor, se desconecta. Vamos, hace lo que tiene que hacer. Muy contento.
Trustpilot
2 weeks ago
2 months ago