Heavy Duty 12V 140A Voltage Sensitive Relay Vsr Dual Battery Isolator Keeps Your Whip Fully Supplied With Juice For Trucks Rvs Atvs Utvs And Marine Rigs Always Rolling
✔️ 12 volt 140 amp capacity works perfectly with lead acid batteries
This single voltage sensitive relay kit manages two separate power sources inside pickup trucks rv chassis and marine platforms. You wire the unit between your stock alternator and your auxiliary house bank so both stay charged without drinking starter juice during idle periods, muddy trail rides, or salty harbor stays.
✅ Cuts in at 13 point 3 volts to begin charging cycles✅ Drops connection at 12 point 8 volts to protect cranking power
✅ Sealed rubber housing blocks dust vibration and splash water
✅ Ships with flat mounting bracket plus four heavy duty fasteners
💡 How does a voltage sensitive relay keep dual battery systems charged during off road travel?
- This voltage controlled switch monitors alternator output before diverting electrical current
- Engine voltage climbs past 13 point 3 volts and the sealed contacts close automatically
- Your auxiliary bank draws steady charging current while the starter bank stays isolated
- This handy circuit design prevents dead house batteries when parking marine rigs or campervans