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MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator

Q: what's the override for?

It makes the relay inside switch to open/throughput mode.. I have not had it confirmed for how long, or the need to keep a toggle or momentary switch on it, or have tested it myself yet, but when activated will make both batteries in parallel and steps the amps up in case you need it to start the vehicle or maybe give something an amp boost.

Q: Boat use. Off-season how do I keep both batts charged/ maintained? 1 or 2 bank charger if both vsr post are sensing? Most others have a + trigger wire

Put a trickle charger, battery tender, on one battery. When it hits 13 volts the vsr will turn on and will start charging the second battery as well.

Q: what is the yellow wire and how is it connected is a switch included?

The yellow wire bypasses the automatic feature should your main battery voltage drop below the cut off voltage. You can buy a switch to use this feature. The switch just needs to feed to a negative connection in your vehicle. If you car has a negative ground like most cars do, you can just touch it to bare metal should you need to temporarily by pass the automatic cut off.

Q: Can this be used to supply power to the aux terminal on a 7 way connector of a tow vehicle even if the trailer has no battery but has interior lights?

We so sorry, it is not fit 7way, U can choose our another 8 Gang Switch Panel, that can control battery and LED light

4.5/5

Product ID: 257387276

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MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator

Have a Question? See What Others Asked

what's the override for?

Boat use. Off-season how do I keep both batts charged/ maintained? 1 or 2 bank charger if both vsr post are sensing? Most others have a + trigger wire

what is the yellow wire and how is it connected is a switch included?

Can this be used to supply power to the aux terminal on a 7 way connector of a tow vehicle even if the trailer has no battery but has interior lights?

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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