Smart Dual Battery Isolator 12V 140A Auto or Manual Control, Waterproof Voltage Sensitive Relay(VSR) with Digital Voltmeter for Car, RV, ATV, UTV, Boat, Marine

easy install, more compact than the manual to isolate switch before. works as intended.

So far so good. Its doing the job.

The POWO by Carlife dual battery isolator with digital display is easy to Install and works great. The display is a little hard to see in bright light, but that is the nature of LED technology. The unit is installed in the back of my truck and connects the two batteries that power my winch, which has no connection to the truck's electrical system. The batteries are connected through the isolator to a battery charger powered by either a generator or the trucks 120v outlet in the bed. The system works great for light use, and will hopefully never get tested under heavy. (which would mean I am stuck up to my doors)

You will read reviews that it doesn’t shut off at exactly 12.8v, but it’s usually anything between 12.4v and 12.8v, which is enough to get your vehicle started. I have a spare battery in the back of my jeep and this is mounted just above it. I run a diesel heater off my spare battery, so when the spare gets depleted, it does in fact prevent the main battery from being affected. Overall a nice safeguard if you have a similar situation and need to ensure your vehicle can start after using devices for a prolonged period of time.

Stopped working just outside of return period but they offered full refund so I changed review from 1 star to 5 stars due to their excellent customer service

By far the best solution to keep my generator start battery fully charged and ready to use. I could have added a third charger, but the proximity to engine start battery made this simple to connect and enable charging and isolation at the same time. Voltage display is a nice bonus. Build quality: I like the ability to manually control the isolator, as well as automatic switching.

Put an electric jack on my horse trailer.....needed a battery to run it and this little gadget to keep it charged without running down my primary truck battery. Took a Saturday to install everything cause I take my time.the photo doesn't show the battery box cause I was still waiting for it to be delivered. Everything except the wood was ordered on Amazon

New update.. costumer service replaced with a new one and now is working properly

Bis jetzt tut es seinen Dienst,warten wir den langzeittest ab. werde dann Berichten.

working good

fast delivery great little unit for caravans

Wurde heute geliefert,der 3m Kabelsatz fehlt ist nicht wie beschrieben.

Das Set beinhaltet alles was man braucht. Leider ist die Anleitung falsch. Die Position der Plusleitung ist relevant für die korrekte Funktion. Bei meinem Relais musste der Pluspol der Starterbatterie am Anschluss gegenüber des Masseanschlusses angebracht werden. Sonst zeigt das Relais immer die Spannung der Zweitbatterie an und verbindet die Batterien nicht automatisch nach Motorstart. In der Anleitung ist es anders abgebildet. Nach der Änderung der Verkabelung funktioniert alles einwandfrei. Wenn man ein Ladegerät an die Zweitbatterie anschließt, wird die Starterbatterie nicht automatisch mitgeladen. Ist dies gewünscht, kann man die Batterien manuell verbinden.