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The VSR004 is a compact 12V voltage sensitive relay that links a main and an auxiliary battery, switching the charge between them automatically or by hand. It handles up to 80 amps, adds a 15-second delay to stop chatter, and shows both battery voltages on an LCD. Its sealed plastic housing suits UTVs, ATVs, jet skis and snowmobiles where space is tight. Against bare relays it adds the voltmeter and manual override; against bigger smart isolators it gives up capacity and app control.
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This dual battery isolator kit is a 12V, 80 amp voltage sensitive relay (VSR) for dual-battery systems. It is sized for compact spaces such as UTVs, ATVs, jet skis and snowmobiles, and it can be installed without vehicle modifications.
The relay has a plastic housing that is waterproof, dustproof and shockproof. It is built to withstand mud, water, cold temperatures and vibration. A 15-second automatic delay avoids frequent switching, which helps extend the service life of the isolator and the battery.
Installation needs no tools or specialized knowledge, and the original wiring stays unmodified.
