Dual Battery Smart Isolator 12V 140 Amp Voltage Sensitive Relay VSR Smart Switch
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$18.79at WalmartChecked Nov 10
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This is a voltage sensitive relay that automatically links a second battery to the charging system when the main battery rises above roughly 13.3V, and disconnects it when voltage drops. It is rated 125A continuous and 140A intermittent, with M6 studs and a compact 65 x 65 x 50 mm ABS case. It suits dual-battery setups in 4x4s, campers and boats where you want the aux battery charged while driving without a manual switch. Compared with manual isolators it needs no input from the driver; compared with DC-DC chargers it is far simpler and cheaper but does not boost voltage, so it charges the aux battery only as well as the alternator does.
In stockSold by Mrain SkyReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
This is a 12V dual battery smart isolator, a voltage sensitive relay (VSR) switch.
The housing is made of ABS plastic and measures 6.5 cm x 6.5 cm x 5 cm. It has M6 (1/4 inch) terminal studs. It is rated for 125A continuous and 140A intermittent DC current.
