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The Stinger SGP32 Pro is a 200-amp high-current relay that isolates a second battery from the starting battery. It lets you run a stereo, winch or accessory load off the auxiliary battery without draining the one that starts the engine. It is a simple electromechanical relay, not a smart voltage-sensing isolator, so it is cheaper and simpler than those units but lacks automatic low-voltage cutoff. It suits car audio and off-road builds adding a second battery on a budget.
In stockSold by Malibu Flow MarketplaceReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Lowest price we've seen: $64.79 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Owners in car audio and off-road forums treat the SGP32 as a dependable, no-frills isolator that does its job for years. Complaints center on wiring sensitivity and the lack of smart cutoff rather than failures.
The Stinger SGP32 PRO is a 200 amp battery isolator for dual battery setups. It is a high current relay that lets you add secondary batteries to a vehicle's electrical system.
It keeps the starting battery separate from the secondary battery. You can listen to the stereo with the engine off and fully discharge the secondary battery without draining the starting battery, so the vehicle can still start.
It is compatible with all types of alternators.
