Keep Your Starting Battery Safe Stinger SGP32 200A Dual Battery Isolator Product Overview The Stinger SGP32 is a 200 amp dual battery isolator and relay designed for 4WD overlanders, offroaders, and high-draw audio builds that rely on a secondary battery to power accessories. By automatically disconnecting the primary and secondary batteries when the vehicle is not running, the SGP32 ensures your secondary battery bank can power fridges, amplifiers, compressors, and lighting without ever draining the starting battery you need to get home. The SGP32 handles 200 amps of constant current and 500 amps peak, suits all charging and alternator system types, and is housed in a water-resistant black phenolic plastic enclosure for reliable performance in the harsh conditions typical of Australian 4WD and offroad use. Backed by Stinger's lifetime performance warranty on manufacturer defects. Features & Benefits Automatic battery isolation: Disconnects the primary and secondary batteries when the vehicle is off, preventing a deeply discharged accessory battery from dragging down your starting battery overnight or at camp. 200A constant / 500A peak current handling: Built for high-demand dual battery setups running amplifiers, compressors, ARB fridges, lighting rigs, and other accessory loads simultaneously. Compatible with all alternator and charging systems: Works with standard, AGM, lithium, and dual-alternator setups — no compatibility concerns when mixing battery types or upgrading your charging system. Water-resistant black phenolic enclosure: The housing is built to withstand moisture, dust, and vibration — engineered for under-bonnet and chassis mounting in 4WD and powersports applications. Includes mounting bracket: Hardware is included so you can get the isolator installed without hunting for additional brackets. Lifetime performance warranty: Stinger backs the SGP series with a lifetime warranty against manufacturer defects — a strong confidence statement for a component that lives under the bonnet. Technical Specs Specification Detail Part Number SGP32 Continuous Current Rating 200 Amps Peak Current Rating 500 Amps Housing Material Water-resistant black phenolic plastic Charging System Compatibility All types — including AGM, lithium, and standard lead-acid Alternator Compatibility All alternator system types Includes 200A relay, mounting bracket, instruction manual Warranty Lifetime performance warranty (manufacturer defects) Weight Not specified Compatible With / Goes Well With All 12V dual battery setups — 4WD, offroad, touring, and high-performance audio builds AGM, lithium, and standard lead-acid battery combinations All alternator and charging system types Accessories drawing from a secondary battery: amplifiers, fridges, compressors, lighting, air lockers Stinger SGP series power distribution blocks and connection hardware Note: Always size your wiring to the continuous current draw of your accessory load. The SGP32 is rated for 200A continuous — ensure your cable and fusing are rated to match. Frequently Asked Questions How does a dual battery isolator actually work? The SGP32 uses a relay that closes when the vehicle is running (and the alternator is charging), allowing both batteries to charge simultaneously. When the ignition is off, the relay opens and isolates the two batteries from each other — so accessories draining the secondary battery cannot pull down the primary starting battery. Does the SGP32 work with lithium (LiFePO4) secondary batteries? Yes — the SGP32 is compatible with all charging and alternator system types, including setups running a lithium secondary battery alongside a standard lead-acid starter battery. Note that lithium batteries have different charging voltage profiles, so confirm your alternator output voltage is within the acceptable range for your specific lithium battery before installing. What accessories can I run from the secondary battery with the SGP32? The SGP32 is rated for 200 amps continuous, supporting high-draw accessories including car audio amplifiers, 12V compressor fridges, air compressors, lighting rigs, and camp power draws. Size your secondary battery and wiring to the total load you intend to run. Does the SGP32 come with everything needed for installation? The kit includes the 200A relay, a mounting bracket, and an instruction manual. You will need to supply your own wiring, fusing, and terminals appropriate to your installation — F.A.E. stocks Stinger SGP series power accessories and can advise on a complete dual battery wiring solution. Is the SGP32 covered under warranty? Yes — the Stinger SGP32 is backed by a lifetime performance warranty against manufacturer defects. Contact F.A.E. for warranty claims or support after purchase. 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