Description
Stinger SGP32 200 Amp Dual Battery Isolator and Relay
The SGP32 is a 200A continuous, 500A peak dual battery isolator and relay from Stinger, designed for 4WD, offroad, touring, and high-draw audio builds running a secondary battery bank. It automatically disconnects primary and secondary batteries when the vehicle is not running, preventing a discharged accessory battery from draining the starting battery. Compatible with all alternator and charging system types including lithium and AGM. Water-resistant black phenolic enclosure. Lifetime performance warranty against manufacturer defects.
Product overview
The Stinger 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, ensuring accessories draining the secondary battery cannot pull down the primary starting battery needed to start the vehicle.
The SGP32 handles 200 amps of continuous current and 500 amps peak, covering high-draw accessory loads including car audio amplifiers, compressor fridges, air compressors, lighting rigs, and camp power draws. It is compatible with all alternator and charging system types, including setups mixing lithium and standard lead-acid battery types, without compatibility concerns when upgrading the charging system. The water-resistant black phenolic plastic enclosure is built for under-bonnet and chassis mounting in 4WD and PowerSports applications. A mounting bracket and instruction manual are included.
Features and benefits
Automatic battery isolation: Disconnects the primary and secondary batteries when the vehicle is off, preventing a deeply discharged accessory battery from draining the starting battery overnight or at camp.
200A continuous and 500A peak current handling: Built for high-demand dual battery setups running amplifiers, compressor fridges, air compressors, lighting rigs, and other accessory loads simultaneously.
Compatible with all alternator and charging systems: Works with standard, AGM, lithium, and dual-alternator setups without compatibility concerns when mixing battery types or upgrading the charging system.
Water-resistant black phenolic enclosure: The housing is built to withstand moisture, dust, and vibration for under-bonnet and chassis mounting in 4WD and PowerSports applications.
Mounting bracket included: A mounting bracket is included in the kit for straightforward installation without sourcing additional hardware.
Lifetime performance warranty: Backed by a lifetime warranty against manufacturer defects, providing long-term confidence in the product across its service life.
What's in the box
- 200A relay
- Mounting bracket
- Instruction manual
Technical specs
| Specification |
Detail |
| SKU |
SGP32 |
| Brand |
Stinger |
| Continuous Current Rating |
200A |
| Peak Current Rating |
500A |
| 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 |
| Warranty |
Lifetime performance warranty, manufacturer defects |
Frequently asked questions
How does a dual battery isolator 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 a lithium LiFePO4 secondary battery?
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. Confirm your alternator output voltage is within the acceptable range for your specific lithium battery before installing.
What accessories can be run from the secondary battery with the SGP32?
The SGP32 is rated for 200A 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 include everything needed for installation?
The kit includes the 200A relay, a mounting bracket, and an instruction manual. Wiring, fusing, and terminals appropriate to your installation must be sourced separately. Contact us for guidance on compatible Stinger SGP series power accessories to complete your dual battery wiring solution.
What is the warranty on the SGP32?
The Stinger SGP32 is backed by a lifetime performance warranty against manufacturer defects. Contact us for warranty claims or support after purchase.
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