---
product_id: 10263753
title: "SGP32 200 AMP Battery Relay Isolator and Relay, 12V"
brand: "stinger"
price: "€ 132.39"
currency: EUR
in_stock: true
reviews_count: 13
category: "Stinger"
url: https://www.desertcart.fi/products/10263753-sgp32-200-amp-battery-relay-isolator-and-relay-12v
store_origin: FI
region: Finland
---

# 200 AMP max current Automatic dual battery switching Prevents primary battery drain SGP32 200 AMP Battery Relay Isolator and Relay, 12V

**Brand:** stinger
**Price:** € 132.39
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay charged, stay unstoppable — power your adventures with Stinger!

## Quick Answers

- **What is this?** SGP32 200 AMP Battery Relay Isolator and Relay, 12V by stinger
- **How much does it cost?** € 132.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/10263753-sgp32-200-amp-battery-relay-isolator-and-relay-12v)

## Best For

- stinger enthusiasts

## Why This Product

- Trusted stinger brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Battery Life Guardian:** Prevents your primary battery from draining, ensuring reliable starts every time.
- • **Compact & Durable Design:** Chassis mountable with copper contacts for long-lasting, corrosion-resistant performance.
- • **Seamless Dual Battery Sync:** Automatically connects batteries when running, disconnects when off—smart energy management.
- • **Powerhouse 200 AMP Capacity:** Handles heavy loads effortlessly for all your high-current needs.
- • **Universal 12V Compatibility:** Fits perfectly with any 12V system—marine, automotive, or commercial gear.

## Overview

The Stinger SGP32 is a robust 200 AMP battery relay isolator designed for 12V systems, expertly preventing primary battery discharge by isolating dual batteries. It automatically connects batteries during engine operation and disconnects them when off, extending battery life and ensuring reliable power delivery for vehicles, marine applications, and heavy-duty equipment.

## Description

"Looking for a rely or isolator? Check out the Stinger 200 Amp Relay and Isolator! Use a Stinger relay with multiple battery installs and help prevent draining all batteries for safe starting. Using an isolator when adding a second battery will keep the batteries from discharging each other and allow you to run accessories from the secondary battery without draining the primary battery. When installed correctly per instructions, the 2 batteries are automatically connected when the vehicle is started and running and disconnected when the vehicle is off. SGP Series high-current relays can also be used in applications requiring 80 amp to 500 amp current like motors, winches, commercial equipment, etc. The 2 small terminals are for switching the relay on and off. Either of the small terminals should be connected to chassis ground or other ground location and the other terminal to switching power output. Switching power must be between 10 volts DC and 16 volts DC. The relay coil draws less than 1 amp when switched on."

Review: Great for Dual Battery Marine Installation - This high current 12V relay was used to add a 2nd battery to my Malibu Response Inboard Skiboat (See attached schematic). A. Wiring and Installation: With the addition of: Heavy Gage Starter Cables, Silicon Diode, White LED, LED Resistor and SPDT Switch; two AGM Sealed LeadAcid 12V Batteries were installed in the battery nook of the boat. The compact LED assembly and Switch was mounted on top of the Relay. The Relay was secured to the battery bulkhead with Stainless Steel screws. B. Operation: The switch provides two operating Modes: 1-Ignition, 2-On. 1. The default condition is with the switch set for IGNITION operation. When the boat's ignition is activated via the key, the 12V ignition wire activates the relay and adds the 2nd battery in parallel to the primary. This supplies 12V power when the ignition is turned on for starting and accessories. Both batteries are also in the boat's charging circuit. The LED lights up when the relay is engaged. 2. The 'On' switch condition is available to provide power from the 2nd battery continuously. The LED stays active. The 12V source for the Relay Solenoid is the 2nd battery. C. Application Notes: 1. The main advantages of using an isolator for the dual battery configuration are: a. A leaky, bad or discharged backup battery cannot drain the primary when the boat is idle. b. On my boat, most of the accessories will drain the battery if the dash switches are left on. If the primary battery is completely discharged, the engine won't start. Switching to the 'On' position will tie in the backup battery and should provide enough power for boat operation. 2. I used my older battery as the primary and a new one as the backup (secondary). This ensures that the healthier battery will be available when needed. 3. The benefits of this setup are: a. Provides extra starting current for my V8 Chevy Vortec. b. Doubles the number of AmpHours available to run accessories.
Review: Great isolator for adding a second Yukon Battery - I have had continuous problems with my 2004 Yukon battery dying, as the vehicle sits more than it is used and seems to have a significant power draw from the electronics and aftermarket radio install. GMC and Chevrolet offered a second battery as an option, and the tray is available aftermarket online. I purchased the Stinger SGP32 200 AMP Battery Relay Isolator and Relay, and took it and my backup second battery to Broadway Auto Electric in Lemon Grove for professional installation. Now my Yukon starts very strongly every time, and I don't have to worry about getting stuck at the most inopportune times. The Stinger SGP32 200 AMP Battery Relay Isolator and Relay keeps the second battery out of the phantom draw when the car sits, and uses both batteries to start the car when the ignition switch is turned on. I could have wired it and installed it myself, and if you deal with auto electronics and are familiar with such things this would be a very easy install. I would recommend the Stinger SGP32 200 AMP Battery Relay Isolator and Relay for similar applications.

## Features

- 200 AMP Battery Isolator and Relay
- Prevents primary battery discharge
- Maximum current transfer
- Extends battery life
- Universal 12V Applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001HBYXVS |
| Best Sellers Rank | #14,990 in Automotive ( See Top 100 in Automotive ) #10 in Automotive Replacement Accessory Power Relays |
| Brand | STINGER |
| Coil Voltage | 12 Volts |
| Color | BLACK |
| Connector Type | Quick Connect |
| Contact Current Rating | 200 Amps |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Current Rating | 200 Amps |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,535) |
| Date First Available | October 2, 2008 |
| Department | STINGER |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.4 pounds |
| Item model number | SGP32 |
| Manufacturer | Stinger |
| Maximum Switching Current | 1 Amps |
| Maximum Switching Voltage | 12 Volts |
| Minimum Switching Voltage | 12 Volts |
| Mounting Type | Chassis Mount |
| Operation Mode | Automatic |
| Other display features | Wireless |
| Product Dimensions | 7.9 x 2.7 x 5.9 inches |
| UPC | 609098797788 609098796019 |
| Wattage | 12 watts |
| Whats in the box | Stinger |

## Product Details

- **Connector Type:** Quick Connect
- **Contact Material:** Copper
- **Contact Type:** Normally Open
- **Current Rating:** 200 Amps
- **Mounting Type:** Chassis Mount

## Images

![SGP32 200 AMP Battery Relay Isolator and Relay, 12V - Image 1](https://m.media-amazon.com/images/I/71U91yrL3BL.jpg)

## Questions & Answers

**Q: Do I install this before or after a 100 amp bus prewired in my vehicle?**
A: It depends which battery you want to power the bus, and how the bus is wired. If the bus is connected in between both batteries, I would put the isolator before the bus to only drain the accessory battery when the vehicle is off. Once again, depends on how the bus is wired though.

**Q: Is it better to leave the 2 battery connected all the time or its better to disconnect the auxiliary battery if i choose to use a switch**
A: The purpose of the Stinger SGP32 200 AMP Relay is to provide an electronic "switch" that can connect two batteries (or battery systems) at the control of a 1A, 12V signal. In typical use, the relay's signal input is attached to your vehicle's Accessory On, Ignition On or Engine Run signal. In this way, your two batteries are automatically connected by the relay when your vehicle is on and disconnected when your vehicle is off. You could add 1 or more additional manual switches to provide a manual override to the automatic relay.

**Q: What gauge wire is recommended?**
A: You can search google for "Wire Gauge Amps Chart" and that will provide more detailed information on what size wire gauge is required for your specific installation.

But I would definitely recommend using 1/0awg Oxygen-Free Copper (OFC) power wire if your components will be drawing anywhere near 200 amps.

**Q: I have a 210amp alternator will this size work for me or would in need to go bigger? Am i also capable of also using this as a relay without 2 batterys**
A: 1. Your relay capacity should match your alternator, not your load. So you theoretically need a minimum of 210 amp relay. 
2. Yes. It is basically just a solenoid that isolates one terminal from the other until it is activated.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for Dual Battery Marine Installation
*by R***G on June 25, 2024*

This high current 12V relay was used to add a 2nd battery to my Malibu Response Inboard Skiboat (See attached schematic). A. Wiring and Installation: With the addition of: Heavy Gage Starter Cables, Silicon Diode, White LED, LED Resistor and SPDT Switch; two AGM Sealed LeadAcid 12V Batteries were installed in the battery nook of the boat. The compact LED assembly and Switch was mounted on top of the Relay. The Relay was secured to the battery bulkhead with Stainless Steel screws. B. Operation: The switch provides two operating Modes: 1-Ignition, 2-On. 1. The default condition is with the switch set for IGNITION operation. When the boat's ignition is activated via the key, the 12V ignition wire activates the relay and adds the 2nd battery in parallel to the primary. This supplies 12V power when the ignition is turned on for starting and accessories. Both batteries are also in the boat's charging circuit. The LED lights up when the relay is engaged. 2. The 'On' switch condition is available to provide power from the 2nd battery continuously. The LED stays active. The 12V source for the Relay Solenoid is the 2nd battery. C. Application Notes: 1. The main advantages of using an isolator for the dual battery configuration are: a. A leaky, bad or discharged backup battery cannot drain the primary when the boat is idle. b. On my boat, most of the accessories will drain the battery if the dash switches are left on. If the primary battery is completely discharged, the engine won't start. Switching to the 'On' position will tie in the backup battery and should provide enough power for boat operation. 2. I used my older battery as the primary and a new one as the backup (secondary). This ensures that the healthier battery will be available when needed. 3. The benefits of this setup are: a. Provides extra starting current for my V8 Chevy Vortec. b. Doubles the number of AmpHours available to run accessories.

### ⭐⭐⭐⭐⭐ Great isolator for adding a second Yukon Battery
*by J***D on August 23, 2023*

I have had continuous problems with my 2004 Yukon battery dying, as the vehicle sits more than it is used and seems to have a significant power draw from the electronics and aftermarket radio install. GMC and Chevrolet offered a second battery as an option, and the tray is available aftermarket online. I purchased the Stinger SGP32 200 AMP Battery Relay Isolator and Relay, and took it and my backup second battery to Broadway Auto Electric in Lemon Grove for professional installation. Now my Yukon starts very strongly every time, and I don't have to worry about getting stuck at the most inopportune times. The Stinger SGP32 200 AMP Battery Relay Isolator and Relay keeps the second battery out of the phantom draw when the car sits, and uses both batteries to start the car when the ignition switch is turned on. I could have wired it and installed it myself, and if you deal with auto electronics and are familiar with such things this would be a very easy install. I would recommend the Stinger SGP32 200 AMP Battery Relay Isolator and Relay for similar applications.

### ⭐⭐⭐⭐⭐ Battery isolator
*by Y***A on July 16, 2025*

Very good high quality isolator it functions very well.

## Frequently Bought Together

- Stinger SGP32 200 AMP Battery Relay Isolator and Relay
- BOJACK 0/2/4 Gauge ANL Fuse Holder and 200 Amp ANL Fuses for 0 2 4 8 Gauge AWG Fuse Block, Fuse Box, Automotive Fuse Holder 200A (Pack of 2)
- TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fi/products/10263753-sgp32-200-amp-battery-relay-isolator-and-relay-12v](https://www.desertcart.fi/products/10263753-sgp32-200-amp-battery-relay-isolator-and-relay-12v)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-25*