---
product_id: 10264161
title: "SGP35 High-Current 500A Car Audio Dual Battery Isolator & Relay | Universal compatibility, 100k mechanical cycle life, water-resistant design for marine or powersports stereos & accessories"
brand: "stinger"
price: "$224.07"
currency: USD
in_stock: true
reviews_count: 13
category: "Stinger"
url: https://www.desertcart.us/products/10264161-sgp35-high-current-500a-car-audio-dual-battery-isolator-relay
store_origin: US
region: United States of America
---

# 500A continuous current Water-resistant phenolic plastic 100,000 mechanical cycles SGP35 High-Current 500A Car Audio Dual Battery Isolator & Relay | Universal compatibility, 100k mechanical cycle life, water-resistant design for marine or powersports stereos & accessories

**Brand:** stinger
**Price:** $224.07
**Availability:** ✅ In Stock

## Summary

> 🔌 Power your ride like a pro—stay charged, stay unstoppable!

## Quick Answers

- **What is this?** SGP35 High-Current 500A Car Audio Dual Battery Isolator & Relay | Universal compatibility, 100k mechanical cycle life, water-resistant design for marine or powersports stereos & accessories by stinger
- **How much does it cost?** $224.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/10264161-sgp35-high-current-500a-car-audio-dual-battery-isolator-relay)

## 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

- • **Built to Brave the Elements:** Water-resistant phenolic plastic housing ensures durability in marine, off-road, and powersports environments.
- • **Universal 12V Compatibility:** Works flawlessly with any vehicle alternator or charging system—no compatibility worries.
- • **Power On Demand, No Compromise:** Handles up to 500 amps continuous and 900 amps surge for ultimate vehicle power needs.
- • **Seamless Dual Battery Isolation:** Prevents primary battery drain while powering secondary systems like car audio with precision.
- • **Endurance That Outlasts the Road:** Engineered for 100,000 mechanical cycles, delivering long-lasting, reliable performance.

## Overview

The Stinger SGP35 is a high-current 12V battery relay and isolator designed for vehicles, marine, and powersports applications. It supports up to 500 amps continuous current and 900 amps surge, housed in water-resistant phenolic plastic for superior durability. Compatible with all alternators, it isolates secondary batteries to prevent primary battery drain, extending battery life with a robust 100,000 mechanical cycle rating.

## Description

Made of Water resistant black phenolic plastic, has a 100,000 mechanical cycle life and 500 amp contact rating. Stinger's high current relays are the most efficient and reliable way to add secondary batteries to your system. This new for 2011 item has the highest current handling capability to date. Simply connect these relays to operate when the ignition is turned on. The battery system will remain separate while the ignition is off, preventing system drain. Compatible with all types of alternators and charging systems.

Review: Good buy - Works as described and a good buy
Review: Nice - Nice to have

## Features

- 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗮𝗹 𝟭𝟮𝗩 𝗖𝗼𝗺𝗽𝗮𝘁𝗶𝗯𝗶𝗹𝗶𝘁𝘆: Works with any type of vehicle alternator or charging system.
- 𝗪𝗮𝘁𝗲𝗿-𝗥𝗲𝘀𝗶𝘀𝘁𝗮𝗻𝘁 𝗖𝗼𝗻𝘀𝘁𝗿𝘂𝗰𝘁𝗶𝗼𝗻: Designed with phenolic plastic to protect against moisture damage in marine, powersports, or off-road applications.
- 𝗠𝗮𝘅𝗶𝗺𝘂𝗺 𝗖𝘂𝗿𝗿𝗲𝗻𝘁 𝗧𝗿𝗮𝗻𝘀𝗳𝗲𝗿: Access power on demand up to 500A continuous current and up to 900A surges.
- 𝗜𝗱𝗲𝗮𝗹 𝗳𝗼𝗿 𝗦𝗲𝗰𝗼𝗻𝗱𝗮𝗿𝘆 𝗕𝗮𝘁𝘁𝗲𝗿𝘆 𝗜𝘀𝗼𝗹𝗮𝘁𝗶𝗼𝗻: Prevents primary battery discharge, providing a reliable and efficient way to power your car stereo system or other electrical accessories.
- 𝗘𝘅𝘁𝗲𝗻𝗱𝘀 𝗕𝗮𝘁𝘁𝗲𝗿𝘆 𝗟𝗶𝗳𝗲: Features a 100,000 mechanical cycle life.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004WDPZEW |
| Best Sellers Rank | #44,720 in Automotive ( See Top 100 in Automotive ) #509 in Automotive Switches & Relays #8,303 in Automotive Tools & Equipment |
| Brand | STINGER |
| Brand Name | STINGER |
| Coil Voltage | 12 volts |
| Connector Type | Screw |
| Contact Current Rating | 500 A |
| Contact Material | Copper |
| Contact Type | Electromechanical |
| Current Rating | 500 A |
| Customer Reviews | 4.6 out of 5 stars 679 Reviews |
| Global Trade Identification Number | 00609098800365 |
| Included Components | product, manual |
| Item Type Name | relay |
| Item Weight | 1.7 pounds |
| Manufacturer | Stinger |
| Minimum Switching Voltage | 12 volts_of_direct_current |
| Model | SGP35 |
| Mounting Type | Socket Mount |
| Number of Terminals | 2 |
| Operation Mode | Automatic |
| Part Number | SGP35 |
| UPC | 609098797771 609098800365 |
| Unit Count | 1 count |
| Warranty Description | 1 year |
| Wattage | 6000 watts |

## Product Details

- **Connector Type:** Screw
- **Contact Material:** Copper
- **Contact Type:** Electromechanical
- **Current Rating:** 500 A
- **Mounting Type:** Socket Mount

## Images

![SGP35 High-Current 500A Car Audio Dual Battery Isolator & Relay | Universal compatibility, 100k mechanical cycle life, water-resistant design for marine or powersports stereos & accessories - Image 1](https://m.media-amazon.com/images/I/71de-ff9nCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good buy
*by A***Y on August 22, 2026*

Works as described and a good buy

### ⭐⭐⭐⭐⭐ Nice
*by A***N on April 25, 2026*

Nice to have

### ⭐⭐⭐⭐⭐ Rated for constant duty
*by F***4 on June 16, 2025*

Use this with my 12K winch on my Jeep JLU. Wired to a factory auxiliary switch it offers an extra level of protection and eliminates a high amperage hot wire running though the engine compartment to the front bumper. I bought this brand based on positive reviews and was going to go cheap on an item that could cause a fire if it failed.

## Frequently Bought Together

- Stinger SGP35 500-AMP Relay and Isolator , Black
- 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
- 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)

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**Shop now:** [https://www.desertcart.us/products/10264161-sgp35-high-current-500a-car-audio-dual-battery-isolator-relay](https://www.desertcart.us/products/10264161-sgp35-high-current-500a-car-audio-dual-battery-isolator-relay)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-10*