--- product_id: 6580292 title: "Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK" brand: "stinger" price: "€ 77.70" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.com.cy/products/6580292-stinger-sgp38-80-amp-battery-isolator-and-relay-black store_origin: CY region: Cyprus --- # 80A constant current Water-resistant durability Prevents battery drain Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK **Brand:** stinger **Price:** € 77.70 **Availability:** ✅ In Stock ## Summary > ⚡ Keep your power flowing, never drained, always ready! ## Quick Answers - **What is this?** Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK by stinger - **How much does it cost?** € 77.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/6580292-stinger-sgp38-80-amp-battery-isolator-and-relay-black) ## 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 Last:** Water-resistant black phenolic plastic housing with 100,000 mechanical cycle lifespan - • **Battery Life Guardian:** Prevents primary battery discharge by isolating secondary batteries when ignition is off - • **Effortless Integration:** Simple screw connectors and normally open relay design for easy installation in trucks, RVs, and marine setups - • **Universal 12V Compatibility:** Works seamlessly with all 12V alternators and charging systems - • **Powerful 80A Current Handling:** Handles up to 80 amps constant and 150 amps peak for robust performance ## Overview The Stinger SGP38 is a high-performance 80-AMP battery isolator and relay designed to protect your primary battery from discharge by isolating secondary batteries when the ignition is off. Compatible with all 12V systems, it features a durable, water-resistant design rated for 100,000 mechanical cycles, making it ideal for automotive, RV, truck, and marine applications. ## Description Ideal for battery isolation, Stinger's high current relays are the most reliable and efficient way to add secondary batteries to your system. Compatible with all types of alternators and charging systems, simply connect these relays to operate when the ignition is turned on. The battery systems remain separate while the ignition is off, preventing system drain. Water resistant black phenolic plastic, 100,000 mechanical cycle life. ## Features - 80 AMP Battery Isolator and Relay - Prevents primary battery discharge.80A constant 150A peak - Maximum current transfer - Extends battery life - Universal 12V Applications ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B001HC6UJ0 | | Best Sellers Rank | #124,583 in Automotive (See Top 100 in Automotive) #219 in Automotive Replacement Accessory Power Relays | | Brand Name | STINGER | | Coil Voltage | 12 volts | | Connector Type | Screw | | Contact Current Rating | 80 A | | Contact Material | Silver | | Contact Type | Normally Open | | Current Rating | 80 A | | Customer Reviews | 4.7 4.7 out of 5 stars (1,512) 4.7 out of 5 stars | | Global Trade Identification Number | 00609098796026 | | Included Components | Relay^Manual | | Item Highlight | Protects starting charge while running car audio, automatic switching to auxiliary bank, suits truck RV and marine setups | | Item Type Name | Battery Relay | | Item Weight | 0.27 g | | Manufacturer | Stinger | | Maximum Switching Current | 80 A | | Maximum Switching Voltage | 12 volts | | Minimum Switching Voltage | 12 volts_of_direct_current | | Model | SGP38 | | Mounting Type | Limited mount | | Number Of Items | 1 | | Number Of Terminals | 2 | | Operation Mode | Off | | Part Number | SGP38 | | Unit Count | 1 Count | | Upc | 609098796026 | | Warranty Description | 1 YR Manufacture | | Wattage | 960 watts | ## Product Details - **Connector Type:** Screw - **Contact Material:** Silver - **Contact Type:** Normally Open - **Current Rating:** 80 Amps - **Mounting Type:** Limited mount ## Images ![Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK - Image 1](https://m.media-amazon.com/images/I/51P4ak4MFvL.jpg) ![Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK - Image 2](https://m.media-amazon.com/images/I/71Wec3EAWpL.jpg) ![Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK - Image 3](https://m.media-amazon.com/images/I/61xzK18IWcL.jpg) ![Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK - Image 4](https://m.media-amazon.com/images/I/61LpQ+rC2+L.jpg) ## Available Options This product comes in different **Product Packaging, Style** options. ## Questions & Answers **Q: Will this isolator be able to handle a mech man 350amp ho alternator feeding two rockford fosgate 1,000 monoblock amps at 1 ohm with two kinetic batte** A: 85amps to each 1000watt amplifier is plenty..... you want 14.4 volts steady.... i would start with a capacitor before this?? Is someone messing with me??? i am the only one that gets this... besides the man asking the question???? why is it wired for a full OHM? It should be fine at a half OHM!! **Q: Will this work on my fishing boat? I have two batteries..** A: Most boats will have a battery selector switch. #1 battery, #2 battery, Both batteries. If you do not have a selector switch this can be used to charge both batteries while the engine runs, but with the engine off you can draw down one (stereo, trolling motor, etc.) while still not affecting your ability to start with the other battery. How the batteries are wired (in parallel) will determine how your system operates. To use this relay you need to split the system, for example 1 house battery, 1 starting battery. The manual switch will still give you more control over your system, if you remember to use it. **Q: Isolator becomes hot after a about 30 minutes of activation.** A: There is no question mark here so there is no answer...only questions. The device is a relay, the 12-volt coil is the only constant heat producer and, if energized by 12-volts, should not generate much heat. The capacity, 80-amps, is a maximum for the relay contacts and connections, exceeding it or maintaining it constantly might generate some heat. If the device is mounted near the engine, or in the sun, it could be warm from the environment. What is "hot." Are all the connections tight? Is the load near the maximum 80-amps? Is the coil seeing more than 12-volts? Are the wires involved in the 80-amp circuit gauged large enough to handle the current? And, you may have a faulty device. **Q: Will this allow the alternator to charge main and auxilary battery while car is on ??** A: Yes. Properly installed the device separates the main battery from the auxiliary battery when the engine is off. When on, both batteries are charged. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Stringer *by on Reviewed in the United States November 16, 2025* Great product. Works like a champ ### ⭐⭐⭐⭐⭐ dual battery set up *by on Reviewed in the United States December 26, 2024* Added a second battery to my fj cruiser and wanted to isolate the house battery when the engine was off so that my starting battery would be fresh to start, this is well made and works perfect.I added a switch inside the cab so that I can also shut off manually ### ⭐⭐⭐⭐⭐ Nice! *by on Reviewed in the United States May 23, 2014* This wasn't exactly what I was looking for but it does the job and does it well. I was looking for an isolator and this doesn't really isolate the batteries until the ignition is off. I also installed this in a boat that doesn't have a true ignition source. ( push button start with a sealed switch that I couldn't break into ) I ended up running a small wire from the battery to a switch on the dash then to the isolator. I hit the switch to activate the relay.There is very little info anywhere on how this works so maybe I can help some future buyers. It is simply a relay swith. One large power wire from charging source to first battery, then another large wire from that same post to one of the top posts on the isolator/relay. Lastly you run a large power wire from the 2nd top post of the relay to the second battery. When you turn on your ignition it sends power to the unit which engages the relay completing the circuit between the two batteries, thus connecting them and simultaneously charging them. Turn ignition off and the relay disengages making it impossible for one battery to drain the other but also makes the second battery unable to be charged. ( why it needs to be a true ignition source ) ## Frequently Bought Together - Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK - TRUE® UTV-SBI-CM UTV Dual Battery Connect & Monitor Kit - Mighty Max Battery ML26-12 12V 26AH Replacement Battery for UB12260-ER --- ## 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.com.cy/products/6580292-stinger-sgp38-80-amp-battery-isolator-and-relay-black](https://www.desertcart.com.cy/products/6580292-stinger-sgp38-80-amp-battery-isolator-and-relay-black) --- *Product available on Desertcart Cyprus* *Store origin: CY* *Last updated: 2026-09-07*