--- product_id: 10263753 title: "Stinger SGP32 High Current 200-Amp Battery Relay & Isolator for Most Vehicles, Water-Resistant Design for Marine & Powersports, Handles up to 500A Surges, Dual Battery Isolator for Car Audio Systems" brand: "stinger" price: "¥20332" currency: JPY in_stock: true reviews_count: 13 category: "Stinger" url: https://www.desertcart.jp/products/10263753-stinger-sgp32-high-current-200-amp-battery-relay-and-isolator store_origin: JP region: Japan --- # 200 AMP constant current Water-resistant phenolic casing 100,000 mechanical cycle life Stinger SGP32 High Current 200-Amp Battery Relay & Isolator for Most Vehicles, Water-Resistant Design for Marine & Powersports, Handles up to 500A Surges, Dual Battery Isolator for Car Audio Systems **Brand:** stinger **Price:** ¥20332 **Availability:** ✅ In Stock ## Summary > 🔌 Stay charged, stay unstoppable — power your dual battery system like a pro! ## Quick Answers - **What is this?** Stinger SGP32 High Current 200-Amp Battery Relay & Isolator for Most Vehicles, Water-Resistant Design for Marine & Powersports, Handles up to 500A Surges, Dual Battery Isolator for Car Audio Systems by stinger - **How much does it cost?** ¥20332 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/10263753-stinger-sgp32-high-current-200-amp-battery-relay-and-isolator) ## 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 - • **Dual Battery Defense:** Prevents primary battery drain by isolating secondary battery when idle - • **Battery Life Maximizer:** Extends battery lifespan with an industry-leading 100,000 mechanical cycles - • **Marine & Automotive Ready:** Water-resistant design ideal for boats, trucks, and off-grid setups - • **Universal 12V Compatibility:** Seamlessly integrates with all alternators and charging systems - • **Power on Demand, Always Ready:** Delivers up to 500 AMP peak current for instant high-power needs ## Overview The Stinger SGP32 is a robust 12V battery relay isolator designed to handle 200 AMP continuous and 500 AMP peak currents. Its water-resistant black phenolic plastic housing ensures durability in marine and automotive environments. With a remarkable 100,000 mechanical cycle lifespan, it reliably isolates secondary batteries to prevent primary battery drain, optimizing power management for dual battery systems across all alternators and charging setups. ## Description 200 AMP Battery Isolator and Relay 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 - 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 200A continuous current and up to 500A 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 | B001HBYXVS | | Best Sellers Rank | #30,070 in Automotive ( See Top 100 in Automotive ) #25 in Automotive Replacement Accessory Power Relays | | Brand Name | STINGER | | Coil Voltage | 12 Volts | | Connector Type | Screw | | 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 (1,543) | | Global Trade Identification Number | 00609098796019, 00609098797788 | | Included Components | Stinger | | Item Type Name | SGP32 | | Item Weight | 1.4 Pounds | | Manufacturer | Stinger | | Maximum Switching Current | 1 Amps | | Maximum Switching Voltage | 12 Volts | | Minimum Switching Voltage | 12 Volts | | Model | SGP32 | | Mounting Type | Chassis Mount | | Operation Mode | Automatic | | Part Number | SGP32 | | UPC | 609098797788 609098796019 | | Unit Count | 1.0 Count | | Warranty Description | 1 year | | Wattage | 12 watts | ## Product Details - **Connector Type:** Screw - **Contact Material:** Copper - **Contact Type:** Normally Open - **Current Rating:** 200 Amps - **Mounting Type:** Chassis Mount ## Images ![Stinger SGP32 High Current 200-Amp Battery Relay & Isolator for Most Vehicles, Water-Resistant Design for Marine & Powersports, Handles up to 500A Surges, Dual Battery Isolator for Car Audio Systems - Image 1](https://m.media-amazon.com/images/I/71U91yrL3BL.jpg) ## Available Options This product comes in different **Customer Package Type, Style** options. ## 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. ### ⭐⭐⭐⭐⭐ Must have for dual batteries *by R***J on February 5, 2026* I installed two batteries in my truck and I needed this. It was very easy to set it up came with instructions so installing was not a problem it did extend the life of my batteries by keeping in separated. It wasn’t expensive and a voltage range always kept it around 14.1 V when the alternator was put out 14.3. ## 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.jp/products/10263753-stinger-sgp32-high-current-200-amp-battery-relay-and-isolator](https://www.desertcart.jp/products/10263753-stinger-sgp32-high-current-200-amp-battery-relay-and-isolator) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-17*