--- title: "battery isolator — Niche Verdict: Skip it (53/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/battery-isolator" last_updated: "2026-07-10T01:28:53.055Z" locale: en meta: description: "a small market ($392K/yr) — battery isolator doesn't clear our bar today." "og:description": "a small market ($392K/yr) — battery isolator doesn't clear our bar today." "og:title": "battery isolator — Niche Verdict: Skip it (53/100) | Amazon United States - Flapen" --- Back to Flapen home # **battery isolator** **Skip it****53/100 ** a small market ($392K/yr) — battery isolator doesn't clear our bar today. **Market/yr** **$392K** **Growth (1y)** **+176.4%** **Products** **30** **Brands** **15** was 23 a year ago **Sellers** **60** **Price range** **$14.43–$179.04** **Returns** **3.7%** **Rating** **4.4★** **Skip it** Scored 53/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **20** ×0.30 Growth **74** ×0.30 Competition **62** ×0.20 Quality gap **54** ×0.10 Returns **70** ×0.10 ## **Demand** Weekly Amazon search volume, last 104 weeks — +176.4% year over year. 7K3KSpike '25Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND No pronounced peak months · busiest ÷ quietest = 1.5× ## **Competition** - VEVOR24% - Nilight16% - UCkasayfy16% - KeyLine Chargers13% - NVX7% - STINGER6% - Other (9 brands)18% The top 5 products take 48% of clicks — established leaders, but buyers still shop beyond them. 15 brands and 60 sellers compete here. **Brands** **15 **▼falling was 23 a year ago **Sellers** **60** **Top 5 brand share** **75%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![VEVOR Split Charge Relay Kit 6mtr 12V Automatic Dual Battery Isolator Kit with 140AMP Voltage Sense Relay VSR Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats Workshop](https://m.media-amazon.com/images/I/41UNO6O3BRL.jpg) [**VEVOR Split Charge Relay Kit 6mtr 12V Automatic Dual Battery Isolator Kit with 140AMP Voltage Sense Relay VSR Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats Workshop**](https://www.amazon.com/dp/B0CY2C3NMZ) VEVOR$49.124.4★49719%▼falling 2 ![Nilight 12V 140 AMP Dual Battery Isolator Auto Manual Voltage Sensitive Relay with Digital Voltmeter Smart VSR Automatic Charger Disconnect w/Voltmeter for Truck RV UTV Boat Can Am](https://m.media-amazon.com/images/I/41nK2N5GyAL.jpg) [**Nilight 12V 140 AMP Dual Battery Isolator Auto Manual Voltage Sensitive Relay with Digital Voltmeter Smart VSR Automatic Charger Disconnect w/Voltmeter for Truck RV UTV Boat Can Am**](https://www.amazon.com/dp/B0CZN1N411) Nilight$24.264.2★2999%▲rising 3 ![Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup](https://m.media-amazon.com/images/I/41l+WSiaSiL.jpg) [**Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup**](https://www.amazon.com/dp/B00WTAFR5W) KeyLine Chargers$113.154.5★1,1258%▼falling 4 ![UCkasayfy Dual Battery Isolator Kit 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries](https://m.media-amazon.com/images/I/51GI8vxAhiL.jpg) [**UCkasayfy Dual Battery Isolator Kit 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries**](https://www.amazon.com/dp/B0DLWCQZXS) UCkasayfy$47.924.3★1096%▲rising 5 ![Nilight 12V 140AMP Dual Battery Isolator Kit with 6 AWG Power Cable Terminal Voltage Sensitive Relay Smart VSR Automatic Charger Disconnect for Truck Van RV ATV UTV Boat Can Am](https://m.media-amazon.com/images/I/51WCPjlUHjL.jpg) [**Nilight 12V 140AMP Dual Battery Isolator Kit with 6 AWG Power Cable Terminal Voltage Sensitive Relay Smart VSR Automatic Charger Disconnect for Truck Van RV ATV UTV Boat Can Am**](https://www.amazon.com/dp/B0CZMXN5SK) Nilight$92.514.2★2995%▲rising 6 ![RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay](https://m.media-amazon.com/images/I/31AaqtjjPKL.jpg) [**RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay**](https://www.amazon.com/dp/B08GPJG9K2) RECOIL$53.334.5★2995%▲rising 7 ![UCkasayfy Dual Battery Isolator 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries](https://m.media-amazon.com/images/I/51mEeN4mDmL.jpg) [**UCkasayfy Dual Battery Isolator 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries**](https://www.amazon.com/dp/B0DLWBMGZJ) UCkasayfy$21.583.9★735%▲rising 8 ![UCkasayfy Dual Battery Isolator 12V 140Amp Voltage Sensitive Relay VSR Compatible with UTV Marine Car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries](https://m.media-amazon.com/images/I/41ZtMLuF9ML.jpg) [**UCkasayfy Dual Battery Isolator 12V 140Amp Voltage Sensitive Relay VSR Compatible with UTV Marine Car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries**](https://www.amazon.com/dp/B093T2T1CP) UCkasayfy$19.534.4★2685%▲rising 9 ![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](https://m.media-amazon.com/images/I/41yBXsdS38L.jpg) [**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**](https://www.amazon.com/dp/B001HBYXVS) STINGER$61.604.6★1,5575%▼falling 10 ![NVX BIR500 500 AMP Battery Relay Isolator and Relay for Cars RVs ATVs UTVs and Boats.](https://m.media-amazon.com/images/I/41YDG88jOML.jpg) [**NVX BIR500 500 AMP Battery Relay Isolator and Relay for Cars RVs ATVs UTVs and Boats.**](https://www.amazon.com/dp/B00KMBKWZ0) NVX$80.744.5★3984%—flat 11 ![500 Amp Battery Isolator for Mobile Audio Relay Continuous Battery Isolator Relay Kit 12v 500A](https://m.media-amazon.com/images/I/412CNKoUrxL.jpg) [**500 Amp Battery Isolator for Mobile Audio Relay Continuous Battery Isolator Relay Kit 12v 500A**](https://www.amazon.com/dp/B082HMDMLG) KanSmart$38.954.0★3923%▲rising 12 ![Smart Dual Battery Isolator 12V 140A Auto or Manual Control Waterproof Voltage Sensitive Relay(VSR) with Digital Voltmeter for Car RV ATV UTV Boat Marine](https://m.media-amazon.com/images/I/41XRpotAqKL.jpg) [**Smart Dual Battery Isolator 12V 140A Auto or Manual Control Waterproof Voltage Sensitive Relay(VSR) with Digital Voltmeter for Car RV ATV UTV Boat Marine**](https://www.amazon.com/dp/B0D147R21S) POWO Carlife$23.014.6★1132%▼falling 13 ![Dual Battery Isolator Kit Heavy Duty 300 AMP 1000 AMP Peak Voltage Sensitive Relay VSR for 12 Volt Systems - Works with All Batteries Types Including Lithium and LiFePO4](https://m.media-amazon.com/images/I/51185+JPrHL.jpg) [**Dual Battery Isolator Kit Heavy Duty 300 AMP 1000 AMP Peak Voltage Sensitive Relay VSR for 12 Volt Systems - Works with All Batteries Types Including Lithium and LiFePO4**](https://www.amazon.com/dp/B08TM748F8) KeyLine Chargers$179.044.4★632%▲rising 14 ![Stinger SGP35 High Current 500-Amp Battery Relay & Isolator for Most Vehicles Water-Resistant Design for Marine & Powersports Handles up to 900A Surges Dual Battery Isolator for Car Audio Systems](https://m.media-amazon.com/images/I/41HBTxViHWL.jpg) [**Stinger SGP35 High Current 500-Amp Battery Relay & Isolator for Most Vehicles Water-Resistant Design for Marine & Powersports Handles up to 900A Surges Dual Battery Isolator for Car Audio Systems**](https://www.amazon.com/dp/B004WDPZEW) STINGER$97.164.6★6692%—flat 15 ![Nilight 12V 140AMP Dual Battery Isolator Voltage Sensitive Relay Smart VSR Dual Battery Automatic Charger Relays Auto Disconnect Switch Waterproof for Truck Van RV ATV UTV Boat Can Am](https://m.media-amazon.com/images/I/41QawC0vchL.jpg) [**Nilight 12V 140AMP Dual Battery Isolator Voltage Sensitive Relay Smart VSR Dual Battery Automatic Charger Relays Auto Disconnect Switch Waterproof for Truck Van RV ATV UTV Boat Can Am**](https://www.amazon.com/dp/B0CZMX87ZJ) Nilight$20.354.2★2992%▼falling **~~Showing 15 of 30 — show all ~~** ## **Product shelf** All 30 tracked products in this niche. Top sellersNewestTrending [![VEVOR Split Charge Relay Kit 6mtr 12V Automatic Dual Battery Isolator Kit with 140AMP Voltage Sense Relay VSR Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats Workshop](https://m.media-amazon.com/images/I/41UNO6O3BRL.jpg)**VEVOR Split Charge Relay Kit 6mtr 12V Automatic Dual Battery Isolator Kit with 140AMP Voltage Sense Relay VSR Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats Workshop** VEVOR**$49.12**4.4★497 reviews](https://www.amazon.com/dp/B0CY2C3NMZ) [![Nilight 12V 140 AMP Dual Battery Isolator Auto Manual Voltage Sensitive Relay with Digital Voltmeter Smart VSR Automatic Charger Disconnect w/Voltmeter for Truck RV UTV Boat Can Am](https://m.media-amazon.com/images/I/41nK2N5GyAL.jpg)**Nilight 12V 140 AMP Dual Battery Isolator Auto Manual Voltage Sensitive Relay with Digital Voltmeter Smart VSR Automatic Charger Disconnect w/Voltmeter for Truck RV UTV Boat Can Am** Nilight**$24.26**4.2★299 reviews](https://www.amazon.com/dp/B0CZN1N411) [![Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup](https://m.media-amazon.com/images/I/41l+WSiaSiL.jpg)**Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup** KeyLine Chargers**$113.15**4.5★1,125 reviews](https://www.amazon.com/dp/B00WTAFR5W) [![UCkasayfy Dual Battery Isolator Kit 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries](https://m.media-amazon.com/images/I/51GI8vxAhiL.jpg)**UCkasayfy Dual Battery Isolator Kit 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries** UCkasayfy**$47.92**4.3★109 reviews](https://www.amazon.com/dp/B0DLWCQZXS) [![Nilight 12V 140AMP Dual Battery Isolator Kit with 6 AWG Power Cable Terminal Voltage Sensitive Relay Smart VSR Automatic Charger Disconnect for Truck Van RV ATV UTV Boat Can Am](https://m.media-amazon.com/images/I/51WCPjlUHjL.jpg)**Nilight 12V 140AMP Dual Battery Isolator Kit with 6 AWG Power Cable Terminal Voltage Sensitive Relay Smart VSR Automatic Charger Disconnect for Truck Van RV ATV UTV Boat Can Am** Nilight**$92.51**4.2★299 reviews](https://www.amazon.com/dp/B0CZMXN5SK) [![RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay](https://m.media-amazon.com/images/I/31AaqtjjPKL.jpg)**RECOIL 500 Amp Mobile Audio Battery Isolator and High Current Starter Relay** RECOIL**$53.33**4.5★299 reviews](https://www.amazon.com/dp/B08GPJG9K2) [![UCkasayfy Dual Battery Isolator 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries](https://m.media-amazon.com/images/I/51mEeN4mDmL.jpg)**UCkasayfy Dual Battery Isolator 12V 140amp Voltage Sensitive Relay VSR Smart Battry Isolator Compatible with UTV Marine car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries** UCkasayfy**$21.58**3.9★73 reviews](https://www.amazon.com/dp/B0DLWBMGZJ) [![UCkasayfy Dual Battery Isolator 12V 140Amp Voltage Sensitive Relay VSR Compatible with UTV Marine Car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries](https://m.media-amazon.com/images/I/41ZtMLuF9ML.jpg)**UCkasayfy Dual Battery Isolator 12V 140Amp Voltage Sensitive Relay VSR Compatible with UTV Marine Car RV Boat Truck Trailer ATV Camper Moto Not Fit for Lithium Batteries** UCkasayfy**$19.53**4.4★268 reviews](https://www.amazon.com/dp/B093T2T1CP) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Quality-Overall**19% *“Decent quality”* **Assembly/Installation**15% *“once installed works great”* **Advertised Vs Actual Product**14% *“works just as it should”* **Battery Life**13% *“This battery isolator kit performs exceptionally well”* **Efficiency**8% *“Does the job perfectly”* **Value For Money**7% *“Good for the price”* **Durability**3% *“seems pretty durable”* **Connectivity-Overall**3% *“Hooked up fine”* **Charging**2% *“Charges like it should”* **Ease Of Use**2% *“Simple to use”* ### **What buyers complain about ** **Durability**13% *“Not for the long run”* **Instructions/User Manual/Troubleshooting**10% *“No Installation Instructions”* **Battery Life**10% *“Doesn't work how you expect - drains battery constantly”* **Quality-Overall**8% *“Poor Quality”* **Functionality-Overall**8% *“Doesn't work how you expect”* **Defective Material/Parts**7% *“This item is not work at all”* **Charging**6% *“no charge points on this”* **Size-Overall**5% *“The heat shrink sleeves could be a little bigger”* **Assembly/Installation**3% *“Kinda of a pain to install”* **Value For Money**3% *“too expensive”* #### **Top return reasons**- Functionality-Overall17% - Defective Material/Parts16% - Size-Overall15% - Compatibility-Overall9% - Advertised Vs Actual Product6% - Amplification6% - Charging5% - Assembly/Installation4% - Product Condition3% - Value For Money3%