---
product_id: 641295105
title: "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"
brand: "nilight"
price: "S/.169"
currency: PEN
in_stock: true
reviews_count: 10
category: "Nilight"
url: https://www.desertcart.pe/products/641295105-nilight-12v-140-amp-dual-battery-isolator-auto-manual-voltage
store_origin: PE
region: Peru
---

# 140 AMP high current capacity Real-time digital voltmeter display IP66 waterproof & dustproof 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

**Brand:** nilight
**Price:** S/.169
**Availability:** ✅ In Stock

## Summary

> 🔌 Power your journey with smart dual-battery control—never get stranded, always stay charged!

## Quick Answers

- **What is this?** 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 by nilight
- **How much does it cost?** S/.169 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/641295105-nilight-12v-140-amp-dual-battery-isolator-auto-manual-voltage)

## Best For

- nilight enthusiasts

## Why This Product

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

## Key Features

- • **Universal Adventure Ready:** Perfect for trucks, RVs, UTVs, boats, and camper vans—power your accessories without draining your starter battery.
- • **Dual Battery Power Mastery:** Simultaneously charges two batteries from one alternator, ensuring your main battery is always ready to start.
- • **Built for Extreme Conditions:** Rugged silicone-sealed casing with IP66 rating guarantees durability in off-road, marine, and harsh environments.
- • **Smart Voltage Sensitive Relay:** Automatically connects/disconnects at 13.3V/12.8V to protect battery health and optimize charging.
- • **Instant Battery Status Insight:** Integrated LED voltmeter provides real-time voltage monitoring so you never guess your battery health.

## Overview

The Nilight 12V 140 AMP Dual Battery Isolator is a smart voltage sensitive relay designed to charge two batteries simultaneously from a single alternator. Featuring a robust IP66 waterproof casing and real-time digital voltmeter, it ensures reliable battery management for trucks, RVs, UTVs, and boats. Automatic operation protects battery health by engaging at 13.3 volts and disconnecting at 12.8 volts, making it an essential upgrade for off-road and marine power systems.

## Description

Buy 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: Battery Switches - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Very nice! - Very effective and for the price, you can't go wrong. Works in BOTH directions. As in, if either source goes above 13.3 volts it will join them.
Review: As always make sure to have a good clean ground connection - Works just as advertised.. it seems not quite designed for heavier gauge cables, as far as physical space to secure them, etc.. , yet otherwise works great and exactly as advertised.

## Features

- Function: The Voltage Sensitive Relay (VSR) ensures that the primary battery is always charged and ready to start the vehicle by cutting in at 13.3 volts and cutting out at 12.8 volts. When your engine is turned on and the starting battery is fully charged, the isolation will start charging the second (auxiliary) battery at the same time. Enables you to charge two batteries from one alternator at the same time.
- Safe and efficient: The dual battery isolator is made of high-quality material casing and a silicone seal, withstanding extreme weather conditions and vibrations. Its IP66 waterproof rating ensures safe off-road use in dusty, wet, and unpredictable environments, providing you with a reliable and durable solution for your marine or automotive dual battery needs.
- Wide Application: Like Having Two Separate Power Sources, The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While keeping your Main Battery Charged and Your Vehicle Always Ready to Go and Start When You Want It. Suitable for 12v camper van trucks, caravans, RV, ATV, UTV, Boat and camping applications.
- Real-time voltage display: The Dual Battery Isolator 12V 140 AMP is equipped with an LED display that shows the current voltage status in real-time so that you can check the battery status at any time. Important Note: This item is not compatible with Lithium Batteries
- Package Includes: 140amp smart battery isolator with voltage display; Mounting Hardware(screws, nuts, spring washers, ring terminal).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CZN1N411 |
| Best Sellers Rank | #11,721 in Automotive ( See Top 100 in Automotive ) #28 in Automotive Replacement Battery Switches |
| Brand | Nilight |
| Circuit Type | 2-way |
| Color | 140 Amp w/Voltmeter |
| Connector Type | Quick Connect |
| Contact Material | Aluminum |
| Contact Type | Normally Open |
| Control Method | Sensor |
| Current Rating | 140 Amps |
| Customer Reviews | 4.3 4.3 out of 5 stars (236) |
| Date First Available | April 2, 2024 |
| Item Weight | 11.6 ounces |
| Item dimensions L x W x H | 2 x 2 x 1 inches |
| Item model number | 90333A |
| Manufacturer | Nilight |
| Manufacturer Part Number | 90333A |
| Number of Items | 1 |
| Operating Voltage | 12 Volts |
| Operation Mode | Automatic |
| Product Dimensions | 2 x 2 x 1 inches |
| Terminal | Screw |
| UPC | 840323914352 |
| Unit Count | 1.0 Count |
| Wattage | 1680 watts |

## Product Details

- **Brand:** Nilight
- **Connector Type:** Quick Connect
- **Contact Type:** Normally Open
- **Current Rating:** 140 Amps
- **Item dimensions L x W x H:** 2 x 2 x 1 inches
- **Material:** Metal, Plastic
- **Operating Voltage:** 12 Volts
- **Operation Mode:** Automatic
- **Switch Type:** Relay
- **Terminal:** Screw

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/714KywtvgkL.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 - Image 2](https://m.media-amazon.com/images/I/71X4X-ZYrdL.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 - Image 3](https://m.media-amazon.com/images/I/71d5SzagyKL.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 - Image 4](https://m.media-amazon.com/images/I/71hYKHcx98L.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 - Image 5](https://m.media-amazon.com/images/I/71kHiHrJqAL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very nice!
*by B***M on January 5, 2026*

Very effective and for the price, you can't go wrong. Works in BOTH directions. As in, if either source goes above 13.3 volts it will join them.

### ⭐⭐⭐⭐⭐ As always make sure to have a good clean ground connection
*by D***R on January 5, 2026*

Works just as advertised.. it seems not quite designed for heavier gauge cables, as far as physical space to secure them, etc.. , yet otherwise works great and exactly as advertised.

### ⭐⭐⭐⭐⭐ Great product
*by A***R on January 15, 2026*

Nice little battery. Very powerful without taking up a lot of space

## Frequently Bought Together

- 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
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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-02-04*