---
product_id: 444352982
title: "Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries"
brand: "uckasayfy"
price: "6258 kr"
currency: ISK
in_stock: true
reviews_count: 8
url: https://www.desertcart.is/products/444352982-split-charge-relay-12v-140amp-voltage-sensitive-relay-vsr-compatible
store_origin: IS
region: Iceland
---

# 140A max current IP67 waterproof rating Voltage sensitive cut-in/out Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries

**Brand:** uckasayfy
**Price:** 6258 kr
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your adventure with seamless dual battery control!

## Quick Answers

- **What is this?** Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries by uckasayfy
- **How much does it cost?** 6258 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/444352982-split-charge-relay-12v-140amp-voltage-sensitive-relay-vsr-compatible)

## Best For

- uckasayfy enthusiasts

## Why This Product

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

## Key Features

- • **Universal Compatibility:** Perfect for trucks, RVs, boats, campers, and off-road vehicles—your all-in-one power partner.
- • **Peace of Mind Guaranteed:** Crafted with precision and backed by dedicated after-sales support for worry-free use.
- • **Emergency Reverse Charging:** Auxiliary battery can power your main battery when it’s drained—never get stranded.
- • **Built to Brave the Elements:** IP67 waterproof and silicone-sealed for ultimate durability in extreme conditions.
- • **Smart Dual Battery Management:** Automatically switches at 13.3V to keep your primary battery charged and ready.

## Overview

The UCkasayfy 12V 140Amp Voltage Sensitive Relay (VSR) is a rugged, IP67 waterproof dual battery isolator designed to automatically manage and protect your vehicle’s batteries. Compatible with trucks, RVs, marine vessels, and off-road campers, it ensures efficient parallel charging and emergency reverse charging, keeping your power systems reliable in any environment. Not suitable for lithium batteries.

## Description

Full description not available

## Features

- 【Function】——Voltage Sensitive Relay(VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to run your vehicle. The dual battery isolator allows parallel charging of both batteries
- 【Secure & Effective】——The dual battery relay is made from high - quality materials and its interior is sealed with silicone, enabling it to endure extreme conditions. IP67 waterproof rating helps smart battery isolator perform well in extreme environments
- 【Wide Compatibility】——This vsr split charge relay is suitable for almost anywhere, for ATV, UTV, Boats, RV, marine, vehicle, truck and caravan. 140amp battery isolator is very usefu for storing sports cars and trailers to protect batteries from drained
- 【Emergency Condition】——The campervan split charger can reverse charge. For example, when the main battery is out of power, connect the circuit, the auxiliary battery can charge the main one in reverse. When connecting accessories to your second battery ensure they are fused within 0.98FT
- 【After-sales Service】——We have exquisite craft, strict quality control along with excellent after-sales service. That is why our products are worthy of your purchase

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | UCkasayfy |
| Part number | UK-BR001-12V-1 |
| Item Weight | 220 g |
| Package Dimensions | 7.8 x 7.6 x 6.7 cm; 220 g |
| Manufacturer reference | UK-BR001-12V-1 |
| Style | 12V VSR |
| Plug profile | Boat Mount |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Connector type:** Screw
- **Contact material:** Copper Alloy
- **Contact type:** Normally Open
- **Current rating:** 140 Amps
- **Mounting type:** Boat Mount

## Images

![Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries - Image 1](https://m.media-amazon.com/images/I/71gmOSvyCQL.jpg)
![Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries - Image 2](https://m.media-amazon.com/images/I/81epMgX4-BL.jpg)
![Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries - Image 3](https://m.media-amazon.com/images/I/817m874mg+L.jpg)
![Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries - Image 4](https://m.media-amazon.com/images/I/71SjQ-W8sfL.jpg)
![Split Charge Relay 12V 140Amp, Voltage Sensitive Relay VSR,Compatible with Truck RV Marine Car Vehicles Caravan Off-road Camper Yacht，Not Fit for lithium batteries - Image 5](https://m.media-amazon.com/images/I/818AJBk9TJL.jpg)

## Available Options

This product comes in different **Style Name** options.

## Questions & Answers

**Q: What fuse size do you recommend?**
A: It is recommended to configure 60A-80A fuse, if you think it is too low, you can also configure 100A fuse by yourself.

**Q: Does it work with solar chargers?**
A: Yes. As long as the voltage of one battery reaches 13.3V, the isolator will start working and connect the two batteries. If you have any questions regarding the circuit design, we can offer one-on-one service.

**Q: Can I use this isolator with lithium batteries?**
A: 1. The main battery and the auxiliary battery are all lithium batteries. This isolator can be used.

**Q: The product is installed but not working, what could be the reason?**
A: 1. Check the voltage of the main battery has reached 13.3V.

**Q: What is the reason for the continuity, rhythmic lighting and extinction of the indicator lights of the product's work?**
A: This is a normal phenomenon, the reason is that the voltage difference between the main battery and the secondary battery is too large. Generally after charging for a period of time, this phenomenon will disappear.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Well built, good product.
*by J***O on 24 January 2025*

Over the year I have used two of these Adjustable Voltage Sensitive Relays. They are well built, easily programmed and function accurately. Have not tried with high currents but the relays switch 30 amps perfectly. Very pleased with the product.EDIT -I note a misleading review (USA) criticising the small gauge of the supplied fixed black cable. This black cable only supplies the negative reference for the onboard programming circuitry and is perfectly adequate. Your positive IN supply, and the positive switched current OUT, are bolted to the large terminals using your own cables, both of which should be of a size suitable for the current load.

### ⭐⭐⭐⭐⭐ Great product
*by P***D on 25 August 2024*

Very quick and easy set up and works perfectly

### ⭐⭐⭐⭐ Perfect split charge relay, with very handy push button override function.
*by S***S on 6 November 2022*

Perfect split charge relay, that give the user the ability to manually connect the 2 battery's in use, inserted, to allow you to jump you vehicle from you leisure battery, without jump leads, in an emergency.

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**Shop now:** [https://www.desertcart.is/products/444352982-split-charge-relay-12v-140amp-voltage-sensitive-relay-vsr-compatible](https://www.desertcart.is/products/444352982-split-charge-relay-12v-140amp-voltage-sensitive-relay-vsr-compatible)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-02*