---
product_id: 473753224
title: "Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit)"
brand: "ampper"
price: "₩48971"
currency: KRW
in_stock: true
reviews_count: 13
category: "Ampper"
url: https://www.desertcart.kr/products/473753224-ampper-battery-disconnect-switch-12v-48v-marine-battery-switch-disconnect
store_origin: KR
region: South Korea
---

# 1250A momentary surge 275A continuous power 4 copper lugs + wrench kit Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit)

**Brand:** ampper
**Price:** ₩48971
**Availability:** ✅ In Stock

## Summary

> 🔌 Master your power. Disconnect with confidence.

## Quick Answers

- **What is this?** Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit) by ampper
- **How much does it cost?** ₩48971 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/473753224-ampper-battery-disconnect-switch-12v-48v-marine-battery-switch-disconnect)

## Best For

- ampper enthusiasts

## Why This Product

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

## Key Features

- • **Safety First Design:** ABS housing with insulated rear cover prevents shorts and protects your investment.
- • **Cut Power, Cut Worries:** Easily isolate your battery to eliminate power drain and extend battery life during storage.
- • **Power Through Anything:** Handles up to 275A continuous and 1250A surge—built for serious electrical demands.
- • **Universal Compatibility:** Works seamlessly with 12V to 48V systems—perfect for cars, RVs, boats, and more.
- • **All-in-One Installation Kit:** Includes copper lugs, bolts, heat shrink tubing, and wrench—everything you need to install hassle-free.

## Overview

The Ampper Battery Disconnect Switch is a heavy-duty, ABS-encased rotary switch designed for 12V to 48V DC systems. Rated for 275A continuous and 1250A momentary current, it safely isolates batteries in cars, RVs, and boats to prevent power drain. The kit includes copper lugs, mounting bolts, heat shrink tubing, and a wrench for easy installation, making it a reliable, universal solution to protect and extend battery life.

## Description

Ampper battery switch, battery power master switch disconnect isolator for car, vehicle, Rv and boat. Specifications: 1, ABS plastic housing, durable made for safety use. 2, Rear cover insulates terminals against any short of circuits. 3, On/Off 2 positions. 4, Copper terminal studs with nuts and washers. 5, 4 mounting screw holes. 6, 275 A continuous at DC 12V, 455 A Intermittent at DC 12V, 1250 A momentary at DC 12V. 7, Used for DC 12 - 48V systems to isolate and secure the electrical system. 8, Can stand alone or be locked together with other switch. 9, Eliminate any power draw from the battery when vehicle or boat is not in use. 10, Disconnects the battery safely. 11, Universal used for Car, Vehicle, RV and Boat. 12, Used as electrical equipment's switch. 13, Size: 2.68" x 2.68" x 3.07". Complete kits includes: 1 x battery switch. 4 sets of mounting bolts. 4 pcs 2x3/8" copper lugs. A wrench. 4 pcs heat shrink tubing.

Review: Eliminate pesky power vampires with this sturdy switch. - You can spend hours or lots of money trying to find every power vampire in your RV. I spent two seasons with my battery always being completely dead when I came back to my RV despite all my attempts to get them all shut off. Then after the second season, my battery would no longer take a charge. My RV dealer suggested a cutoff switch and after some investigation, I went with this one. There are other cheaper and simpler options out there but I wanted something convenient, safe, and durable. This switch really fits the bill nicely. It's very well made and uses high-grade plastics. The switch has a very solid feel, it's easy to know if you are switch on or off. First, there aren't any instructions with this switch, they're mostly here on this page. What you will need to install it is an extra battery cable. There is no polarity with this switch but the manufacturer does suggest installing this switch on the ground (negative) side of the battery as it is safer. This makes sense as any owner's manual or mechanic will tell you to hook up positive first and then negative when installing a battery. When removing one you remove the negative first and then positive, that's in effect what you're doing when you install this switch on the negative side. It took a while but I managed to find a black, 2 gauge battery cable that worked for me: https://amzn.to/2VGcEJg. This switch requires a 3/8" lug and if you are installing this on an RV or boat your battery probably requires a 3/8" lug as well. Keep this in mind as there are also cables with 5/16" lugs (used with motorcycles and other smaller vehicles), either on both or one end. 18" of length was the perfect size for me as it allowed enough slack to go around the box lid easily. The kit comes with four hex head bolts, nuts, and a bottom cover. What's not clearly shown is each of the four side panels is removable so you can pick the best one to remove for your application. Using some trial and error I figured out the proper drill bit size to drill my holes for mounting. I opted to install this switch on the top of my battery box. I started by placing the bare switch (bottom plate removed) on the lid and marking each hole to drill. With what I believe ended up being a 5/16" drill bit I drilled each hole. I then removed the panel opposite the "on" indicator as I wanted the "on" side in front and the cables out the back. I hooked up my extra cable and headed out to the RV. I then made sure the switch was set to "off" and hooked it up to my RVs ground (negative) cable. In the case of my RV this cable is white and you can clearly see it attached to the frame to ground it. With all that done and making sure my switch is still set to "off", I attached the other end of my extra cable to the battery's negative terminal. With the switch off you won't see any sparks when you do this. At this point, I replaced the bottom cover to have some extra weatherproofing as the bolts easily extend well beyond it. I tightened down the bolts to the lid using the standard hex "star" bit that came with my drill/driver set and holding the nut inside the lid with a ratchet. With that done you're ready to re-attach your lid to your battery box and give it a try. Some photos from the manufacturer show a way of installing the switch INSIDE your battery box. There's no template provided for this so you would have to figure out the size of the hole to make for the switch. This probably is more weatherproof and while I do have a Rotozip (you could also use a hole saw drill bit if you figure out the right size) I wasn't sure I had enough room with my battery and thought this was overkill. You could also attach this to the side of the top of the lid with the cables coming out the bottom. With this method though I figured water would be more likely to get in being kicked up from the road or off my truck's tires. So I decided on top with the cables coming out the back was the best option. You could probably use silicone to seal it if you wanted to, I may do that, but that's probably overkill as well. IN USE In use this switch is simple, turn the switch on and there's power to your RV, you also need it on to charge your battery if your RV is hooked up to power or your tow vehicle. I flip it on when I come back to my RV. Once you are going to put your RV in short or long-term storage, switch it off and your days of searching for power vampires or coming back to a dead battery are over. Hopefully, my new battery will last more than two seasons now.
Review: Reliable and Easy-to-Use Battery Switch - This switch has proven to be an excellent addition to my DIY projects for my custom power bank. This 12-48 V battery power cut master switch is incredibly reliable and ensures a secure disconnect when needed. The on/off functionality is straightforward and easy to operate, providing peace of mind when isolating the battery for maintenance or safety reasons. One of the standout features is its robust construction. The switch feels solid and durable, capable of withstanding harsh conditions whether installed in a vehicle, RV, or boat. The installation process was simple and intuitive, with clear instructions that made it easy to get everything set up quickly. The only minor downside is that it could benefit from slightly larger terminal posts for easier connection with heavier gauge wires. However, this is a small issue compared to the overall effectiveness and reliability of the switch. I believe this switch is a highly recommended product for any DIYer looking to safely manage their vehicle or RV's battery connections. Its ease of use, solid build, and dependable performance make it a must-have for ensuring battery safety and maintenance.

## Features

- Heavy Duty: ABS plastic housing, durable made for safety use, rear cover insulates terminals against any short of circuits, equiped with 4 sets of bolts, 4 pcs 2x3/8" copper lugs, a wrench and 4 pcs heat shrink tubing.
- Specification: On/Off 2 positions, 275 A continuous at DC 12V, 455 A intermittent at DC 12V, 1250 A momentary at DC 12V.
- Compatible: used for DC 12 - 48 V systems to isolate and secure the electrical system, can stand alone or be locked together with other switch.
- Purpose: eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely.
- Copper terminal stud size: 3/8" (10 mm) x 2, very easy to install, universal used for car, vehicle, Rv and boat, also electrical equipment's switch.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B3JMJK43 |
| Actuator Type | Rotary |
| Best Sellers Rank | #11,943 in Automotive ( See Top 100 in Automotive ) #32 in Automotive Replacement Battery Switches |
| Brand | Ampper |
| Circuit Type | 2-way |
| Color | On-Off |
| Connectivity Protocol | X-10 |
| Connector Type | Screws |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Control Method | Touch |
| Current Rating | 275 Amps |
| Date First Available | December 18, 2016 |
| International Protection Rating | IP54 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 11 ounces |
| Item dimensions L x W x H | 2.76 x 3.74 x 2.95 inches |
| Item model number | Am-CBS0101 |
| Manufacturer | Ampper |
| Mounting Type | Surface Mount |
| Number of Positions | 2 |
| Operating Voltage | 48 Volts |
| Operation Mode | ON-OFF |
| Product Dimensions | 2.76 x 3.74 x 2.95 inches |
| Terminal | Screw |
| Unit Count | 1 Count |
| Vehicle Service Type | Universal Fit (voltage at: DC 12 - 48V systems): Marine Boat, Ship, Yacht, RV, Truck |
| Wattage | 3300 watts |

## Product Details

- **Brand:** Ampper
- **Connector Type:** Screws
- **Contact Type:** Normally Open
- **Current Rating:** 275 Amps
- **Item dimensions L x W x H:** 2.76 x 3.74 x 2.95 inches
- **Material:** Acrylonitrile Butadiene Styrene
- **Operating Voltage:** 48 Volts
- **Operation Mode:** ON-OFF
- **Switch Type:** Push Button
- **Terminal:** Screw

## Images

![Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit) - Image 1](https://m.media-amazon.com/images/I/41tGVza4B4L.jpg)
![Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit) - Image 2](https://m.media-amazon.com/images/I/515UUnNu6lL.jpg)
![Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit) - Image 3](https://m.media-amazon.com/images/I/51O9VMcq51L.jpg)
![Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit) - Image 4](https://m.media-amazon.com/images/I/51mvPf6GoRL.jpg)
![Ampper Battery Disconnect Switch 12V - 48V, Marine Battery Switch Disconnect Power Cut Shut Off with Lugs for Car, RV and Boat (On/Off Kit) - Image 5](https://m.media-amazon.com/images/I/51tkSgpmB4L.jpg)

## Questions & Answers

**Q: Is there a bottom or back?**
A: Yes the switch is fully enclosed except for the side you enter with the wire

**Q: These are listed as being rated for 275A continuous, but the manual this switch comes with says its only 200A continuous. Which is the correct rating?**
A: Thank you for your purchase.
The item you recieved is On-Off battery switch, and the pamphlet you recieved is 1-2-Both-Off battery switch, so sorry for the issue casued to you, the pamphlet may be mixed by our worker.
Fot the item you purchased X001H8MQTX (On-Off battery switch), the continuous rating is : 275Amps DC.

Also below are some tips for you to install the switch:
The 2 terminals are same, no negative and positive. Just like a switch, connected to the switch on both sides so when you flip the switch it cuts the circuit. 
More, recommend to install this cut off switches on the negative, not the positive (lower current in negative, will be more safety). 
The switch can be install in the negative wire, another short battery cable or cut existing cable and attach terminals on each end. 

Hope the info can help you.

**Q: How far from battery can it be installed?**
A: Mine is 2 feet from the battery, I don't think it matters. Your cable size will have to increase the further away from the battery that you install it.

**Q: If the switch is on off (red) is the battery not drawing or the disconnect is not engaged and battery still drawing? Over thinking I'm sure.**
A: battery 1 to switch,battery 2 to load side if you are using battery 2 too power stuff. if switch is off then battery 2 will power your things and not draw from main battery 1. To charge battery 2 turn switch to on then turn off when its fully charged if that makes sense

## Customer Reviews

### ⭐⭐⭐⭐⭐ Eliminate pesky power vampires with this sturdy switch.
*by G***Y on April 30, 2019*

You can spend hours or lots of money trying to find every power vampire in your RV. I spent two seasons with my battery always being completely dead when I came back to my RV despite all my attempts to get them all shut off. Then after the second season, my battery would no longer take a charge. My RV dealer suggested a cutoff switch and after some investigation, I went with this one. There are other cheaper and simpler options out there but I wanted something convenient, safe, and durable. This switch really fits the bill nicely. It's very well made and uses high-grade plastics. The switch has a very solid feel, it's easy to know if you are switch on or off. First, there aren't any instructions with this switch, they're mostly here on this page. What you will need to install it is an extra battery cable. There is no polarity with this switch but the manufacturer does suggest installing this switch on the ground (negative) side of the battery as it is safer. This makes sense as any owner's manual or mechanic will tell you to hook up positive first and then negative when installing a battery. When removing one you remove the negative first and then positive, that's in effect what you're doing when you install this switch on the negative side. It took a while but I managed to find a black, 2 gauge battery cable that worked for me: https://amzn.to/2VGcEJg. This switch requires a 3/8" lug and if you are installing this on an RV or boat your battery probably requires a 3/8" lug as well. Keep this in mind as there are also cables with 5/16" lugs (used with motorcycles and other smaller vehicles), either on both or one end. 18" of length was the perfect size for me as it allowed enough slack to go around the box lid easily. The kit comes with four hex head bolts, nuts, and a bottom cover. What's not clearly shown is each of the four side panels is removable so you can pick the best one to remove for your application. Using some trial and error I figured out the proper drill bit size to drill my holes for mounting. I opted to install this switch on the top of my battery box. I started by placing the bare switch (bottom plate removed) on the lid and marking each hole to drill. With what I believe ended up being a 5/16" drill bit I drilled each hole. I then removed the panel opposite the "on" indicator as I wanted the "on" side in front and the cables out the back. I hooked up my extra cable and headed out to the RV. I then made sure the switch was set to "off" and hooked it up to my RVs ground (negative) cable. In the case of my RV this cable is white and you can clearly see it attached to the frame to ground it. With all that done and making sure my switch is still set to "off", I attached the other end of my extra cable to the battery's negative terminal. With the switch off you won't see any sparks when you do this. At this point, I replaced the bottom cover to have some extra weatherproofing as the bolts easily extend well beyond it. I tightened down the bolts to the lid using the standard hex "star" bit that came with my drill/driver set and holding the nut inside the lid with a ratchet. With that done you're ready to re-attach your lid to your battery box and give it a try. Some photos from the manufacturer show a way of installing the switch INSIDE your battery box. There's no template provided for this so you would have to figure out the size of the hole to make for the switch. This probably is more weatherproof and while I do have a Rotozip (you could also use a hole saw drill bit if you figure out the right size) I wasn't sure I had enough room with my battery and thought this was overkill. You could also attach this to the side of the top of the lid with the cables coming out the bottom. With this method though I figured water would be more likely to get in being kicked up from the road or off my truck's tires. So I decided on top with the cables coming out the back was the best option. You could probably use silicone to seal it if you wanted to, I may do that, but that's probably overkill as well. IN USE In use this switch is simple, turn the switch on and there's power to your RV, you also need it on to charge your battery if your RV is hooked up to power or your tow vehicle. I flip it on when I come back to my RV. Once you are going to put your RV in short or long-term storage, switch it off and your days of searching for power vampires or coming back to a dead battery are over. Hopefully, my new battery will last more than two seasons now.

### ⭐⭐⭐⭐⭐ Reliable and Easy-to-Use Battery Switch
*by D***D on July 14, 2024*

This switch has proven to be an excellent addition to my DIY projects for my custom power bank. This 12-48 V battery power cut master switch is incredibly reliable and ensures a secure disconnect when needed. The on/off functionality is straightforward and easy to operate, providing peace of mind when isolating the battery for maintenance or safety reasons. One of the standout features is its robust construction. The switch feels solid and durable, capable of withstanding harsh conditions whether installed in a vehicle, RV, or boat. The installation process was simple and intuitive, with clear instructions that made it easy to get everything set up quickly. The only minor downside is that it could benefit from slightly larger terminal posts for easier connection with heavier gauge wires. However, this is a small issue compared to the overall effectiveness and reliability of the switch. I believe this switch is a highly recommended product for any DIYer looking to safely manage their vehicle or RV's battery connections. Its ease of use, solid build, and dependable performance make it a must-have for ensuring battery safety and maintenance.

### ⭐⭐⭐⭐⭐ Shuts the power down
*by C***Y on February 22, 2025*

I’m beyond pleased with how well it works. The switch itself is well-designed with a clear "ON" and "OFF" indication, and it rotates smoothly with little effort. The switch has a compact size, so it doesn’t take up too much space, which is perfect for installations in tight areas. It’s designed to handle a wide voltage range of 12V to 48V, which makes it versatile for use in many different applications. The wiring process was straightforward, and the switch fit perfectly where I needed it in my vehicle. For anyone familiar with basic electrical work, this is an easy DIY installation. If not, get someone who knows what they are doing. A simple turn of the knob is all it takes for preventing battery drain when my RV is not in use. When the switch is in the "OFF" position, it completely disconnects the battery, which helps preserve battery life and prevent potential electrical issues. This battery switch is an excellent investment. Considering its affordability, ease of installation, and reliability, it offers great value. By helping me preserve my battery life and offering the convenience of easily disconnecting the power, it has saved me from purchasing new batteries.

## Frequently Bought Together

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-15*