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Ampper High Current Battery Switch, 12-48 V Battery Master Cut Disconnect Switch Isolator for Marine Boat, Ship, Yacht, RV, Truck (On/Off, High Current)

4.6 4.6 out of 5 stars 8,977 ratings

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On-Off
High Current

Purchase options and add-ons

Material
Plastic, Acrylonitrile Butadiene Styrene, Copper
Mounting Type
Surface Mount

About this item

  • VERY Heavy Duty: design for high current situations, ABS plastic housing, durable made for safety use, rear cover insulates terminals against any short of circuits, equiped with 4 sets of bolts.
  • Operation: On/Off 2 positions, 600 A continuous at DC 12V, 2500 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: 1/2" (12 mm) x 2, very easy to install, universal used for marine boat, ship, yacht, Rv, truck, also electrical equipment's switch.
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$15.98
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Ampper High Current Battery Switch, 12-48 V Battery Master Cut Disconnect Switch Isolator for Marine Boat, Ship, Yacht, RV, Truck (On/Off, High Current)
Ampper High Current Battery Switch, 12-48 V Battery Master Cut Disconnect Switch Isolator for Marine Boat, Ship, Yacht, RV, Truck (On/Off, High Current)
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Price$36.99$31.19$12.88$16.28-19% $12.14
List:$14.99
$11.99
Delivery
Get it as soon as Tuesday, Mar 19
Get it as soon as Tuesday, Mar 19
Get it as soon as Tuesday, Mar 19
Get it as soon as Tuesday, Mar 19
Get it as soon as Tuesday, Mar 19
Customer Ratings
Easy to install
4.5
3.3
4.5
4.5
4.6
4.5
Value for money
4.6
3.6
3.8
4.6
4.1
Easy to use
4.5
4.6
4.7
4.4
Weatherproof
4.0
4.0
3.9
4.2
Sold By
Ampper Direct
TAHIMA
Huazu Directly
panda mimi
Amazon.com
Ampper Direct
material
Copper, Acrylonitrile Butadiene Styrene, Plastic
Acrylonitrile Butadiene Styrene, Plastic, Nylon, Brass
Plastic, Brass
Acrylonitrile Butadiene Styrene
Copper, Acrylonitrile Butadiene Styrene, Plastic
Acrylonitrile Butadiene Styrene
switch type
Kill Switch, Temperature Switch
Ignition Switch
Rotary
Rotary
Kill Switch
connector type
Screw
Screw
Screw
Plug In
number of positions
2
2
2
2
actuator type
Rotary
Rotary
Rotary
Rotary
terminal type
Marine
Screw
marine
Marine
Marine
Marine
operation mode
ON-OFF
ON-OFF
Off
ON-OFF
ON-OFF
Off

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Product Description

Ampper 12 - 48 V high current battery disconnect switch for marine boat, ship, yacht, Rv, truck.

Specifications:
1, Design for high current situations.
2, ABS plastic housing, durable made for safety use.
3, Rear cover insulates terminals against any short of circuits.
4, On/Off 2 positions.
5, Copper terminal studs with nuts and washers.
6, 4 mounting screw holes.
7, 600 A continuous at DC 12V, 2500 A momentary at DC 12V.
8, Used for DC 12 - 48V systems to isolate and secure the electrical system.
9, Can stand alone or be locked together with other switch.
10, Eliminate any power draw from the battery when vehicle or boat is not in use.
11, Disconnects the battery safely.
12, Universal used for Car, Vehicle, RV and Boat.
13, Used as electrical equipment's switch.
14, Size: 4.3" x 4.3" x 3.9".

Complete kits includes:
1 x battery switch.
4 sets of mounting bolts.

100% Satisfaction.
No reason for return or change.

Order it now!

Product information

Technical Details

Additional Information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Ampper High Current Battery Switch, 12-48 V Battery Master Cut Disconnect Switch Isolator for Marine Boat, Ship, Yacht, RV, Truck (On/Off, High Current)


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Customer reviews

4.6 out of 5 stars
4.6 out of 5
8,977 global ratings

Customers say

Customers like the appearance and battery connectivity of the electronic switch. They mention it's a great looking product that doesn't stick out very far. They appreciate the ease of installation, and quality of the product. That said, opinions are mixed on mounting, fit, and hole size.

AI-generated from the text of customer reviews

481 customers mention400 positive81 negative

Customers like the quality of the electronic switch. They mention that it's heavy duty, works well, and is a good solid product. Some say that it works well for a quick kill switch and is perfect for an interior install. Overall, most are happy with their purchase and recommend it to others.

"Easy to setup and connectWorks great" Read more

"Good quality. Easy to install and wire. Very versatile." Read more

"...IN USEIn 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..." Read more

"Works as designed and easy install" Read more

243 customers mention210 positive33 negative

Customers like the ease of installation of the electronic switch. They mention that it is simple and functional, and that the wiring is great. Some appreciate the excellent quality including mounting hardware.

"Easy to setup and connectWorks great" Read more

"Good quality. Easy to install and wire. Very versatile." Read more

"Works as designed and easy install" Read more

"Easy install and heavy duty product. Positive switching." Read more

75 customers mention56 positive19 negative

Customers like the battery connectivity of the electronic switch. They mention that it really cuts down on battery drain while the RV is in storage, makes it easier to kill the power, and prevents the slow battery drain. It installs easily and solved their battery problem.

"...not sure why it just asked me if it was other than that it functions as a disconnect fine and handles zero gauge wire fine to i use it in my trucks..." Read more

"I can disconnect my battery so I'm not draining it when I don't want to use power. I don't have to dig out a tool to remove the cables each time." Read more

"This is the easy way to shut down a 12V battery source without having to unscrew the terminals...." Read more

"...on a ZTR mower that flooded and was repaired but had a constant low voltage battery drain...." Read more

65 customers mention61 positive4 negative

Customers appreciate the value of the electronic switch. They mention that it is a simple solution for cheap, works great, and is easy to install. Some say that the product arrived quickly and in good condition.

"Good cheap and has full metal other than the handle great for boats" Read more

"...Good value." Read more

"Very inexpensive and does the job great" Read more

"...Works as it should and dont see why it wont last. Simple solution for cheap!!" Read more

41 customers mention34 positive7 negative

Customers like the appearance of the electronic switch. They mention it's a great looking product, it works as described, and it doesn't stick out very far. Some say that it has a positive feel and a reasonable graphic representation for on and off.

"...But more importantly this switch feels and looks so much better than the previous one with a T-shaped key...." Read more

"Like the design and how compact it is and easy functionality" Read more

"...I used oval head bolts and the contoured washers. It looks good and doesn't stick out very far." Read more

"...Prevents the slow battery drain. Looks good and works perfectly" Read more

56 customers mention37 positive19 negative

Customers are mixed about the fit of the electronic switch. Some mention that the small size and quality is big, while others say that the switch is a little bit bigger than what they planned on for the spot that was going to. Easy instructions. They say that they wish the bolts were a bit shorter and that the locking style nuts are a tad small. They also mention that some of the Allen bolts are stripped.

"Like the design and how compact it is and easy functionality" Read more

"...It fits perfect - very tight. You might think the hole is too small, but work it. The one downside is the bolts...." Read more

"...The only thing I don’t like is the bolts are too long, I wish they were flushed mountable." Read more

"...These accommodate large-sized ring terminals and mount securely. I've used these numerous times and have not had a failure or bad experience yet." Read more

27 customers mention12 positive15 negative

Customers are mixed about the hole size of the electronic switch. Some mention that it comes with four nice bolts for mounting on a metal panel, while others say that the screws were missing out of one of the boxes. The body has too small of recessed screw holes to allow for other kinds of fasteners, and the screws protrude from the back.

"...It fits perfect - very tight. You might think the hole is too small, but work it. The one downside is the bolts...." Read more

"...The kit comes with four hex head bolts, nuts, and a bottom cover...." Read more

"The switch is cheap and not engineered well. The provided mounting screws are too long and cant be use with the back plate provided with the switch...." Read more

"This switch was easy to install, and came with its own set of hardware to do so. It is very easy to operate, and see...." Read more

18 customers mention10 positive8 negative

Customers have mixed opinions about the mounting of the electronic switch. Some mention that it mounts well, while others say that the mounting hardware is confusing and makes a flush mount impossible.

"It mounts well but the screws could be a 1/4" longer... Seems heavy enough for power cut outs,, iv placed it in a 12v dc camper system and as of now..." Read more

"...The only thing I don’t like is the bolts are too long, I wish they were flushed mountable." Read more

"...These accommodate large-sized ring terminals and mount securely. I've used these numerous times and have not had a failure or bad experience yet." Read more

"...The screws and nuts that attach bottom cover are awkward. Makes a flush mount impossible. No matter what way you try it it’s awkward on the base...." Read more

Eliminate pesky power vampires with this sturdy switch.
5 Stars
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 USEIn 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.
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Top reviews from the United States

Reviewed in the United States on February 27, 2024
Color: On-OffSize: Battery Switch KitVerified Purchase
Reviewed in the United States on February 21, 2024
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One person found this helpful
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Reviewed in the United States on April 30, 2019
Color: On-OffSize: Battery SwitchVerified Purchase
Customer image
5.0 out of 5 stars Eliminate pesky power vampires with this sturdy switch.
Reviewed in the United States 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.
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213 people found this helpful
Report
Reviewed in the United States on February 26, 2024
Color: 1-2-Both-OffSize: Battery SwitchVerified Purchase
Reviewed in the United States on February 22, 2024
Color: On-OffSize: Battery Switch KitVerified Purchase
Customer image
5.0 out of 5 stars Great switch
Reviewed in the United States on February 22, 2024
Works as designed and easy install
Images in this review
Customer image
Customer image
Reviewed in the United States on February 25, 2024
Color: On-OffSize: Battery Switch KitVerified Purchase
Reviewed in the United States on February 1, 2024
Color: On-OffSize: Battery Switch KitVerified Purchase
Reviewed in the United States on February 10, 2024
Color: On-OffSize: Battery SwitchVerified Purchase
One person found this helpful
Report

Top reviews from other countries

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Amazon Customer
5.0 out of 5 stars Easy to install
Reviewed in Canada on December 18, 2023
Color: On-OffSize: Battery SwitchVerified Purchase
Roger Hawkes
5.0 out of 5 stars Purfect
Reviewed in the United Kingdom on January 30, 2023
Color: On-OffSize: Battery SwitchVerified Purchase
One person found this helpful
Report
Ian Robinson
5.0 out of 5 stars Battery switch
Reviewed in Australia on January 12, 2024
Color: On-OffSize: Battery SwitchVerified Purchase
はっちゃん
5.0 out of 5 stars 丁度良い大きさ。
Reviewed in Japan on November 20, 2023
Color: On-OffSize: Battery SwitchVerified Purchase
HIRO
5.0 out of 5 stars インバータ入力のバッテリの切り替えに使っています。
Reviewed in Japan on August 5, 2023
Color: 1-2-Both-OffSize: Battery Switch KitVerified Purchase