Best Battery Disconnect Switch For RV, Car, Boat, Side Post, ATV

Even when you electrically turn your RV engine off by turning the ignition key, some of the battery power can still be drained. This isn’t much of a problem if you use your RV regularly. But if you plan to park it for a long while, chances are the battery will get completely discharged, and your RV won’t start the next time.

To prevent this situation, you need a battery disconnector switch to manually cut off the power line. We will go over some of the most popular switches and help you find the best battery disconnect switch. You will also get an informative buying guide mentioning the factors you need to consider. Let’s get started.

List of Best Battery Disconnect Switch:

Best RV Battery Disconnect Switch Reviews

See us review the most popular battery disconnect switch for RV in terms of their quality, durability, and other features. This might help you narrow down your choice list.

1. Ampper 12-48V Battery Power Cut Master Switch

Ampper 12-48V Battery Power Cut Master Switch

Highlighted Features:

  • Material: Acrylonitrile Butadiene Styrene
  • Switch Type: Rotary Switch
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Surface Mount
  • Operating Voltage: 48V

Be it your RV, car, or luxury yacht, cutting the battery power when the vehicle engine turns off is crucial to saving battery life. This battery cutoff switch for RV will do the job quite efficiently. 

The switch housing is made of durable ABS plastic, so it will withstand heavy usage for a long time. It has two positions to turn the switch on or off simply. This battery cut off switch works for a wide range of systems from 12V to 48V. 

So, it will fit many different use cases. Installing the switch is very easy. It comes with four sets of mounting bolts that you can fit inside the screw hole on the housing. Installing the switch will take only a few moments.

The terminal studs are made of copper for great conductivity. They are three-eighth of an inch with a well-designed circuit to back all the electrical power smoothly. This universal switch can also be used for other electrical equipment.

And the terminals are insulated by a rear cover to prevent short circuits or fire issues. This surface-mounted switch has a current rating of 455 Amps. The rotary actuator lifts the switch in on or off positions.

You can use this switch with other switches to create a multi-layer safety mechanism in your electrical equipment. The sides of the switch are covered with plastic to keep the inside free from dust. You can choose this switch for its simplicity and safe performance.

2. Kohree 12V-48V Batter Disconnect Switch

Kohree 12V-48V Batter Disconnect Switch

Highlighted Features:

  • Material: Alloy Steel, Acrylonitrile Butadiene Styrene
  • Switch Type: Rotary Switch
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Plug-in Mount
  • Operating Voltage: 48V

This battery shut off switch for RV is very similar to the previous one, except it comes from one of the most prestigious brands. The design is almost identical with a strong and durable plastic housing.

But the lift type is a bit different from the previous one. You will have an on-off-on type circuit that is controlled by the rotary switch. It has a screw-type terminal at the bottom, which is made of copper and has a diameter of 10mm.

Four long mounting bolts and nuts are provided with the switch to mount it easily. This CE-certified switch is compatible with various motor vehicles such as RVs, boats, cars, ATVs, trucks, etc. The operating voltage range varies from 12-48V, while the continuous operating current is 275A. But the intermittent current can go up to 455A. 

Clear labeling on the switch makes it easier to operate. The distinctive sound of the gears will allow you to operate the switch even at night. It has the same rotary actuator as the previous switch, but the mounting style is a bit different here.

The rear cover of the terminal protects the two-way circuit from being short. As a result, the chances of electrical hazards are reduced to a great extent. It also has side skirts to keep the switch from dust. 

As it costs less than the previous one, give this a try.

3. Nilight – 90015A 12-48V Heavy Duty Battery Power Cut Master Switch

Nilight – 90015A 12-48V Heavy Duty Battery Power Cut Master Switch

Highlighted Features:

  • Material: Acrylonitrile Butadiene Styrene
  • Switch Type: Rotary
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Panel Mount
  • Operating Voltage: 48V

With no assembly required, this RV battery cut off switch will get installed in minutes. Once mounted in the battery panel, it will rotate between On and Off positions to cut the battery power from the circuit. As a result, battery discharge will be no more an issue.

Its housing is made of sturdy ABS plastic to withstand rough use. The switch will take a lot of pounding and still work fine. Beneath the switch cover, there is a copper terminal stud that measures 10mm in diameter. 

The switch is suitable for a wide array of systems, including RV, boat, car, truck, etc. It has a maximum operating voltage of 48V and an operating current rating of 455A. 

It is a rotary type switch with the same rotary type actuator. There are two lift positions in the switch. The circuit is well-designed to cope with all the systems mentioned above.

Turning the switch On or Off is easy even in the dark due to the clicky gear sound. There is a painted indicator on the switch to easily know its position. On and Off positions are also painted in green and red, respectively.

It comes with four mounting bolts, and installing takes almost no time. The dust cover on the sides of the switch is removable so that you can easily clean the base of the switch. 

This is a great value for money with two years of mechanical life.

4. Ampper Side Post Knife Blade Master Switch

Ampper Side Post Knife Blade Master Switch

Highlighted Features:

  • Material: Brass
  • Switch Type: Knife Blade
  • Lift Type: On-Off-On
  • Connector Type: Screw
  • Mounting Type: Side Mount
  • Operating Voltage: 24V

The design of this RV battery shut off switch is completely different from the switches we have discussed till now. This is a knife blade type switch that you can drop or lift to turn the battery power on or off. 

It is usually mounted on the side post of the battery. As the switch has a polarity, you need to connect it to the negative terminal of the battery. Lifting the knife blade actuator will cut off the battery and eliminate the chance of unnecessary power draw.

With its solid brass construction, the switch is highly durable and can withstand heavy-duty usage. The blade and terminal studs are rust-resistant, so the switch can operate in any weather conditions. It is suitable for versatile systems, such as RV, cars, or other vehicles. You can also use this battery disconnector in campsites.

You will also get a top-mounted version of this switch, in case if your system is different. It will come with a short and a long mounting bolt for easy installation. Once properly fitted, the actuator arm is very convenient to lift and drop.

Besides using it as a stand-alone safety, you can also combine the switch with other switches to reduce the chance of mishaps. There is almost no possibility for short circuits, so the switch will be very safe to use.

And this switch comes at a great price!

5. LotFancy Battery Disconnect Master Cutoff Switch

LotFancy Battery Disconnect Master Cutoff Switch

Highlighted Features:

  • Material: Acrylonitrile Butadiene Styrene
  • Switch Type: Rotary
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Surface Mount
  • Operating Voltage: 48V

Another heavy duty battery disconnect switch with rotary design from LotFancy store. The switch will take care of the electrical systems of your RV, car, or other vehicles by cutting the battery line when the vehicle is not in use.

The design of this rotary switch is similar to those we have discussed earlier. It has a copper terminal stud that lies below the switch cover. The terminal stud has a diameter of about 10mm. It works in two positions to safely kill the battery connection and increases battery life by reducing power draw.

You can mount this switch on the surface of the battery system. It comes with four mounting bolts to install the screw, and the installation is quite easy. Anyone with basic knowledge of battery systems can install the switch. It has a mechanical life of one year.

The actuator smoothly turns the switch on or off with a clicky sound so that you can determine whether the operation is successful or not. It works in an operating voltage range of 12-48V, so any of your vehicle systems will be benefited from the battery.

Its housing is made of durable ABS plastic, so you can expect the switch to work without any issues for a long time. The rear cover provides protection against short circuits, so the chances of electrical hazards will be close to zero. Such an effective switch to kill battery!

6. Zoostliss Battery Kill Switch

Zoostliss Battery Kill Switch

Highlighted Features:

  • Material: Brass
  • Switch Type: Rotary
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Plug-in Mount
  • Operating Voltage: 12V

Though this is also an RV battery kill switch with a rotary design, it works a bit differently. Instead of having a knob to turn the switch on or off, you get a key to insert into the keyhole and then turn the key to cut the battery power.

The terminals and other components of the switch are made of solid brass. As a result, the switch is resistant to rust and corrosion. It will work fine in humid or cold weather conditions alike, nothing to worry about the terminal getting decayed.

Two keys are provided with the switch. The keyhole is protected by a plastic cover so that no dust or debris can enter the hole. You need to insert the key in the right direction to twist the switch. 

Though the operating voltage of this switch is lower than most other models we have seen before, this will be suitable for any of your RV, car, truck, etc. Installing the switch is very easy; you just need to screw the mounting bolts in place. The switch should snugly fit the mount so that it doesn’t move while turning the key.

Its build quality is solid considering the price point. Getting a battery disconnector switch at just under eight bucks is a great deal, especially when the switch is so easy to install and operate. 

It has an operating current rating of 500A. Though it doesn’t come with any warranty, it should last a few good years.

7. Fastronix Solutions 2 Post High Current Master Battery Disconnect Switch

Fastronix Solutions 2 Post High Current Master Battery Disconnect Switch

Highlighted Features:

  • Material: Aluminum
  • Switch Type: Rotary
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Face Plate
  • Operating Current: 180A

The design of this master disconnect switch consists of a push-button type actuator with a rotary switch. And the housing is also different than other switches we have reviewed so far. It has a durable metal housing to protect everything inside the switch from external hits.

It has a faceplate to keep the bottom part of the switch hidden from the top. As a result, the switch will fit any battery system while looking sleek. You can crank the rotary switch to turn the battery connector on or off.

This switch has a big difference in terms of switch position with other switches. It will usually stay in the off position as the handle is spring-loaded. You will hear the distinctive click when you turn the switch on to know the switch actually worked.

Two positions on the switch are marked beautifully so that you don’t have any problem turning the switch on or off. The paint kind of glows, so you can perform the operation even in low light conditions.

You can have two different panel thicknesses in this switch. One of them will be a quarter of an inch, and the other will be five-eighth of an inch. Though the switch works within the same voltage range as most other switches, its current rating is only 180A. 

With durable construction and excellent circuit quality, this switch will meet all your needs but cost a bit more.

8. Willstart Three Gear Vehicles Battery Switch

Willstart Three Gear Vehicles Battery Switch

Highlighted Features:

  • Material: ABS
  • Switch Type: Rotary
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Surface Mount
  • Operating Voltage: 50V

Now, this is a bit unconventional as we mostly used such a switch to cut the battery power. Instead, it is an RV dual battery disconnect switch that you can use for more than two batteries. The switch has four selector positions to choose from.

Position one and two will turn the respective batteries on. Both will turn on all the batteries connected to the circuit. And the off position is for turning them both off. This switch comes in handy while dealing with dual engine systems in your RV or boats.

As you can already see from the design, it has a rotary switch with a rotary-type actuator. The switch housing is made of durable ABS plastic with four screw holes in the corners. Four mounting bolts will be provided with the switch to mount the switch on the battery surface.

And there are four removable side plates to cover the center of the switch. It protects the switch from catching dust or being wet. 8mm copper studs are used as terminals in this switch.

Its working voltage is slightly higher than the switches you have already seen. With an operating voltage of 50V, it delivers a continuous current of 200A. The durable build of this switch will make it last for several years without any fault.

Though it costs a bit more than its competitors, we think the price is justified by its durability and versatility.

9. Intellitec 100A Battery Disconnect Switch

Intellitec 100A Battery Disconnect Switch

Highlighted Features:

  • Material: ABS
  • Switch Type: Latch
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Actuator Type: Automatic
  • Operating Voltage: 12V

This RV auxiliary battery switch is completely different from what you have seen so far. Instead of having rotary-type actuators, this has a latch-type switch inside the housing. The switch is controlled by the battery voltage applied to the terminals. Seems interesting, right? 

Do you know that the latching system in this switch was solely made for cutting battery power when your RV or any other vehicle is not in use? The disconnector relay cuts off battery power to reduce unnecessary discharge.

Once properly installed, you need to apply +12V to the I terminal of the switch. The ground will be connected to the S terminal. In that case, the magnetic field attracts a plunger to bridge the connection. 

You will be amazed by how simple and efficient this battery isolator switch is. It also has two fuses, each of 5A, on the relays to protect the system from any mishaps. Its operating voltage is 12V while it delivers a constant current of 100A.

The build quality of this switch is spot on. A combination of ABS plastic housing and metal components is used to build the switch. It is shock-resistant, so using the switch in your vehicle on rough terrains will never be an issue.

This switch is guaranteed to have a minimum working life of 10,000 cycles. The price can be an issue, but you need to pay more to get an advanced switch.

10. Battery Cutoff Switch for Chassis Battery

Battery Cutoff Switch for Chassis Battery

Highlighted Features:

  • Material: ABS
  • Switch Type: Rotary
  • Connector Type: Screw
  • Terminal: Copper Stud
  • Mounting Type: Surface Mount
  • Operating Voltage: 24V

We want to end our reviews with this battery isolator switch for RV. It is very compact and looks the same as rotary switches we have already seen. The same ABS plastic housing protects the inner components of the switch.

It is suitable for many different chassis batteries, such as RV, car, truck, etc. The surface-mounted switch will fit easily with four mounting bolts. It has a rotary type actuator to toggle the knob between on and off positions.

Installing the switch is very easy, but you should consider the polarity while installing. The switch will notify successful operations with a clicky feel. On and Off positions are marked on the switch so that you can easily identify them.

It has a copper stud terminal of 10mm. Connections made through the terminals will always be safe from electrical hazards such as short circuits. But we didn’t get any information about the certification or warranty of the switch.

The build quality indicates that the switch will run for a long time. Side skirts were missing in this switch, so the inside could quickly catch a lot of dust. It operates at 12V and delivers a continuous current of 100A. 

Another thing that pricks us about this switch is the price. Similar switches are available at a lot lower price. So, the decision is yours.

Should I Use A Battery Disconnect Switch?

Cutting the battery power prevents the battery from being discharged when the engine is turned off. As a result, you will have no problem starting your RV after a long break. 

Another big reason you should use a battery isolator switch is to prevent theft. Though most of the thieves know about battery kill switches, it is an extra hassle for them if they don’t know why the vehicle isn’t starting.

Battery Disconnect Switch

So, you should definitely use the best RV battery disconnect switch to ensure the overall safety of your RV or other vehicles.

How Do I Choose A Battery Disconnect Switch?

Selecting the right switch requires you to keep an eye on endless factors. We have compiled some of the most important factors to help you choose the best battery disconnect switch. Let’s check them out.

Switch Type

Battery kill switches come in a few different types. Rotary-type switches are the most common out there. They are extremely popular for their durability and easy installation.

You can turn the switch on or off by twisting the knob. These switches are commonly surface-mounted, but some can be plugged too. Another common type is the knife blade type switch. These switches are operated by the lever between the terminals. Lifting or dropping the lever turns the switch off or on.

Battery Disconnect Switch

You can also use automatic switches that use remote controls. They usually work with electromagnetic signals to turn on or off. If your vehicle has two or more battery systems, using a relay switch is also a convenient option.

So, you should choose the right switch type depending on your needs.

Voltage and Current Rating

Checking the voltage and current rating before buying a switch is essential. You should buy a switch that is compatible with your battery system. Most battery disconnect switches work within the 12-48V range, but some will be limited to a 24V battery. 

The continuous current rating varies between 100A and 400A. But the intermittent current can go a lot higher than this range in the case of a surge. The switch needs to be capable of handling such power.

Material and Build Quality

Most switches are made with a sturdy ABS plastic housing and copper terminals. Metal switches are also commonly available. No matter the housing material, the switch should withstand heavy usage. It should also be shock-resistant so that the switch remains functional even if your RV travels through rough terrains.

Battery Disconnect Switch

The terminals should be rust and corrosion-resistant to work fine even in humid or wet weather conditions. A standard battery cut off switch should last for at least a few years without any issues.

Installation

The installation procedure will vary based on what switch you buy. But it should be easy for a non-technical person. If you are an RV owner with a basic knowledge of battery or electrical systems, you can easily install these switches by following a few simple steps mentioned below.

Most switches will come with mounting bolts and nuts. They should snugly fit onto the battery system so that the switch doesn’t get displaced while using.

Operation and Purpose

Some RV owners look for a switch to cut the battery power when the vehicle is turned off. Other vehicle owners might want a switch as a part of theft protection. So, the choice will vary depending on the purpose.

If you want a switch to prevent the battery from discharging, the switch should be well compatible with the battery system. 

Switch Positions

Battery cut off switches commonly have two positions, on and off. But you can get more options in the switches that are used in systems with more than two batteries. You can select the number of batteries required to turn on or off with these switches.

Battery Disconnect Switch

Safety and Protection

To ensure the switch works properly, its terminals should be covered to prevent dust and water from going inside. Some switches have safety fuses to fight short circuits or other hazards.

Pick one that is easy to use and protects the whole system from any mishaps.

Certification and Warranty

Non-brand switches often don’t come with any safety certification. But you should buy a certified switch even if it’s pricier to maintain safe operation for longer. Having a warranty will keep you relaxed throughout, but it isn’t a must if you find a good switch with a good build quality and rating.

How to Install a Battery Disconnect Switch In an RV?

Installing a battery cut off switch in an RV can vary depending on the type of switch you purchase. But here will be a common guideline for everyone to install such switches easily.

  • Always check the polarity of the switch first. Some switches need to be connected to the positive battery terminal while others to the negative. Determine which side goes where.
  • Determine the mount type of the switch. You might need to remove a portion of the battery cover to install the switch.
  • Connect the switch’s terminals to the battery’s appropriate terminals. You can use an ohmmeter to test the switch before installing it to guarantee that it will work properly afterward.
  • After installing the switch, make sure you put the side covers in place to protect the switch from dust.

FAQs

We usually answer a few commonly asked questions in this section. Let’s take a look at them.

1. When should you use the RV battery cutoff switch?

You should use the RV battery cutoff switch if you want to park your RV for quite a while. It will prevent unnecessary discharge.

2. Why are RV battery disconnect switches not working?

There can be many reasons such as faulty switches, incorrect installations, unmatched ampere rating, and so on. 

3. Should a battery disconnect be positive or negative?

It depends on the polarity of the disconnect switch. Some should be connected to the positive while others to the negative.

4. Do I need to disconnect my RV battery to charge it?

It isn’t mandatory to disconnect RV battery to charge it. But you can do so once you park the RV to prevent discharge.

5. Do you need to disconnect both battery terminals?

No, disconnecting one terminal or both works the same. You can just disconnect one terminal before leaving your RV in the parking mode.

6. Should I disconnect my RV battery when plugged into shore power?

No. Instead, you should keep the battery connected so that it can get charged from the shore power. 

Final Words

Getting stuck in the middle of nowhere with a dead battery in your luxury RV is a real nightmare. Most RV owners even don’t know that the battery gets drained while they park the RV for a long time. Installing a battery disconnector switch is utterly important to prevent your vehicle batteries from getting discharged.With so many options on the market, it is daunting to choose such a switch. We have reviewed the top switches to help you find the best battery disconnect switch for your RV. And the buying guide will help you know the essential factors when making a purchase.