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Spartan Power

Spartan Power Battery ON/Off Disconnect Switch 300A - Ignition Protected, Heavy Duty Cutoff Switch for RV, Marine, and Automotive Battery - 12V to 48V - Red

  • Based on 348 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Oct 19 – Oct 20
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Size: 300A ON/OFF 2 Position


Color: Red


Features

  • Save Your Battery: The Spartan Power On/Off Battery Switch prevents any current from being drawn from the battery when your RV, van, boat, or car is not in use; Disconnect your battery safely and extend its life!
  • Ignition Protected: Our switch has a crank rating that withstands 900A for 30 seconds, 500A for 5 minutes, and 300A continuously, protecting against fluctuations in current during ignition
  • Simple, 2 Position Design: Our simple design is easy to read and to operate, simply turn the knob to either the On or Off position, and a satisfying click will let you know it's changed
  • Giving Power to The People: Helping people arm themselves with the right tools and accessories, Spartan Power manufactures ultra-high quality, durable, and heavy duty products; Trusted by professionals, enthusiasts, and DIYers everywhere

Description

We’re all about giving power to the people. That means providing high-quality, effective resources that you can use to power your life and the spaces that you live in and drive in every day. You know how to use these products. You know how to install them yourself. These are tools made for the American DIYer, so that together we can go farther, faster.

Operation Mode: ON-OFF


Current Rating: 300 A


Contact Type: Normally Open


Connector Type: screws


Brand: Spartan Power


Switch Type: Rotary


Terminal: Marine


Material: Copper


Item dimensions L x W x H: 3.25 x 3.25 x 3.6 inches


Circuit Type: Single Circuit ON-OFF


Operation Mode: ON-OFF


Current Rating: 300 A


Contact Type: Normally Open


Connector Type: screws


Switch Type: Rotary


Terminal: Marine


Circuit Type: Single Circuit ON-OFF


Mounting Type: Panel Mount


Actuator Type: Rotary


Number of Positions: 2


Control Method: Touch


Connectivity Protocol: X-10


Wattage: 14400 watts


Compatible with Vehicle Type: RV, Marine, Automotive


Control Type: Knob


Compatible Devices: RV, marine, and automotive devices requiring 12V to 48V DC power supply


Color: Red


Item Dimensions: 3.25 x 3.25 x 3.6 inches


Unit Count: 1 Count


Number of Items: 1


Material Type: Copper


Contact Material: Copper


International Protection Rating: IP54


Brand Name: Spartan Power


Model: SP-BS300A-RED


Manufacturer: Spartan Power


UPC: 810019984327


Part Number: SP-BS300A-RED


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 19 – Oct 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Good product.
Size: 300A ON/OFF 2 Position Color: Red
I bought this one and a cheaper one. Buy the cheaper on. Except for being a darket color and having a name on it they both are identical
Reviewed in the United States on July 1, 2026 by racersdad04
    • Works as advertised!
Size: 300A ON/OFF 2 Position Color: Red
Does what it is supposed to do. I am using 2/0 cable and had to trim the case a bit to make them fit. so make sure your wire and lugs are smaller than 2/0 or trimming will be necessary.
Reviewed in the United States on July 1, 2026 by bLuCrUz
    • Solid, durable and built to last.
Size: 300A ON/OFF 2 Position Color: Red
Used this on a travel trailer and installed it right on the battery box. Was easy to wire in and seems well made and durable. Connection posts are solid. I think this will hold up to the elements and is a good protection for my trailer. I did need to buy a different set of nuts and bolts for my specific application, but that was expected. ... show more
Reviewed in the United States on January 19, 2026 by Russell Burns
    • Very good quality
Size: 300A ON/OFF 2 Position Color: Red
This works very good, components are top notch, used as a master disconnect on an off grid solar system works perfect.
Reviewed in the United States on April 13, 2026 by Busy Dad
    • Good basic switch.
Size: 300A ON/OFF 2 Position Color: Red
This is a good simple, marine or automotive grade switch. My only complaint is that it only has dust or water panels on three sides. The fourth side is left wide-open to dust or water sprayer. Whatever. Switches like this generally have all four sides and closed and you cut notches around the cables as tightly as possible to help keep out water and dust, etc., I returned the first one thinking there was something missing yet the second one came exactly the same with one side of the switch wide-open to the elements ... show more
Reviewed in the United States on September 23, 2023 by WW
    • Hi-Quality Design, Sturdy Construction
Size: 300A ON/OFF 2 Position Color: Red
This DC electrical on/off shut-off switch is Hi-Grade and perfect for isolating (disconnecting) a battery on tractors and equipment to prevent any perisitic current draw, which could drain a battery dead. When ready to use the equipment, just turn on this switch. It is properly installed into the positive (red) cable where it is first connected to the post. There should be no wire/cable connections between the positive post and the shut-off switch. Any connections that could drain a battery should be wired "after" this switch. ... show more
Reviewed in the United States on February 14, 2024 by Half-Full
    • Easy and cheap disconnect
Size: 300A ON/OFF 2 Position Color: Red
Good solid switch. Easy solution for battery disconnect
Reviewed in the United States on January 24, 2026 by Jonathan H.
    • Most widely used power disconnect for Motorhomes.
Size: 300A ON/OFF 2 Position Color: Red
Review Image by LemonDrop Jeep
I added this in for control of my new LiFePo4 batteries to protect against charging/Discharging in very cold weather and during maintenance. You cannot work on this system without a way to disconnect all power positively! I have a Class A Motorhome and have not yet added solar (coming 2026). I will install another of these disconnects when I bring in solar. ... show more
Reviewed in the United States on December 31, 2025 by LemonDrop Jeep

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