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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 326 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, May 9
Order within 6 hours and 37 minutes
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Size: 300A ON/OFF


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

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

Operation Mode: Off,On-off


Current Rating: 300 Amps


Connector Type: Screws


Brand: Spartan Power


Terminal: Marine


Item Dimensions LxWxH: 3.25 x 3.25 x 3.6 inches


Mounting Type: Panel Mount


Actuator Type: Rotary


Contact Material: Copper


International Protection Rating: IP54


Product Dimensions ‏ : ‎ 3.25 x 3.25 x 3.6 inches; 9.88 Ounces


Item model number ‏ : ‎ SP-BS300A-RED


Date First Available ‏ : ‎ March 31, 2022


Manufacturer ‏ : ‎ Spartan Power


Best Sellers Rank: #17,106 in Automotive (See Top 100 in Automotive) #30 in Automotive Replacement Battery Switches


#30 in Automotive Replacement Battery Switches:


Customer Reviews: 4.6 4.6 out of 5 stars 136 ratings


Operation Mode: ON-OFF


Current Rating: 300 Amps


Contact Type: Normally Open


Connector Type: Screws


Brand: Spartan Power


Switch Type: Kill Switch


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 Amps


Contact Type: Normally Open


Connector Type: Screws


Switch Type: Kill Switch


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


Color: Red


Item Dimensions: 3.25 x 3.25 x 3.6 inches


Unit Count: 1.0 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


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, May 9

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.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great battery cutoff switch.
Size: 300A ON/OFF Color: Red
Highly satisfied with this battery cutoff switch. I have two on my boat for the batteries and they have performed excellent.
Reviewed in the United States on December 7, 2025 by Wes b

  • Solid, durable and built to last.
Size: 300A ON/OFF 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

  • Hi-Quality Design, Sturdy Construction
Size: 300A ON/OFF 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

  • Try it out before mounting
Size: 300A ON/OFF Color: Red
Does what it should but it is difficult to turn on/off. I recommend putting it in a location that is easy to access. Try it before you mount it.
Reviewed in the United States on December 16, 2025 by Jim H7uy

  • Easy and cheap disconnect
Size: 300A ON/OFF 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 Color: Red
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

  • Nice replacement
Size: 300A ON/OFF Color: Red
Perfect replacement. High quality.
Reviewed in the United States on January 1, 2026 by Jim

  • Well made
Size: 300A ON/OFF Color: Red
Quality kill switch
Reviewed in the United States on May 24, 2025 by Nick C

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