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🔴 Cut the power, not your adventures—Spartan Power keeps you in control!
The Spartan Power Battery ON/Off Disconnect Switch is a heavy-duty, ignition-protected rotary switch rated for 300A continuous current and up to 900A surge. Designed for 12V to 48V DC systems in RVs, marine vessels, and automotive applications, it features a simple 2-position knob, copper contacts, IP54 protection, and versatile mounting options with included screws. Trusted by professionals and DIYers, it extends battery life by safely disconnecting power when not in use.
| ASIN | B09WZF17KB |
| Actuator Type | Rotary |
| Best Sellers Rank | #40,384 in Automotive ( See Top 100 in Automotive ) #87 in Automotive Replacement Battery Switches |
| Brand | Spartan Power |
| Brand Name | Spartan Power |
| Circuit Type | Single Circuit ON-OFF |
| Color | Red |
| Compatible Devices | RV, marine, and automotive devices requiring 12V to 48V DC power supply |
| Compatible with Vehicle Type | RV, Marine, Automotive |
| Connectivity Protocol | X-10 |
| Connector Type | screws |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Control Method | Touch |
| Control Type | Knob |
| Current Rating | 300 A |
| Customer Reviews | 4.6 out of 5 stars 348 Reviews |
| International Protection Rating | IP54 |
| Item Dimensions | 3.25 x 3.25 x 3.6 inches |
| Manufacturer | Spartan Power |
| Material Type | Copper |
| Model | SP-BS300A-RED |
| Mounting Type | Panel Mount |
| Number of Items | 1 |
| Number of Positions | 2 |
| Operation Mode | ON-OFF |
| Part Number | SP-BS300A-RED |
| Switch Type | Rotary |
| Terminal | Marine |
| UPC | 810019984327 |
| Unit Count | 1 Count |
| Wattage | 14400 watts |
R**4
Good product.
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
B**Z
Works as advertised!
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.
R**S
Solid, durable and built to last.
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.
B**D
Very good quality
This works very good, components are top notch, used as a master disconnect on an off grid solar system works perfect.
W**W
Good basic switch.
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
H**L
Hi-Quality Design, Sturdy Construction
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.
J**.
Easy and cheap disconnect
Good solid switch. Easy solution for battery disconnect
L**P
Most widely used power disconnect for Motorhomes.
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.
Trustpilot
4 days ago
5 days ago