Blue Sea M-Series Battery Switch Spare Knob - Black
Blue Sea M-Series Battery Switch Spare Knob - Black
Genuine OEM Replacement with Ergonomic Grip & High-Visibility Pointer

DESCRIPTION
Genuine OEM Replacement Control for M-Series Marine and Automotive Isolators
Maintain the integrity and safety of your DC power distribution system with the genuine Blue Sea Systems M-Series Battery Switch Spare Knob in black. Over time, heavy usage, accidental impacts, or prolonged exposure to harsh marine and off-grid environments can result in damaged, worn, or misplaced switch selectors. Rather than undertaking the costly and time-consuming task of rewiring and replacing an entire battery isolator, this genuine spare part allows you to quickly restore full mechanical functionality to your existing switch body.
Engineered for Precision and High Visibility
Designed specifically to match the exact tolerances of the Blue Sea Systems M-Series range, this replacement control ensures a secure, slip-free engagement with the internal switch shaft. Unbranded or makeshift alternatives often suffer from poor fitment, which can lead to inaccurate switching positions, stripped splines, or complete failure when trying to isolate a battery bank in an emergency. This genuine component eliminates that risk, providing positive tactile feedback and reliable actuation every time you turn the dial.
The knob features a contoured, ergonomic grip profile that allows for effortless operation, even when wearing heavy work gloves or operating in wet marine conditions. A high-visibility white pointer and the distinctive M-Series logo are integrated into the face, offering clear visual confirmation of your current battery status in low-light lockers, boat bilges, or compact caravan electrical cabinets.
Key Features and Benefits
- Direct OEM Fitment: Engineered specifically for seamless compatibility with Blue Sea Systems M-Series mini battery switches.
- Ergonomic Grip Design: Deeply contoured edges provide superior leverage and slip resistance in wet or cramped environments.
- High-Contrast Indicator: Features a bright white directional pointer against a matte black finish for immediate visual verification of switch positions.
- Cost-Effective Maintenance: Restores full operation to your existing battery isolator without disturbing heavy-gauge cabling or mounting hardware.
- Colour-Coding Flexibility: Ideal for replacing a broken black dial or converting a standard red M-Series switch to black for sleek dash aesthetics or specific circuit identification.
- Important Note: This product includes the replacement control knob only; the complete M-Series battery switch body is not included.
Versatile Applications in 12V, 24V, and 48V Systems
Whether you are managing a dual-battery setup in a touring 4WD, maintaining house and start banks on a marine vessel, or organising a custom caravan power board, keeping spares on hand is essential for uninterrupted operation. Because the M-Series switch family is widely utilised across 12V, 24V, and 48V DC electrical architectures, this spare selector is an invaluable addition to any onboard toolkit. Additionally, many removable-knob M-Series switches utilise the selector as a security deterrent; keeping a backup stored safely onboard ensures you are never stranded due to a misplaced key knob.
Restore Your Battery Switch Today
Ensure your electrical isolation system remains safe, functional, and easy to operate. Order the genuine Blue Sea M-Series Spare Knob today to complete your system maintenance or equip your onboard spares kit for your next marine or off-grid adventure.
SKU: BS-7901200
SPECIFICATIONS
| Specification | Value |
|---|---|
| Product type | Spare knob |
| Compatible product range | M-Series battery switches |
| Colour | Black |
| SKU: | BS-7901200 |
| Model #: | BS-7901200 |
| MPN: | BS-7901200 |
| Package weight: | 0.024 kg |
| Package length: | 0.06 m |
| Package width: | 0.05 m |
| Package height: | 0.04 m |
WARRANTY
Blue Sea Warranty Policy
Blue Sea Systems products sold by us are supplied with a warranty against defects for the warranty period shown below, subject to the product type, application and the terms of this warranty policy.
The express warranty provided by us is limited to a maximum of 5 years from the original date of purchase, unless otherwise required under Australian Consumer Law.
Blue Sea Systems may offer longer manufacturer support on some products at their discretion
Warranty Lengths by Product Range
| Blue Sea Product Range | Warranty Length | Application / Notes |
|---|---|---|
| Most Blue Sea Systems Products | 5 years | Applies to most Blue Sea Systems products found to be defective in materials or manufacture. |
| P12 Battery Chargers | 5 years | Warranty period starts from the original date of purchase. |
| P12 Remote Displays | 5 years | Warranty period starts from the original date of purchase. |
| Digital Meters | 3 years | Warranty period starts from the original date of purchase. |
| Vessel System Monitors | 3 years | Warranty period starts from the original date of purchase. |
Warranty Assessment and Remedy
If a Blue Sea Systems product is found to be defective in materials or manufacture within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit or refund, depending on the nature of the fault and the requirements of Australian Consumer Law.
Products may need to be returned for assessment before a warranty claim can be approved. Where required, the product must be returned with dated proof of purchase and a clear description of the fault.
Labour costs for removing, replacing, reinstalling or diagnosing a product are not covered by this express warranty unless otherwise required under Australian Consumer Law.
Making a Warranty Claim
To make a warranty claim, please contact us with your dated proof of purchase, product details and a description of the fault.
The product may need to be returned for inspection before the claim can be assessed. If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy.
What This Warranty Does Not Cover
This warranty does not cover faults or damage caused by incorrect installation, incorrect application, misuse, abuse, neglect, unauthorised modification, accidental damage, normal wear and tear, environmental damage, or failure to use the product in accordance with the manufacturer's instructions.
- Incorrect installation or wiring
- Incorrect product selection or application
- Misuse, abuse or neglect
- Physical or accidental damage
- Water ingress or environmental damage outside the product's intended use
- Unauthorised modification or repair
- Normal wear and tear
- Labour costs for removal, replacement, reinstallation or diagnosis
- Freight, travel or call-out costs unless otherwise required by law
- Products not returned for assessment when reasonably required
Manufacturer Support
Blue Sea Systems may provide additional manufacturer support on some products beyond the warranty period listed above. Where available, we may assist customers in contacting the manufacturer, but any manufacturer support beyond the express warranty period is subject to the manufacturer's own terms and continued availability.
Australian Consumer Law
This warranty is in addition to other rights and remedies available at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

