MRBF Terminal Fuse
Sold by Renogy UK
From £14.99
Renogy UK's price when we last checked, on 2 September 2026. They run promotions and price by variant, so confirm the current price on their page before you buy.
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Delivery and returns
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Warranty and support
The manufacturer's warranty is handled by the seller you buy from. If something fails, raise it with them and quote their order number — we cannot open a claim on your behalf.
Happy to help you work out whether a part is right for your build: get in touch, or run the numbers through the free electrical calculator.
Overview
MRBF Terminal Fuse
A terminal fuse that bolts directly onto the battery post, in 30A to 400A. The neatest way to fuse a battery, because it removes the unprotected cable between the post and the fuse entirely.
- 30A to 400A, eleven ratings available
- Mounts directly to the battery terminal
- Compact — no separate holder to find space for
Zero unprotected cable
Every other fusing arrangement leaves a short length of live cable between the battery post and the fuse that nothing protects. An MRBF fuse sits on the post itself, so protection starts at the source. On a lithium bank capable of delivering hundreds of amps into a fault, that is the difference between a blown fuse and a fire.
Choosing the rating
Size it to the cable it protects, above the maximum continuous current the circuit will actually draw. For an inverter feed, work from the DC side: roughly 180A for a 2,000W inverter at 12V, 270A for a 3,000W. Then confirm the cable is rated above the fuse.
Before you order
Check your battery's terminal type and bolt size before ordering — MRBF fuses mount on a specific stud arrangement, and not every battery post suits them without an adapter.
Renogy's published figures
Taken from Renogy's own specification for this product, on the date shown by the price. Anything wired into 230V mains should be signed off by a qualified electrician.
Build notes for this part
Get the sizing and fitting notes.
Useful product advice, installation considerations and occasional offers for this part of your van build.