Rekcharge 100A Inline Waterproof Resettable Circuit Breaker

Resettable circuit breakers are a smart move for main power lines because they can be flicked back on once a fault is cleared. Unlike standard fuses, you do not need to carry physical spares or fumble with small parts in the dark if a circuit trips.

They act as a high quality safety switch for your system. If an overload occurs, the breaker trips and cuts power immediately to protect your wiring. Once you have fixed the issue, a simple press of a button or lever restores power. This is particularly useful for critical gear like a winch or a main canopy feed where a blown fuse would otherwise stop your trip.

Explore our Power Distribution Boxes to see how to centralize your circuit protection.

MIDI fuses are often preferred for dual battery links because they use a secure bolt down connection that is highly resistant to vibration. Circuit breakers are better for accessories or circuits that might experience occasional overloads, providing the convenience of an easy reset without replacing hardware.

In a dual battery setup, the main link between the starter and auxiliary battery usually faces constant current flow for hours. MIDI fuses offer a very low resistance path and are less likely to trip due to engine bay heat. Many travelers use a MIDI fuse for the main charging line and circuit breakers for canopy outlets or lighting circuits. This provides the best balance of stability and convenience.

Match your protection to your charging hardware by browsing our DCDC Chargers collection.

A 2000W inverter pulling from a 12V bank requires a 200A or 250A circuit breaker to handle the massive current draw. To find the correct size, you divide the maximum wattage by the lowest battery voltage and add a 25 percent safety margin for peak startup loads.

Using a breaker that is too small will cause it to trip every time you turn on a high draw appliance like a coffee machine or kettle. The breaker must be rated to handle the peak current of the inverter while still being sized to protect the heavy gauge cable you have installed. It is a critical safety link that prevents your main battery leads from overheating during heavy off grid use.

Find a high performance unit in our Inverters collection to see your power requirements.

Many high quality 12V circuit breakers are built with weather resistant housings, but you should verify the specific IP rating before mounting them under the bonnet. While they handle splashes and dust well, the internal mechanisms can eventually be affected by constant exposure to high pressure water or extreme engine heat.

For under bonnet use, look for breakers that feature a sealed design and protective terminal caps. Mounting them in a high, dry location away from the exhaust manifold helps prevent premature failure. Regularly checking for red dust buildup or signs of corrosion on the terminals will keep your master protection functioning correctly during long outback hauls. This simple maintenance prevents a small fault from cutting power to your entire auxiliary setup.

Explore our range of gear to find the right protection for your next adventure.