My setup:
- 50-amp RV with Onan 5500 generator
- Renogy 400 watt solar panels with Victron SmartSolar controller
- Battleborn 2x100 AH batteries
- Victron MultiPlus II 2x120 inverter charger
- Victron BMV-712 battery monitor.
I am troubleshooting a considerable voltage drop when running a microwave (150 Amp draw) and have found several sub-optimal details in the work done by the RV shop installer. This 300-amp fuse is installed between the battery (right terminal) and the inverter (left terminal). An IR thermometer shows that a spot on the fuse blade warms up to nearly 100 deg C!
The fuse is rated for 300 amps, but seems rather thin to be conducting such a load and has a voltage drop of about 0.2V across it. It is possible that the heat is coming from the cable and not from the fuse itself, but the cable lug does not heat up to the same degree.
My questions:
1. Is this kind of fuse appropriate? And is there a name for it?
2. Can I replace it with a push button circuit breaker like this one? (Example link: https://www.amazon.com/Hamolar-Circuit-Breaker-Manual-Holder/dp/B095YZN677 )
3. What should the fuse rating be? My highest typical load is about 160 amps from the two lithium batteries. Battleborn says that 200 amps is the normal current spec, with 300 amps for less than 30 seconds.
All suggestions are appreciated, especially for fuses / circuit breakers that are high quality and reliable.