Circuit breaker or fuse?

[dodge_guy]

So. I’ll be installing a 3000W inverter and with that, what is better? A 300A circuit breaker or an ANL fuse? I like the circuit breaker so I don’t have to keep spare fuses and a circuit breaker will be easier to just reset.

[ktmrfs]

dodge guy wrote:
So. I’ll be installing a 3000W inverter and with that, what is better? A 300A circuit breaker or an ANL fuse? I like the fuse so I don’t have to keep spare fuses, but a circuit breaker will be easier to just reset.

look at or estimate what the MAX short circuit current of your battery bank could be. Make sure whatever fuse or breaker you choose will interupt that current level.

When I did checking for my install of a 1000W inverter, ANL fuses worked, most reasonably sized, affordable, obtainable circuit breakers weren't spec'd for the battery bank short circuit current capability.

[KD4UPL]

I would want a way to disconnect power to the inverter quickly in an emergency. A breaker allows for that. I'm not sure why you think you wouldn't need a spare fuse. I would think a spare would be a good idea. Sometimes inverter go a little crazy and power cycling them will reboot the processor and make it work again. It's a lot easier to power cycle with a breaker as well.