I'm trying to figure out the right fuse size for my 48V inverter, which is rated for 2000 watts continuously and can peak at 4000 watts. Based on what I've read, I think I need a 60 amp fuse, but I'm not sure what type of fuse I should use. Can anyone offer advice?
2 Answers
If you plan to run electric motors or anything with a motor start-up, keep in mind they often pull a lot more current at start-up. If that's the case, you might trip fuses more often than you'd like, especially with your air conditioner being a peak load. Just make sure to overestimate a bit, so you don't run into issues.
It's always best to check the manufacturer's manual first; it should give you the specific recommendations for fuse size and wiring. Generally, if you calculate it out, for a 4000W inverter you’d be looking at about 104 amps for continuous use, but if you're just using it at 2000W then a 60-amp fuse is likely sufficient. I’d recommend a 60 amp Class T fuse close to the batteries, as those are durable and can handle large fault currents without issues.
Sounds good! What about using a Mega Fuse for those lower amps?