Small AC motors and Inverters
Disappointed that my ancient Mod Sine Wave inverter (140W cont, 200W surge) shuts down with a 120W coffee grinder. Works ok with the 400W (cont) MSW inverter built-into the truck, though a little ...
Forum Discussion
pianotuna wrote:
...
Always size the fuse to the wire. Look for voltage drop of no more than 3% (I prefer 1% myself).
...brulaz wrote:
Inverter's surge rating current: ~2000W/12V=167A
Inverter's 5min rating current: ~1100W/12V=92A
So 100A Blue Sea MRBF fuse ???
Not really sure what "size the fuse to the wire" means.
Say #6 cable is 4' each for + and - leads, totalling 8'.
Inverter could draw 92A at 1100W for 5 min at 12V.
92A at 12V would cause a voltage drop of 2.5% (0.29)
A 100A fuse would allow 2.7% voltage drop over a long period.
But a 2000W Surge could have 167A and a 4.5% voltage drop, and the 100A fuse would allow that for a short time before blowing.
Is that safe?
