Originally Posted by krabimike
just installed 4 - 6 volt deep clycle batteries 2 days ago. however when I charge with my Generator the 30 amp fuse for the inverter and charger keeps popping. when charge with the engine they charge fine. any thoughts as to what is causing the fuse to blow after charging for a short time?
Freedom 458-20 81-2022-12 12 V Hardwire (Single in/ dual out)
This model appears to have a 100 amp charger. Input AC power to the charger will decrease when pass through 120 volts AC becomes large. Total of the charger and the two 120 volt outputs will be limited to 30 amps.@ 120 volts.
There are three circuit breakers on this model. There is one 30 amp breaker on the “front” and a 15 and 20 amp on the back 130 volt output.
There may also be a 30 amp breaker in the RV main distribution panel. There may be more branch breakers on the sub panel distribution center (if one is installed in your unit).
Assuming the 30 amp breaker on the front of the inverter is the one that trips, there may be too much 120 volt AC out of the inverter/charger.
You said the breaker trips when using the generator. I expect it will also trip when using shore power.
See the manual linked above for testing instructions. Look in the installation portion of the manual.
Briefly, switch the two output circuit breakers "off" and try again.
If 30 amp breaker does not trip, then over load on the AC output is the issue.
If 30 amp breaker still trips, there is likely a fault in the inverter/charger.
There is a section on fault codes. See if you can narrow down the cause.