I have a 2009 Heartland Big country 32.5 ft. I need to replace the battery circuit breaker but I am unable to determine the correct amperage. The old circuit breaker does not have any markings on it so I don’t know the correct amperage to replace it with. The converter is IntelliPower, 60 amp output
Correct amperage for battery circuit breaker
- Thread starter GAWKN
- Start date
wdk450
Well-known member
I would think that the breaker should match or the rating of the charging device (60 amps), especially if it is a manual reset type. 60 amps breaker at 12 volts, is not a commonly available size, though. The 50 amp breaker is a common size. The converter/charger usually has 3 20 amp fuses in parallel to give a 60 amp output protection, though. As soon as 1 of the 3 fuses in parallel blows, there will be over currents on the 2 other fuses, and they should blow too. Having the main 50 amp fuse between the converter/charger and the battery be a MANUAL RESET TYPE is a fire safety precaution to keep a reoccurring over current condition continually resetting and heating up the wiring. Unfortunately, from the many postings about this breaker tripping on this forum over the years, this can be a source of nuisance trips that you don't discover until you are boondocking without shore power, and discover that your 12 volt battery supplied system doesn't work, and your battery is nearly (or is completely) dead from a lack of charging when connected to shore power.
