eXodus
Solar Addict
- Joined
- Jul 27, 2020
- Messages
- 1,482
48V system. 56V 160A APC alternator. WS500 Regulator.
200AH Winston cells.
Running at ~160A during commissioning, when, we think, the 200A Class T Blueseas fuse opened. Took out the alternator rectifier diodes (internal) and the WS500 regulator. Also opened the 15A ATC fuse to the regulator, destroying the sealed fuse holder.
Lessons.
More headroom for main line fuses. At least 50% more than expected load.
Consider slow blow fuses
Most spade fuses / holders don't cope with 48V systems(more than once)
There is no alternator protection for 48V systems. Only 24v / 12v
One of the reasons I recommend people on 12V system side to leave their Lead batteries in parallel with the LFP system.
The lead battery is always in the system - manufacturers actually in many cars/trucks/RVs don't even fuse from the alternator to the battery.
Yes no fuse from the alternator to the battery in most OEMs and that's for lead