Battery short circuit protection?
I've been working on a solar system and 2000w inverter install. Lots of wiring. Lots of heavy duty cables (inverter to batteries). I've also got a battery monitor set up which uses heavy duty cabli...
Forum Discussion
Fuses are selected based on the wire size and expected loads, whichever is less. Any short circuit will result in higher amperage through the cables and will blow the fuse.
For example, you mentioned a 2000W inverter. However, most inverters will tolerate some level of surge. If 2000W is the surge capacity, divide by 12V and get 167A. So a 175A or 200A fuse would be about right. If there are more loads on the cables, add that amperage to the 167A and find the next higher fuse.
Now take the fuse size along with the cable run distance to one of the many online cable size calculators to determine the appropriate cable size.
For example, you mentioned a 2000W inverter. However, most inverters will tolerate some level of surge. If 2000W is the surge capacity, divide by 12V and get 167A. So a 175A or 200A fuse would be about right. If there are more loads on the cables, add that amperage to the 167A and find the next higher fuse.
Now take the fuse size along with the cable run distance to one of the many online cable size calculators to determine the appropriate cable size.
