solar fuses
What fuses are you guys using to connect you solar panels to controller and controller to battery's?
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Muddydogs wrote:
What fuses are you guys using to connect you solar panels to controller and controller to battery's?
Don't know if yours is PWm or whether this would make a difference, so I will speak of MPPT.
No fuses panel to controller. Shorted input of MPPT won't trigger a fuse anyway, because Isc of PV is only marginally higher than Imp. It is desirable, however, to have a switch for PV disconnect. So I simply installed a breaker slightly exceeding Isc. It can be used as a switch, and it works as a resettable fuse.
Fuses or breakers after controller don't matter what type, it only matters what current. I have all Pos wires before battery coming to a common Pos bus. There is a "battery fuse" mounted directly on the battery terminal: Blue Sea terminal fuse block. And there are breakers (you may have fuses if you like) in all the Pos wires coming to that common Pos bus: MPPT output, trailer loads, etc etc. This is how it should be done - with a common Pos bus. In a decent controller such things are explained in the manual.
