battery and solar panel fuses

[ghostlymoron]

What sort of fuses should one use in these situations?

 

[pvb]

I like Megafuses for battery cable protection.

 

[Trundlebug]

My MPPT controller came fitted with a 20A blade fuse (automotive type).

I have a 100A fuse fitted to the battery box for the domestic feed to the boat.

Not sure what you're really asking as fuse size will depend on capacity etc?

 

[VicS]

What sort of fuses should one use in these situations?

The solar panel connection should have a fuse which is higher than the max expected charging current but should be smaller than the safe current rating of wiring to the solar panel and controller. Since the wiring will be quite heavy to avoid volts drop it makes sense that the fuse rating will be closer to the max charging current than to the max safe current rating of the wiring.

 

[ghostlymoron]

I know that the battery fuses need to be as close to the battery as possible and presumably rated at the current carrying capacity of the battery cables. I'm just interested what make and pattern of fuse people use for these. My solar panel has an inline connector which I think may hold a fuse. Should the fuse be before or after the controller? It's a 20w panel so probably 2a would do?

 

[VicS]

. My solar panel has an inline connector which I think may hold a fuse. Should the fuse be before or after the controller? It's a 20w panel so probably 2a would do?

The fuse should be as close as practical to the connection to the battery system so that all the wiring is protected from the potentially very high currents which the battery could supply in the event of a short circuit occurring in the wiring.

2A will be adequate..... personally would feel tempted to go a little higher but not by much.