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What size fuse should be placed between my (soon to be owned) Victron 150/60 mppt? The controller will be charging 2 in series 12v batteries equaling 24v 100AH.
If the answer depends upon wire size, would you please specify what wire size I should use? The 150/60 will be about 6 feet away from the battery bank.
Thank you
If the answer depends upon wire size
The fuse rating only depends on the wire size that fuse is supposed to protect. The fuse should blow at a current which the wire can still safely carry. But it should not blow at a normal current (maximum current that wire is expected to carry).
SmartSolar 150/60 can charge the battery with maximum 60A. The battery terminals can take wires up to 35 mm^2 / AWG 2 (copper). For short wires (and hanging in the air, not enclosed in conduit), you can use 25 mm^2 /AWG 4 (copper). Of course, cross-reference with the wire manufacturer data before buying.
If you have a smaller PV array - less than 1700W for a 24V system - (which would never be able to generate enough power and as a consequence the charger will never be able to charge with 60A), then you can use smaller wires (smaller cross-section).
The 150/60 will be about 6 feet away from the battery bank
Is that the distance in straight line between the charger and the battery or the actual wire length (positioned in place)?
I think it is more important to first know how fast you are allowed to charge your batteries. With most lead acid batteries this around 10% of the total capacity which would be 10 Amps in your case. So, if you charge with 10 Amps you could use a ± 10 amp fuse.
My batteries are Battle Born LiFePo 12v 100ah which will be put in series.
The reason I got a Victron 150/60 is because I will probably be adding more panels to the array in the future once I see how the current design operates.
