Sizing Solar Panel Fuses

Enter solar panel output voltage.

Sizing solar panel fuses.

Enter the total amps that your solar panels will produce all together. A spare fuse is recommended with with the purchase of a fuse holder. A wide range of voltage ratings and ampere ratings determine the solar panel fuse size. If you connect these panels in series there will be no increase in current flow so fusing is not required for this string.

The size of this fuse is dependent on how many solar panels you have and how they are connected series parallel or series parallel. The midget fuse sizes operate from 600 to 1500. Fusing solar panel arrays wired in parallel now in the case of 3 panels in series and 4 strings in parallel if one string shorts the max amperage to short is 39 12 which exceeds the 30 amp max current rating of the 10 awg wire. Click on calculate to see the size wire required in awg american wire gauge.

Fuses used in these systems are interchangeably known as pv fuse solar pv fuse fusible pv fuses and solar panel fuses. This means each seriesneeds a fuse breaker placed in the combiner box as shown here. Usually 12 24 or 48 volts. Atc fuses are used for dc loads.

Maxi fuses are typically used for charge controllers or smaller inverters. Solar panel fusing commercially made solar panels over 50 watts have 10 gauge wires capable of handling up to 30 amps of current flow. If the panels are connected in series the voltage of each panel is added but the amperage stays the same.