Sizing Solar Panel Fuses

If you connect these panels in series there will be no increase in current flow so fusing is not required for this string.

Sizing solar panel fuses.

Click on calculate to see the size wire required in awg american wire gauge. This means each seriesneeds a fuse breaker placed in the combiner box as shown here. Enter solar panel output voltage. The size of this fuse is dependent on how many solar panels you have and how they are connected series parallel or series parallel.

Enter the distance in feet from your solar panels to your battery bank charge controller. Mini fuses are typically used for small system components like battery management systems or monitors. If the panels are connected in series the voltage of each panel is added but the amperage stays the same. Usually 12 24 or 48 volts.

Fuses used in these systems are interchangeably known as pv fuse solar pv fuse fusible pv fuses and solar panel fuses. A solar fuse is a special purpose fuse used in photovoltaic pv or solar power systems. The midget fuse sizes operate from 600 to 1500. A spare fuse is recommended with with the purchase of a fuse holder.

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. Solar panel fusing commercially made solar panels over 50 watts have 10 gauge wires capable of handling up to 30 amps of current flow. Enter the total amps that your solar panels will produce all together.