If you connect these panels in series there will be no increase in current flow so fusing is not required for this string.
Inline fuse for solar panel.
However we do recommend to add fuses to prevent any mishaps.
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.
Fusing solar panel arrays wired in parallel.
The size of this fuse is dependent on how many solar panels you have and how they are connected series parallel or series parallel.
We recommend adding two different fuses in the following scenarios.
This means each series needs a fuse breaker placed in the combiner box as shown here.
Between the charge controller and battery bank solar connector inline fuse between the charge controller and solar panels anl fuse set fuse.
In this case the battery wires and ac dc inverter will be safely disabled by the fuse.
Witproton solar pv fuse connector ip68 waterproof 1000v in line fuse holder for solar panel and inverter in photovoltaic system male female with 1 fuse 30amp fuse connector 4 3 out of 5 stars 6 15 99 15.
If the panels are connected in series the voltage of each panel is added but the amperage stays the same.
Commercially made solar panels over 50 watts have 10 gauge wires capable of handling up to 30 amps of current flow.