In larger solar photovoltaic (PV) systems, multiple solar panels are connected in series in a string to increase the voltage before going to the inverter. Multiple strings of the solar panels are also combined together in parallel to produce higher output currents. A solar power combiner box is a device that combines the output of multiple strings of solar panels for connection to the inverter. This reduces the number of wires that need to go to the inverter. The solar combiner box houses the input over current protection fuses for several strings and the combined junction of the inputs into a larger capacity single main output set of wires.