Century Ventures offers combiner boxes that provide interconnection between the input leads from the solar PV modules, and the output lead going from the combiner box to the charge controller. The combiner box is customized for different configurations, based on the number of strings of solar PV modules used in the layout. For a set of 10 PV modules arranged two in series and five in parallel, a 5:1 configuration combiner box is selected. The combiner boxes provide fuse and surge protection in case of lightning attacks.