Hoffman/Pentair Technical Products supplied critical components to OneSource Distributors, Orange, CA and their integrator partner Custom Process Solutions, Lake Forest, CA for the development of an ETL listed combiner box assembly that satisfies the new UL 1741 standard at 1,000 VDC. The combiner box is the first 1,000 VDC box inNorth Americato meet the new photovoltaic standard certification