The Dow Powerhouse solar shingle, manufactured by Dow Chemical, has received Underwriters Laboratories (UL) safety certification after passing over 50 individual tests to measure its safety and building standards. UL testing included wind and fire resistance testing as well as validating proper wiring and PV connection. The Dow Powerhouse shingle achieved UL 746, 1703, 1897, 790, 486 and 514.