US-based PV installer RGS Energy (RGSE), which acquired exclusive rights to Dow Chemical’s third generation (3.0) solar shingles under the ‘POWERHOUSE’ brand, but using conventional crystalline silicon solar cells rather than the original CIGS (Copper, Indium, Gallium, Selenide) thin-film substrates, has included China-based PV manufacturer, Risen Energy as a key supplier.