Lobel Solar Power Systems provides flat plate collector (FPC) solar water heaters. The key features are: - Inner tanks made of pure copper or stainless steel to prevent corrosion. Insulation of 100mm glass wool or 50mm PUF to maintain water temperature for 40-60 hours. - Copper collectors certified to BIS and ISI standards with brass flanges, EPDM rubber parts, and stainless steel fasteners. - Safety features include a multi-function safety valve to make the system safe with pressure relief, non-return, anti-vacuum and drainage functions. - Capacities range from 100-500 liters per day depending on the number of collectors (1