... flat panel solar water heater Certificate: SRCC, Solar Keymark, CE and ISO9001 flat panel solar water heaterProduct introductionsThe split flat plate system contains solar flat ... , expansion vessel, pipings, connections, valves etc parts.The flat plate collector can be installed on the roof, wall, ... can be combined with gas boiler, oil boiler or electic heater.Size: 150L, 200L, 250L, 300L, 400L, 500L ...