... contains solar flat plate collector, storage water tank, pump station with controller, expansion vessel, pipings, connections, valves etc parts. ... heater.Size: 150L, 200L, 250L, 300L, 400L, 500L with single coil or double coils inside tank.Specification:1) 150L ... system with 2m2 collector2) 200L system with 5m2 collector3) 300L system with 6m2 collector4) 400L system with 8m2 collector5) 500L ...