Check the listing for details. Off-grid Stand-alone Solar Hot Water DC Pump Station Run By PV Soalr Panel. Condition: New. Listed at 350.99 USD. Off-grid Stand-alone 2-Way Solar Pump Station With Air Vent & DC Solar Pump Run Directly by a Small PV Solar Panel The unit with 1” (180 mm) solar circulating pump, fully assembled and tested, consists of: Return Side: Flowmeter with flow regulation with filling and draining valves.Solar circulating pump specially made for the connection to the photovoltaic solar panel. Power supply DC 8-24V, 0,25-1,5A. max. 22W. IP42.Flanged 3-way ball valve with non return valve 10 mbar (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (range 0°C-120°C).Security unit 6 bar with manometer ø50 mm 0-10 bar with 3/4” Male connection to the expansion vessel. Supply Side:Flanged ball with non return valve 10 mbar (which can be excluded by rotating the handle by 45°) supplied with in-handle thermometer (coded red, range 0-120°C).Air vent provided with manual vent valve.Pipe with end connection. Centre distance 125 mm. EPP insulation box (Measurements: 277x425x150mm).A special back plate fixes the unit to the insulation box and it allows a quick fitting to the wall or to the solar cylinder.Constant temperature 120°C on the supply way (short time temperature: 160°C for 20 s). Max. temperature on the return way: 95°C.In the case of flow more than 8 l/min please check carefully the headlosses and compare them with the curve of the circulating pump.External connections: 3/4” Male