2" 370W Solar Submersible Pump with 400W Solar Panel with 40m Cable Package This 2" solar pump special deigned for 3" bore case. If your bore case is 4" or bigger, we recommend you get the 3" or 4" bore pumps as the screw rotors are stronger and last longer. This solar pump body diameter is 2"/50mm, it suitable for 3" bore hole slow water flow and lift water up to 80m. Daily water flow based on 6-8 hours peak sun per day in winter and 8-10 hours in summer. Below chart tested by 48V/DC. If pump works with 2 x 200w or 4 x 200w solar panels. the flow rate could less or more. It is easy to install, all plug and go. cost nothing to run after installation. This helical rotor pumps do not require expensive inverses and batteries to operate, however the controller will allow the use of storage batteries if required. You will have to get the following and NOT included in package - A stainless-steel wire (called safety cable) to hold pump in bore. If pump water from dam or river. A float set up is required. Panels frames to support solar panels. Poly pipe from pump to water tank. Extra power cable and waterproof cable joiner.