A Lorentz PS200/HR04 pump can run directly from his 24V battery bank at ~1.2 gpm. Much more efficient than inverting and stepping up AC.
Best regards, Mark Dickson, NABCEP Certified Solar PV Installer T Oasis Montana Inc. 877-627-4768 toll-free 406-777-4309 (0830 fax) <http://www.oasismontana.com/> http://www.oasismontana.com/ <http://www.grid-tie.com/> http://www.grid-tie.com/ <http://www.pvsolarpumps.com/> http://www.pvsolarpumps.com/ _____ From: [email protected] [mailto:[email protected]] On Behalf Of Jason Szumlanski Sent: Tuesday, November 02, 2010 1:43 PM To: RE-wrenches Subject: [RE-wrenches] Solar/Batt Well Pump Recommendation Request I have a customer with an existing grid-tied PV system with battery backup (24Vdc). The inverter feeds a (120V only) critical load subpanel. He has a 240V well pump with 85' total lift and a 4" well. Originally he came to me looking for a PV direct solar well pump. Immediately I thought about just using a step-up transformer to handle the 240V well pump on his existing system, saving a lot of cost (he does not need additional PV to handle the pump load and the inverter is capable of running the pump). Now I think the better solution is to get him a DC well pump to run directly off his existing battery bank. I would just need to add a LVD. If he wants to add more solar, we can tackle that separately. Any thoughts on my approach, and anyone with a recommended pump model off the top of their head? Jason Szumlanski Fafco Solar
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