You will not find a specific "solar pump" in that range, but that's normal. Pick the best standard 3PH pump that you can, through local channels - NOT with variable frequency drive. The solar controller will be your VFD. Nowadays, any pump motor is almost sure to be "inverter rated" for use with VFD. Be sure it is.
When picking the pump, you would normally pick one that is working around the peak of its efficiency curve at the TDH that you need (including pipe loss). In this case, pick one that peaks efficiency at least 20% higher TDH, so it will perform relatively well at reduced speeds. Remember, the pipe friction will greatly reduce at lower flow, so that's on your side. Next, find a controller, also know as "solar pump inverter". Numerous companies make them, Grundfos, Lorentz, etc. The Chinese have done much of the pioneering on these, so some of them are good. I don't know who to send you to, but welcome you to keep in touch with me. Regarding array design, I can give you the general equation for pumping power if you need, based on best-guess pump efficiency. Otherwise, locate the pump and read the power requirement. We (my co-authors) are generally recommending at least 40% oversize on the array. Tracking or further oversizing is very advantageous because centrifugal pumps loose efficiency rapidly as they slow down. Tracking OR a double E-W facing array will allow use of a smaller pump AND smaller pipe, which may be a big saving if adequate pipe is not already in place. The double array is also called "fixed tracking" - can be economical if PV cost is low enough. I hope this will lead you in a good direction. Wind Dankoff The Handbook of Solar Water Pumping (to be published next year) Co-author _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
