Michael; Battery bank voltage at 75% SOC is around 24.7v, so it's in the ballpark and the battery bank has only about 3 years on it (8 x L-16) and not much abuse.
Dan Fink Adjunct Professor of Solar Energy Technology, Ecotech Institute IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer Executive Director, Buckville Energy NABCEP Registered Continuing Education Providers™ 970.672.4342 On Sat, Dec 10, 2016 at 10:34 AM, Shasta Daiku <[email protected]> wrote: > What is the battery voltage when the client says that SOC is %75? > > VFD driven pumps are three phase. There are single phase “soft start” > controllers for pumps and motors designed for that application, but not for > a two wire fed submersible pump. The pump, for mechanical reasons, not just > electrical, may may be resisting start up. > > Michael > > On Dec 10, 2016, at 9:11 AM, Dan Fink <[email protected]> wrote: > > Hi Bob; I checked the connections for corrosion, and the wire size looks > like "the usual" for up here in this area, it's only about 100 feet and the > usual well depth around here is 350 ft. Running stouter wire might be an > option to consider...but that's a lot of digging. I'm just hoping VSD might > be a quick and dirty solution. > > Dan Fink > Adjunct Professor of Solar Energy Technology, Scotch Institute be > IREC Certified Instructor™ for: > ~ PV Installation Professional > ~ Small Wind Installer > Executive Director, Buckville Energy > NABCEP Registered Continuing Education Providers™ > 970.672.4342 > > > > On Sat, Dec 10, 2016 at 9:53 AM, RE Ellison <[email protected]> wrote: > >> Don't know about the variable speed but are the wires feeding the pump >> large enough for the distance? >> Sounds like it might be voltage starved because of a high resistance / >> bad connection or a long wire run and the need for a larger wire ? >> >> Just a thought, >> Bob Ellison >> >> On Dec 10, 2016, at 11:39 AM, Dan Fink <[email protected]> wrote: >> >> Esteemed Wrenches; >> >> I have a client in a very remote mountain location who is having trouble >> with his inverter starting his well pump when battery state of charge is >> below 75%. 24v system, Magnum inverter. >> >> It's a 2-wire pump, unknown age, model, horsepower, or well depth. It has >> always given him trouble, that's why he upgraded to 24v, and the situation >> is better, but not ideal yet. I don't think adding a hard start capacitor >> would help as there should be one inside the pump itself, though I suppose >> it could be blown. >> >> Because of the distance and the rough road, it would be super expensive >> for a well company to come up there, pull the old pump and set a new, >> modern soft-start one. >> >> Has anyone here had any experience with retrofitting variable speed drive >> units to an unknown pump? If so, what models have you tried and what do you >> prefer? >> >> Thanks; >> >> Dan Fink >> Adjunct Professor of Solar Energy Technology, Ecotech Institute >> IREC Certified Instructor™ for: >> ~ PV Installation Professional >> ~ Small Wind Installer >> Executive Director, Buckville Energy >> NABCEP Registered Continuing Education Providers™ >> 970.672.4342 >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: http://www.mail-archive.com/re >> [email protected]/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: http://www.mail-archive.com/re >> [email protected]/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/[email protected]. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/[email protected]. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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