Hi, Dana, I know you have a different situation using a sewage ejector (grinder pump) but I have a customer that has a 1/2 HP well pump. I do not know the drawdown, I think it is 60 feet. It runs from an Outback VFX 3648, and a 4000 Watt autotransformer standard across the line starter. It has never failed to start. Nor does it "blink the lights", (running since 2004?) It runs at 350 to 400 watts into a 20-gallon diaphragm tank operating from 40 to 60 PSI. Using Egauge on the 10 Minute scale, the peak seems to be about 3x the running load or 1200 to1500 Watts lasting less than 1 second. In providing a family of two adults, the well pump is not a dominating load. On the other hand, I had a customer with a 1.5 HP pump that I could not reliably start on a similar setup with a single FX 3548. The Radian is, of course, a much bigger animal.
On Fri, Oct 27, 2017 at 3:45 PM, Dave Angelini Offgrid Solar < [email protected]> wrote: > I am with Windy! Having 1/2 HP and up anywhere offgrid is a problem if it > does not soft start. It will cause dimmed LED's to flicker and just the > surges that really are avoidable. Use soft start! There is not a reason > these days to prove that a Radian or XW will start a motor that bangs the > inverter to start. The only case I make for large old pump tech like these > is if it is for a fire suppression pump, in addition to a nice 3/4 HP > Grundfos home water pump. > > Dave Angelini Offgrid Solar > "we go where powerlines don't" > http://members.sti.net/offgridsolar/ > e-mail [email protected] > text 209 813 0060 > > > > Really good to hear & thanks Chris. > > I just installed this system at our new home that we will be showing as a > > demonstration home. I come from the late '80s days of PV and a 1 HP pump > > was a major no-no back when. > > *Windy passed along a soft start suggestion & I was going to put a time > > clock turning on from 10AM-2PM every day to utilize a fuller bank. I will > > look at the SOC option on the Radian, but it is 200+' away from the > septic > > controller and conduit is in the ground. > > We have a HUP 2500 AHR/48-volt bank & 6,400 watt of PV tracked in a n-s > > canyon that limits the PV collection to 5 hours on a December day, that > so > > far even running a 3/4 HP air compressor all day/every day-7 days a week > > has never dropped at night more than 5%. > > > > ------------------------------------------------------------ > ---------------- > > Dana Orzel Great Solar Works, Inc. > > 208.721.7003 [email protected] > > Idaho Contractor - # 028765 Idaho PV # 028374 > > NABCEP # 051112-136 www.solarwork.biz > > "Responsible Technologies for Responsible People since 1988" > > ï Please consider the environment before printing this email. > > > > > > -----Original Message----- > > From: RE-wrenches [mailto:[email protected]] On > > Behalf Of Chris Mason > > Sent: Friday, October 27, 2017 5:51 AM > > To: RE-wrenches <[email protected]> > > Subject: Re: [RE-wrenches] Wattage 1/2 HP vs 1HP septic pumps > > > > What's the problem with the 1H pump you anticipate? We live on a 8KW > > Radian and it's very robust. We have load management relay system to > > handle the dryer, it's only allowed to work above 95% state of charge. > > Since your lift station has range, i.e., it doesn't have to work every > > minute of the day, you can control it so it works only during a SOC range > > or Time of Day range. You can also turn off other loads so there is > enough > > power. If you run the lift pump during the night, there is less chance of > > a convection oven running at that time. Or mid morning when everyone is > at > > work. Having time control or SOC control is very handy. > > > > On Wed, Oct 25, 2017 at 9:37 PM, Dana <[email protected]> wrote: > > > >> Ok all you whiz kids, bozos, & bolos: > >> > >> > >> > >> If I have a septic lift pump [off grid ouch] at 1HP/240 vac/8-amps to > >> meet all the usual state required overkill in septic design & a ½ > >> HP/240 vac/4.9-amp pump would do the same job but it will take 10% > >> more time to dose 800 gallons. > >> > >> Powered by an 8 KW Outback Radian inverter. > >> > >> From a load point of view and a 240-volt 3 phase wild AC well pump > >> limiting the overall surge and general wattage is the smartest move, > >> but; Which pump will use less overall power? We are using 240 volt to > >> utilize both inverters and drop the load on either half of the Radian > >> inverter. > >> > >> Is there a smarter lift pump to use? ECM motor? Permanent magnet? > >> > >> > >> > >> ------------------------------------------------------------ > >> ---------------- > >> > >> Dana Orzel Great Solar Works, Inc. > >> > >> 208.721.7003 [email protected] > >> > >> Idaho Contractor - # 028765 Idaho PV # 028374 > >> > >> NABCEP # 051112-136 www.solarwork.biz > >> > >> "Responsible Technologies for Responsible People since 1988" > >> > >> P Please consider the environment before printing this email. > >> > >> > >> > >> > >> > >> _______________________________________________ > >> 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 > >> > >> > > > > > > -- > > Chris Mason > > NABCEP Certified Solar PV Installerâ„¢ > > Solar Design Engineer > > Generac Generators Industrial technician > > > > www.cometsolar.com <http://www.cometenergysystems.com> > > 264.235.5670 > > 869.662.5670 > > Skype: netconcepts > > _______________________________________________ > > 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 > > > > > > > Dave Angelini Offgrid Solar > "we go where powerlines don't" > http://members.sti.net/offgridsolar/ > e-mail [email protected] > text 209 813 0060 > > _______________________________________________ > 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]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
