But the question you asked as to which uses more energy, i expect they use tbe same or close to the same, the 1/2 hp runs 2x longer.
On Oct 29, 2017 6:24 AM, "Chris Mason" <cometenergysyst...@gmail.com> wrote: If you can get the Class rating of the motor, it will tell you a lot about the start current requirements of the pump. On Sun, Oct 29, 2017 at 4:29 AM, Darryl Thayer <darylsol...@gmail.com> wrote: > 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 < > offgridso...@sti.net> 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 offgridso...@sti.net > > 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 d...@solarwork.com > > > 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:re-wrenches-boun...@lists.re-wrenches.org] > On > > > Behalf Of Chris Mason > > > Sent: Friday, October 27, 2017 5:51 AM > > > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > > > 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 <d...@solarwork.com> 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 d...@solarwork.com > > >> > > >> 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: RE-wrenches@lists.re-wrenches.org > > >> > > >> 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-wrenc...@lists.re-wrenches > > . > > >> 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: RE-wrenches@lists.re-wrenches.org > > > > > > 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-wrenches@lists.re-wrenches. > > 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: RE-wrenches@lists.re-wrenches.org > > > > > > 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-wrenches@lists.re-wrenches. > > 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 offgridso...@sti.net > > text 209 813 0060 > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > 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 > > > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. > > 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: RE-wrenches@lists.re-wrenches.org > > 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-wrenches@lists.re-wrenches. > 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 Installer™ 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: RE-wrenches@lists.re-wrenches.org 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-wrenches@lists.re-wrenches. 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: RE-wrenches@lists.re-wrenches.org 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-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
