[RE-wrenches] Wattage 1/2 HP vs 1HP septic pumps
Dave Angelini Offgrid Solar
offgridsolar at sti.net
Sun Oct 29 10:51:39 EDT 2017
My comment was blinking a "dimmed LED" the benchmark for testing this.
Most lighting does very well when it has the full 120vac on it.
The blink is pretty fast and does not always happen in my Outback and
Schneider users (which is weird to me). Typically it is a refrigerator
start on a 50% or less dimmed light circuit. Many people do not notice it
but the ones that do let me know!
Easily cured with an inverter based refrigerator or the fantastic
Panasonic inverter based microwave oven at Costco for a BOU. The BOU is
the same as BMU and they are the units of monetary value of $100. Basic
Offgrid Unit and Basic Marine Unit:)
I agree that the energy is about the same on the different pumps.
Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridsolar at sti.net
text 209 813 0060
Dave Darryl ThayerDave
> 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" <cometenergysystems at 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 <darylsolar1 at 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 <
>> offgridsolar at 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 offgridsolar at 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 dana at 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-bounces at lists.re-wrenches.org]
>> On
>> > > Behalf Of Chris Mason
>> > > Sent: Friday, October 27, 2017 5:51 AM
>> > > To: RE-wrenches <re-wrenches at 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 <dana at 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
>> ý
>> > >> 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 dana at 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.
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
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>> > >
>> > > --
>> > > Chris Mason
>> > > NABCEP Certified Solar PV Installerââ¢
>> > > Solar Design Engineer
>> > > Generac Generators Industrial technician
>> > >
>> > > www.cometsolar.com <http://www.cometenergysystems.com>
>> > > 264.235.5670
>> > > 869.662.5670
>> > > Skype: netconcepts
>> > > _______________________________________________
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>> >
>> > Dave Angelini Offgrid Solar
>> > "we go where powerlines don't"
>> > http://members.sti.net/offgridsolar/
>> > e-mail offgridsolar at sti.net
>> > text 209 813 0060
>> >
>> > _______________________________________________
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>
>
> --
> 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
> _______________________________________________
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Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridsolar at sti.net
text 209 813 0060
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