[RE-wrenches] Wattage 1/2 HP vs 1HP septic pumps

[Chris Mason]

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 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?
>
>
>
> ------------------------------------------------------------
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>
> Dana Orzel                       Great Solar Works, Inc.
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> 208.721.7003                       dana at solarwork.com
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> Idaho Contractor - # 028765          Idaho PV # 028374
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-- 
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