Fw: Need a Deep Well Pump Solution [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

<x-flowed>
>Windy,
>can you give me an estimate of the number of BP85s that I would have to
>rewire/divert to run the pump? Would it be four? And expected gpm?
>I'd like to try to compare pump efficiencies. The Solamotor man estimated
>10A at 24VDC to run the jack pump at 1/2 gpm. That's a surprisingly high 8
>watthr/gallon figure.
>
>Thanks,
>Allan


Allan,

This is for a 350 foot lift. You are proposing to divert a rated 340 
watts of PV.

I'm looking at our ETAPUMP Integrated Systems Sizing Table. We offer 
a 300 watt and a 480 watt system. I'll simplify the matter by looking 
at the 300 watt system.

System # ETA-04H-300, at 350' lift, will pump 2.5 GPM.  (with 480 
watts, it speeds up to 3.4 GPM, so with your proposed array of 340 W, 
you will get nearly 3 GPM.

The 300W system has an ultimate capacity of 525' Whis is good to know 
in case the well drops further. Submersion depth is not limited and 
is insignificant.



Now, let's compare to the Solamotor jack system. I ASSUME he means 
you need 10A rated array at nominal 24V PV-direct. That about 10A X 
34V = 340 watts array rating. That is surprising, in relation to a 
yield of 1/2 GPM. There might be a miscommunication somewhere.

Nevertheless, Solamotor is exotic compared to a submersible, and you 
can't use a pitless adapter so it would require a well pit (in 
well-drained soil) to prevent freezing, which is a substantial added 
cost.



Next, let's think about efficiency compared to an AC pump running 
from the battery system. We do have the same ETAPUMP available for 
battery systems. Here is performance for the same helical rotor pump 
end and motor, operating from a 48V battery system. (We don't yet 
have a full-power 24V model, but for this comparison, we need only 
consider watts).

ETA-HR04H-48V at 350 feet will pump 2.7 GPM drawing 323 watts from 
the battery system.

How does that compare with the AC pumps you have considered?

Windy

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com

==^================================================================
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email to: RE-wrenches-unsubscribe at topica.com

T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================


</x-flowed>