Hybrid Car – More Fun with Less Gas

How many panels ? ( to run 230 volt sprinkler pump 30 minutes a day?) - Page 21

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Posted by Ron Rosenfeld on July 18, 2008, 2:07 am
 


Well, he's not handy.  When do you expect to have a working system for
sale?

A PV powered system would probably cost him a bit more than $,000 --
probably closer to 4-5000 but I haven't reviewed pricing lately for the
components.
--ron

Posted by Morris Dovey on July 18, 2008, 2:57 am
 
Ron Rosenfeld wrote:


I wish I could give you a better answer - but I just don't know.
Development speed depends on available resources, and they've been
shrinking steadily. We're aiming for a 40% efficiency level, but we'll
probably consider that we actually have a product at the 35% level. If
you'd like I can send you an e-mail when we get there.


Ouch - it'd be good to see PV system prices shrink a bit faster.

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/

Posted by Ron Rosenfeld on July 18, 2008, 11:37 am
 

Yes, it would.  Right now, the PV component is probably about 1/2 the cost
of the system.  It'd be nice to see the pump prices come down also.  But
they seem to be going up.

Please post back here when you're ready for prime time and have good
specifications.  

I know my friend does not want to do developmental work.  If he installs
anything to replace his generator, it'd need to be a finished product with
a predictable output.
--ron

Posted by Morris Dovey on July 19, 2008, 2:41 pm
 Ron Rosenfeld wrote:


Of course. As with a PV/pump system, the specs probably won't be all
that reliable until someone starts guaranteeing minimum (or even
average) insolation.


Um, yes - for predictability, he's going to find it difficult to improve
on the generator setup he already has. On the other hand, it's fairly
difficult to improve on the cost of sunshine.

It's all about making good trade-offs: insolation, collector area and
efficiency, pump capability, tank capacity, and usage/demand.

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/

Posted by Ron Rosenfeld on July 19, 2008, 5:51 pm
 

There's enough data available these days that you can plan for worst case
scenarios with a pretty high assurance of reliability.


I think he'd be willing to trade a 1% chance of having to run his generator
-- and that's pretty easy to predict.  Even generators break down from time
to time.


Yup, everything is a tradeoff.
--ron

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