Inverter Load Analysis [RE-wrenches]

[David Palumbo, Independent Power & Light]

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Barbra,

I have typically worked up system designs for both "winter" and "non-winter"
for my prospective clients. I have found that this helps educate people to
the reality of living off-grid in northern New England. The homeowners are
encouraged to install as much pv as they can afford. If they cannot afford
the optimum amount during the first phase then they will add pv as they can
afford it. I always recommend sizing the charge controller and the
transmission wire for a larger array.

Dave

-----Original Message-----
From: Barbra Kerr [mailto:bkerr at energy-exchange.org]
Sent: Friday, July 29, 2005 11:31 PM
To: RE-wrenches at topica.com
Subject: Re: Inverter Load Analysis [RE-wrenches]


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Jonathan-

Your comment about sizing for summer came as a surprise to me, as I was
trained to design for winter.  I understand all too well the rationale for
doing so, as I have lost too many bids in the low-competition off-grid
market in my area.

Question to all off-grid Wrenches:  Do you do this as well?  If sometimes -
What (besides the clients budget) is your determining factor to design
summer vs winter?

Thanks

Barbra K Kerr
President
Kerr Enterprises, Inc
1-800-886-2258

Jonathan's comment about sizing for summer
>>>
>> Ray-
>
> To keep costs reasonable, I usually size systems for summer conditions.
> When it's less sunny, they can supplement with the genny until they can
> afford more modules. customers tend to use a lot less power when the
> option is the generator.
> --
> Jonathan Hill, solar applications engineer
>
>

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