[RE-wrenches] Grid-Tie Upgrade Problem

[Mick Abraham]

Conergy dealernet is showing BP 115's & 125's. Check that and Allan kindly
write me off list if you find those are indeed available/priceable from
Conergy. I need to series/match some Kyocera 120's so those might work...if
they're priced right.

Mick Abraham, Proprietor
www.abrahamsolar.com

Voice: 970-731-4675


On Thu, Feb 18, 2010 at 10:38 AM, Warren Lauzon <windsun at wind-sun.com>wrote:

>  The Vmp of those is 33.7 volts, so what you might want to do is just come
> up with a set of panels that would equal 10 of the SX120's within 5% or
> less. As I recall, the SX120's had a rather poor temperature coefficient
> compared to todays panels, so that might be hard to match up.
>
>
>
> ..................................................................................................
> Northern Arizona Wind & Sun - Electricity From The Sun Since 1979
> Solar Discussion Forum: http://www.wind-sun.com/ForumVB/
>
> ..................................................................................................
>
> ----- Original Message -----
>  *From:* Allan Sindelar <allan at positiveenergysolar.com>
> *To:* RE-wrenches <re-wrenches at lists.re-wrenches.org>
> *Sent:* Thursday, February 18, 2010 8:07 AM
> *Subject:* [RE-wrenches] Grid-Tie Upgrade Problem
>
> Fellow Wrenches,
> One of our first batteryless grid-tied installations needs an upgrade and I
> need to ask this list for suggestions re how it might be done.
>
> In late 2001 we installed two poles in the ground at a home. On one pole we
> mounted ten BP SX120s on a dual-axis Wattsun tracker. Input fed an SMA
> SB2500 inverter. The idea was that we would install 1/2 of the system then
> (what the customer could afford), with the infrastructure in place to add a
> second tracked array later. The system has worked flawlessly since then.
>
> Nine years (!) later the customer wants to add to the system, and I'd like
> to use the original approach if at all possible. We can fit up to around
> 1500 watts onto the existing inverter, but it must be in the form of ten
> 72-cell modules of similar Vmp, temperature deration coefficient, and fill
> factor. I am imagining ten 150W 24Vnom polycrystalline modules, but I don't
> know of any currently made.
>
> I thought it would be easy - ten Kyocera KC130s or KD135s, until a coworker
> pointed out that these are 12V modules - duh...
>
> Any suggested solutions out there?
>
> Thank you,
> Allan
> --
> <![endif]-->
>
> *Allan** Sindelar*
> Allan at positiveenergysolar.com
> NABCEP Certified Photovoltaic Installer
> EE98J Journeyman Electrician
> *Positive Energy, Inc.*
> 3201 Calle Marie
> Santa Fe, New Mexico 87507
> *505 424-1112*
> www.positiveenergysolar.com
>
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