[RE-wrenches] Sunpower modules
Larry Crutcher, Starlight Solar
larry at starlightsolar.com
Thu Mar 19 21:14:09 PDT 2009
William,
I know you asked Jeff but thought I would respond as all we do are off
grid, battery based systems. I typically see that the Vmp voltage of
Sunpower modules is closer to spec with than with Kyocera, Sharp or
Mitsubishi. In my opinion Sunpower modules are only surpassed by
Sanyo. I realize this is anecdotal but after hundreds of installs you
begin to notice these things.
Larry Crutcher
On Mar 19, 2009, at 5:46 PM, William Miller wrote:
> Jeff:
>
> Have these modules worked for you in battery based systems?
>
> William Mill
>
>
> At 01:27 PM 3/19/2009, you wrote:
>
>> Hiya Jeff,
>> You are correct that the sunpower modules are positively grounded.
>> You are
>> also correct that sunpower only deals with dedicated "dealers".
>> That means
>> that if you are not one of their dealers you cannot get their
>> panels. It is
>> my understanding that sunpower is always looking for new dealers,
>> so you may
>> want to check in with them. As far as architectural review
>> committees and
>> such, we have never had a problem using SPR modules in the areas
>> where
>> review is an issue. The positive ground really does not affect
>> aanything.
>> Instead of your negative wire being the grounded (white) conductor
>> it is
>> your positive conductor that is grounded. This means you are
>> switching the
>> negative instead of the positive in the DC disco. Sunpower sells
>> packaged
>> systems, so they provide positive ground inverters from different
>> manufacturers.
>>
>> Evergreen now has a black framed module, and I believe Sharp does
>> too. I
>> hope this helps, any other questions feel free to contact me.
>> Jeff Blick
>> Lead PV Installer
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Options & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out participant bios:
> www.members.re-wrenches.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090319/4534c3e8/attachment-0003.html>
More information about the RE-wrenches
mailing list