I so totally agree - during the winter there's not enough sun to make
a difference where we tilt the modules, and in the summer we dump
power anyway so we've set them for a nice spring/fall angle and
forgot about them for the last decade of so. The funny part is I
spent all kinds of extra dollars on my racking so it could adjust it
seasonally and through the day too. Never have done either with this
racking simply not worth the trouble.
Ezra
DragonSun Consulting
On 13-Aug-09, at 11:25 AM, Jeff Yago wrote:
I realize your client is set on doing this, but I installed
adjusting tilt racking on the 5 kW solar array I installed on my
home over 15 years ago and I can tell you after the first year of
adjusting these heavy sections I finally selected an average
position and they have not moved in 14 years.
I know there is a drop in the "calculated" performance between my
fixed mount and a semi-yearly tilt adjustment, but when you take
into account all the variations in weather, temperature, cloud
cover, system load, and battery state of charge, which are not
under our control, will impact system performance far more than
this tilt concern.
I say pick the best tilt angle that matches the season of year that
has the most system loading and forget about installing a high cost
adjustable mounting that most likely will never be used.
Jeff Yago
_____________________________________________________________
Netscape. Just the Net You Need.
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@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
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@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
