[RE-wrenches] Seasonal Adjusters

[Ezra Auerbach]

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
>
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