[SATLUG] Re: Any Technical/Automation - now PV

Bruce Dubbs bruce.dubbs at gmail.com
Mon May 24 11:17:30 CDT 2010

Borries Demeler wrote:

> Actually, I didn't have CPS install the grid, they don't do that. You get an installer
> that is approved by CPS. There is a wide range of contractors to choose from. My installer
> offered to install a battery backup unit, so I know it it definitely an option. In fact,
> I know several people did that in case of power outages so they can continue to run. And
> yes, you can use it to store excess power, but it is more costly to do that than
> to simply feed it back into the grid, since then you don't have to pay for the storage
> of it, but the meter essentially turns backwards, and every kwh you feed back into the 
> system you can get back for free later (say at night when there is no solar power, or 
> in the winter, when there is less light). So I think you misread the rules, or they
> are not stated clearly. It is definitely allowed to connect a battery backup.

I'd have a couple of concerns.  I wonder what the failure rate for the 
panels would be.  Is there maintenance required?   Are there homeowners 
association rules that would limit installation?  What are the effects 
on the appearance of the house?  How do trees that shade the house 
affect the economics of the effort?

That said, I do wonder about the issue of global warming in general.  I 
don't doubt that it is happening, but historical investigation has shown 
that the world has been warmer than it is now and 10000 years ago it was 
certainly a lot colder.  Someone from 10K years ago would think that 
we've already had a lot of global warming since then.


I don't know about the accuracy of the above graph, but I suspect that 
volcanic eruptions and solar output have a lot more influence on global 
temperature than carbon emissions.

   -- Bruce

More information about the SATLUG mailing list