OK! We've had the system turned on for one full year now!
Time for an annual report....
Here are the simple numbers:
Total generated for the year:
4926 kWh
Total put into grid:
4313 kWh
Total used from grid:
2345 kWh
Simple difference:
1968 kWh
Calculated current surplus with RG+E:
2751 kWh
(This includes some paid kWh's during low months and some from the first installed month's bill, before the system was turned on.)
This graph shows Oct 08 through Sep 09 (excludes the few days in October that make up the end of the 1 year)
Our estimated output (total generated) was
4687 kWh for the year.
So, with the system hitting
4926 kWh, we beat the estimates by
239 kWh....not too bad!
Also, our total usage for the year (from the grid and from the panels combined) was only about
2929 kWh!
The system was originally sized to provide about
109% of our demonstrated usage (which, for the previous year, was somewhere around
4830 kWh)
So, we were able to cut our usage down by about over
1900 kWh!
We actually produced over
161% of our needs for the year.