Our 5kW solar array has been a big success so far. Installed in November of 2009 and started in January of 2010, we’ve seen a marked decrease in our electricity use. We’ve only been below SunRun estimates twice (graph below) – March and June, both by marginal levels. Most months have been a bit above the estimate, with April and May way above by nearly 100kW each.
In addition, we’ve seen significant reductions in our electricity bill (below). We went from consistently above the average to consistently lower than our most efficient neighbors. The only blip was October, when my wife rediscovered her joy of baking in our electric oven. The report is generated by the very cool Energy Insider that National Grid shows to customers.