It's been a good year!

Ten Month ChartThis graph shows how well our PV system has done during an 11-month period in 1997. Our new Trace inverter, after an initial "burp" which required it to be shipped back to the manufacturer, has performed flawlessly since February. Starting in March, we began to have a net surplus. This meant that we sold to Central Maine Power (Out) more power than we bought (In). The net was purchased from us at 2.5 cents/kWhr. Our monthly electricity bill has been under $10 for each of those surplus months. Notice the August reading...many children and grandchildren here...the same in December. On balance (without January of '97) we had an annual surplus of electricity!