This is our 2.8KW PV array installed by EOS Energy. It looks like it will generate about 1/4 of our power in the winter (we have forced air heat which requires electricity). In the spring and Fall, we expect a near-zero bill (if we are really careful about our consumption). Our inverter tells us how much power we generate each day and how much CO2 we have saved since the system was installed. Next post will cover the various rebates that we will be receiving.
Saturday, January 23, 2010
We received our electric, gas and water bills this month and I am proud to say that paying attention to energy usage is paying off. I've been collecting data from our bills all last year when we lived without much focus on being efficient.
Last December, we used 1094 KWH and this December we used 861 KWH. That's a 22% savings over last year. Our house uses forced air heat with a pretty inefficient furnace (we'll upgrade that when we can). Our gas use—minus cooking and hot water—went from 237cf to 203cf—a 14% savings—mostly due to careful use of both the thermostat and the pellet stove. We used about ten bags of pellets at $4.50 per bag, so we saved a little bit of money there.
Electric prices in the Philaelphia area are expected to rise about 20% next year so these savings will become more important. The PV panels were activated in January - so stay tuned. Our water bills, thanks to energy star washer and dishwasher and a dual flush toilet is consistently about half or less of the national average which saves us about 600 dollars per year. One day we'll have a large rain water cistern to bring that number down further. Stay tuned for pictures of the 2.8 KW array!