Our monthly average kWh use since May 2006 is 1183. We are moving ever closer to a long-term average of <1000. This month's actual use was 805 kWh. I've been purposefully not turning on the heat. And it is not just to save energy. I think that running the heat in the spring raises the ambient temperature house's huge thermal mass, which makes summer cooling more difficult. Mashi and I sort of have a bet over this hypothesis, a huge bet, for millions of rightness points. In other words, I think that having a chilly house in spring will mean we need less A/C in the summer. He thinks it won't make any difference. The suspense! The drama!

This chart is from the May 2006 - present earthship power usage history spreadsheet. You can also read our energy audit that explains the power fluctuations over a 12 month period (2006-2007).