The electric bill for May went up compared to April with the higher temperatures and with charging the Volt, but we also saved more than in previous months.
The total bill was about $87. Without the solar panels it would have been about $262, so we saved about $175!
The Volt costs between $1.00 and $1.20 to charge each day, depending on how much I drive, so that added between $30 and $40 to the total bill; about the same as 10 gallons of gas.