Do you have a pool? You could save a lot by investing in solar panels. There are small solar energy systems designed to power a water heater or a water pump and since you only use your pool during the warmer months, your panels will work perfectly when you need them.
See how to test your solar panel for open voltage and current reading. Results will vary depending on sun strength, time of day, angle of light and temperature.
Keep your solar panels out of the shade. It might seem obvious, but your solar panels do need sun. Make sure that you are not installing them in the shade. Trim back the branches on surrounding trees if you need to. Failing to do so could cost you more than half your energy output.