You may be overproducing energy during the day, when your solar panels are producing the most power, and then using more energy than you produced at night, when your solar panels aren't producing power.You also need to account for electrical losses that occur in the wiring and on appliances. For example, a 60-watt light bulb uses about 63 watts of electricity. So if you have a lot of lights or other appliances running at once, your electric bill can quickly add up.To reduce your electric bill, you can use a programmable thermostat to lower the temperature at night or when you're not home.

The amount of electricity generated by solar panels varies with the sunlight available. So even if your solar panel is generating enough electricity to power your home, your electric bill may still be high if you use a lot of electricity. Use less electricity and your electric bill will go down!