There are a few reasons why your electricity bill may still be higher in summer even with solar panels:
- Increased Energy Use - Summer often involves more AC use, appliances running, long days, etc. This can outpace solar output.
- Peak Rates - Some utilities charge higher peak rates in summer afternoons/evenings when solar production is declining but demand is still high.
- Overcast Weather - More cloudy, rainy days in summer can periodically reduce solar output.
- Roof Orientation - Panels facing east or west are less aligned with the summer sun's path than true south.
While solar panels can drastically reduce your summer electricity costs, some higher use and billing factors may remain. Careful load management, battery storage and checking your billing plan can help optimize summer savings. But seasonal fluctuation is to be expected.