Have a high utility bill? How you can stay cool and save money this summer Danville city leaders ask residents to conserve, but not because of power outages Published: Tags: How to save money on energy over the summer DANVILLE, Va. – You might think a summer scorcher may be torture on your cooling costs, but Appalachian Power has suggestions to save on your bill. First, cover your windows during the day to block out the heat. “Keeping the blinds closed or the shade down during the day can save customers 10-25% percent on cooling costs,” said Teresa Hall, a spokesperson with Appalachian Power.