Solar panels cannot generate power at night or on cloudy days, so you need an alternative energy source. Battery-backed "grid-independent systems" store excess energy produced during the day for use when the sun is not producing enough power; but choosing this option will add significant cost and maintenance to your system.
Most people opt for grid-connected systems for reduced cost and maintenance and high reliability. With this type of system, your cooperative continues to provide energy to you when you need it 24-7. Your solar panel system will produce energy, and maybe even excess energy, on sunny days. But at night and on cloudy days, you will continue to draw electricity from your cooperative. Learn more about home solar power.
