Most solar systems are designed to provide you with a portion of the electricity needed, but won’t provide 100% of your needs. At night and on cloudy days, and possibly at other high-energy-use times, you’ll need more power than your PV system can produce. That means you’ll still be connected to your cooperative’s power lines. Because these systems are grid-connected, energy can flow both ways. Each utility—including your electric cooperative—sets appropriate policies and rates for connecting PV systems to their lines (the grid) and for possibly purchasing any excess energy your system might provide. As you begin to explore solar systems, be sure you ask cooperative experts about rate structures, interconnection, essential safety precautions, and any other connection-related details.