Today there are over 1 Million solar systems installed across the United States. 400,000 of those are SolarCity customers. Someone new signs up for clean, more affordable energy with us every 3 minutes! SolarCity can install a solar system on your home for free and sell you the energy it produces for 30 to 50% less than you currently pay. 20 Year Agreement (Purchase, Loan, PPA, or Lease) with all repairs covered at no added cost to you!