Solar power is probably the single most familiar alternative power source available today. Once your system is in place the electricity is free. If you have a battery bank you can run 24/7. For emergency situations a solar generator can provide enough power to keep your food safe, run lights and fans, and keep you connected with the outside world. Small solar chargers are ideal to keep phones, tablets, and laptop computers charged. The larger the system you install, the longer you can survive without the grid. You can even provide all of your power with the energy from the sun and become energy independent.