Solar Electricity Practical Guide : (the principles of solar electricity, solar power and wind power, grid tied solar electric systems, how to measure electricity, the relationship between volts amps watts watt hours, components of a solar electric system, solar panels, batteries, controller, inverter, electrical devices, connecting everything together, a grid-tie system using a single central inverter, the design process, short cutting the design work, producing a power analysis, calculating inefficiencies) .