Inverters: Off-Grid

Off-grid, or standalone, inverters convert DC power that is stored in batteries to AC power.  The size of an inverter is measured by its maximum continuous output in watts.  This rating must be larger than the total wattage of all of the AC loads that will be used at one time.  Most AC loads can be determined from a tag or label on the appliance, usually located near where the power cord enters the device, or the user manual.  If washers, dryers, dishwashers, power tools, etc, that use induction motors, the system will have to be designed to handle these surges while the motors are starting.