Get an inverter for your alternative home energy system
Standalone inverters convert DC power stored in batteries to AC power that can be used as needed. 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 you plan to run at one time.
Utility intertie inverters convert DC power from PV modules into AC power to be fed into the utility grid. Most grid-tie PV systems use the utility company, in effect, as a storage battery. When the sun is shining, your electricity comes from the PV array, via the inverter. If the PV array is generating more power than you are using, the excess is sold to the power company through your electric meter. When you need more power thn the PV array can supply, the utility makes up the difference.
Grid-tie Battery-backup Inverter
The third type of inverter can be used as a grid-tie battery-backup inverter or an off-grid inverter, either way, a battery bank is required for inverter operation.