10 September 2013, 00:05
What about using a battery to power a small inverter, then feeding the output of that inverter into the "mains in" on the grid tie inverter, to fool it that mains was present. Once running you could keep the small inverter battery charged from the grid tied inverter.
Obviously only of use in a grid down situation because you'd have to disconnect the "real" mains connection.
Obviously only of use in a grid down situation because you'd have to disconnect the "real" mains connection.