1. Go into the "ADVANCED SETTINGS" section of the inverter's menu,
  2. Enter the password 0010 (down down up down),
  3. Arrow down to "GRID ON/OFF" Turn the grid to OFF,
  4. Go back to the "ADVANCED SETTINGS" Menu,
  5. Go down the menu to "Power Control" and hit enter,
  6. Use the arrows to select "Set Output Power", 
  7. Select the "percentage" of output power you want the inverter to produce, 
  8. Hit Enter and turn the "GRID ON/OFF" back to ON
  9. Do a DC power cycle on the inverter and you are finished!