Why is my utility meter spinning forward?

Utility Meter

If you see production on your Envoy or Enlighten and the meter is spinning forward, then you are consuming more power than your system is producing. Or, if the utility has not yet granted permission to operate, they may not yet have installed a bi-directional meter.

Without a bi-directional meter, production from the array will make the meter spin forward and your utility will actually bill you for production. For this reason (among others) it is important not to turn on your PV system  until you have permission to operate.