The selling back to the grid paid off for us this month, and will carry over into next. Otherwise it's been saving us a lot of money each month sending extra back into the grid.
My latest Solar update with a $38 credit this month and carryover kWh for next month is here...
https://peakd.com/hive-127466/@ksteem/finally-free-power-solar-update
Woohoo!