We just started to get shorter days here it would seem. So I think I will be in the same boat soon enough. I am guessing my November report will show this.
Ah nice, we have charged up the battery bank a few times using the grid. Mostly when a tropical storm is on the way, and its been cloudy a few days before.
If you can charge in the middle of the night, usually the power is cheaper.
I'm not expecting to generate all we need every day through the winter, but off peak power is a quarter of the price of peak, so I can charge then. If the sun does shine then we can export the excess. Off peak costs 9p and export pays 8p, so not much difference.