Edison designs their bill to make it very hard to tell what you are paying per kwh, but I think I'm paying between $0.20 and $0.30 depending on time of day.
That table is pretty accurate. I'm a commercial account in Massachusetts and the price listed is within a penny of what I got paid last month for a kWh.
Yeah residential is capped at 20kw of production for net-metering. I have array rated at 14.5kw and it tracks that at peak pretty well. I hope to add more panels, but they will not be part of my net-metering and be there to charge the future batteries and inverters I want to add.