I just checked some prices for small scale PV farms you can plant to your house. It's 16,83 euro-cent for the PV per KWH and 23,74 euro-cent for the storage. Production is 10KWH, storage is 11KWH.

So if we (naively) multiply by 1000 we get 23,74€/MWh. And that is for the home market. I know battery storage doesn't scale linearly, but also if you were to build this as a highly-scaled farm, I'm sure prices would also drop as well.