I‘m not sure why people are often confused about this. Electricity is at a basic level a commodity. A kWh from solar isn‘t any different than 1 kWh obtained by burning coal.

If the current market situation allows for a price of 12ct/kWh, why should I - just because I have the more effective technology - get less than the fossil guy?

Generally this is even beneficial because it could increase margins for renewable and grid scale batteries