Yes, Germany has plenty of coal reserves. Germany has about as much subbituminous coal & lignite reserves as U.S. https://en.wikipedia.org/wiki/Coal_reserves (But neither should Germany, U.S., China, India or any other country burn fossil fuels if possible).

The levelized cost of electricity (LCOE) are pure generation costs, you take total cost of generation (building power plant, operating costs, fuel, decommissioning) over expected life time and divide it total produced energy produced over expected life time. You don't take into account electric network as physical and economical system. For example you disregard transmission, demand for electricity, costs of stabilization of the energy grid, costs of backup - dunkelflaute.

https://en.wikipedia.org/wiki/LCOE

The main problem of German electrification (and in general the whole Europe) are too high prices of electricity.

The problem of too high CO2 emissions are too low CO2 prices (zero in U.S., low in China).

https://en.wikipedia.org/wiki/Supply_and_demand

> Yes, Germany has plenty of coal reserves.

I don't care, I was talking about power stations. Look at charts linked in previous comment.

> For example you disregard transmission, demand for electricity, costs of stabilization of the energy grid, costs of backup - dunkelflaute.

I literally said the word "dunkelflaute" on the first line; and I have absolutely accounted for that, that's why I said what I said about batteries, and why even with those renewables are cheaper.

Transmission and demand are approximately identical for all power sources, modulo only where the specific power lines go. Well, that and that in principle one can be off-grid for PV+batteries at a reasonable cost (especially for new builds given how much a grid connection costs in the first place), which is itself rather novel, but IMO will only be worth accounting for when almost all vehicles are EVs and/or literally all new houses come with PV and it's no longer optional (last I checked this was not yet the case).