Visited today without charging.
The parking is freely accessible and seems to be free. There's a sign explaining how to park in the gravel and each spot is given a number, but I didn't find any parking meter and there was no blue disc nor parking meter icon on the P signs.
The layout sign probably pre-dates the charging station as the 2 charging spots are not marked any differently. Also the charger is offset quite far back from the partial white lines that exist on the part that is covered by asphalt. This has the interesting benefit of creating very long charging spots, so you could charge a van here without sticking out.