You can find electric car charging stations from Helsinki Airport’s parking halls P1 Premium, P2, P3 and P5. P1 Premium has nearly 100 charging posts and P2 has 145 charging posts on levels 1, 2 and 3. The P3 parking hall has 32 charging posts located on level 1 the area between buildings A and B. The P5 garage has 62 charging posts located on the entrance level -1. Type 2 charging cable is compatible with the charging stations.
You can read more about parking from Finavia's website.