A damn sight less than dino-juice going by the Kia page below!:
https://www.kia.com/ie/about-kia/experience-kia/technology/electrification/electric-car-charging-costs/
"Assuming the cost of electricity to be €0.17 per kWh, here's what it would cost to charge the batteries that are used in both the e-Niro and e-Soul, and also the cost per 100km driving for the e-Niro, fitted with these batteries, based on the WLTP average range figures.
The 64 kWh battery has an average range 455km, and the 39.2 kWh battery has an average range 289km
On the long range battery: 64kWh (64 X €0.17) = €10.88 to fully charge: €2.39 per 100km (€10.80 /455km *100km). For the mid range battery of: 39.2kWh (39.2 X €0.17) = €6.66 to fully charge: €2.30 per 100km (€6.66 / 289km *100km)"