| Storage tank provider | Polar Night Energy |
| Client name | Utility Vatajankoski, Finland |
| Name of storage | Sand Battery |
| Type of storage / storage material | Builder’s sand |
| Operation mode of storage | Power-to-heat |
| Maximum storage capacity | 8 MWh |
| Which application is the stored heat used for? | District heating energy |
| Heat transfer medium | Air for charging and discharging |
| Range of temperature for operating storage | 150 °C to 400 |
| Date of commissioning | July 2022 |
