![](https://www.fingridlehti.fi/wp-content/uploads/2020/02/polttokenno_otsikkokuva.jpg)
Main grid
Fuel cells secure critical functions in substations
Fingrid is working with Leppäkosken Sähkö to test a fuel cell solution that can charge the substation’s batteries, thereby safeguarding its critical functions in the event of a disturbance. Fuel cells generate energy from a mixture of water and methanol.