Tesla is going to operate public Megacharger sites at three electric truck depots it doesn’t own. Forum Mobility, one of the largest heavy-duty charging operators in the US, says Tesla will run public Megacharging at three of four new California depots it’s about to break ground on.

The move comes as Forum brings another 30 MW of heavy-duty charging online and sits on reservations for more than 330 Tesla Semis. It’s the clearest sign yet that Tesla’s Semi charging network is getting built through partners, not just Tesla-owned stations.