Swappable Battery Hybrid for Semis Promises 200-Mile Electric Boost

Revoy is marketing a detachable battery-and-motor module that sits between the tractor and trailer to deliver up to ~200 miles of electric assist for an 80,000-lb semi, aiming to improve fuel economy and cut emissions without full EV conversion. The system uses regen braking and can be swapped via a network of hubs; Revoy claims up to 85% emissions reduction and has NHTSA clearance with Ryder pilots, planning a Portland-area commercial route. The startup raised $27M and faces infrastructure, supply-chain, and regulatory hurdles, especially around imported components and California incentives for EV trucks.