Battery Swap Uses Fewer Batteries Than You Think

This story is about heavy electric trucks, not home equipment, but it is a useful look at where battery technology is headed. An Australian company called Janus Electric converts diesel semi trucks to run on electric power and swaps out their batteries at stations rather than plugging in to charge. The company's CEO said these swap operations need only about 30% more batteries than the trucks themselves carry, far less than many assumed.

A writer for the site breaks down why the overhead stays low. By timing truck departures so vehicles are spaced evenly along a route, and by having several trucks "in flight" at once between swap stations, operators can keep one spare battery charging while a small number of trucks use the road. This scheduling approach, which he calls route stuffing, also helps smooth out how much power the stations draw from the grid, and lets stations use smaller battery packs if they are placed closer together along a route.

For homeowners, there is no direct action here. Battery swapping serves heavy freight corridors, such as mine-to-port routes, where trucks run constantly and on a predictable schedule. It does not apply to home batteries, electric vehicle charging at home, or household energy upgrades. The piece is simply a window into how companies are working out the logistics and battery economics of electrifying heavy transport.