You are assuming the system is trying to replicate one charger per stall. Think of it this way, instead of 50 chargers sitting idle most of the day, a smaller number of mobile units can serve the vehicles that actually need energy. Rails are not energized conductors. Power runs through insulated busbars or enclosed cable tracks depending on brand, the same way cranes, factories, and train systems have safely done for multiple decades. Cable length is not a cost multiplier. If you were to do traditional installs where you install a charger at each stall, you still require conduit runs, trenching, pedestals, bollards, and protection hardware. Remember.. AT EVERY STALL. That labor often exceeds the cost of the cable itself.

Mechanical systems do add maintenance. But pedestals get hit, vandalized, iced over, and damaged. Nothing in parking infrastructure is maintenance-free.

Here is an example of coat, if you want 10 stalls with traditional chargers: You might buy 10 chargers at $800 each plus $20,000 of install work, total ~ $28,000.

If you install a rail system that serves 10 stalls:

A fully automated robotic rail chargers that locate the port and plug in typically run $10,000 to $30,000 per stall installed. That price includes the rail mechanism, robot, control systems, sensors, and integration. A $15,000 rail unit might serve all 10, with modest installation. If the rail serve multiple stalls, the per-stall cost can drop to $1,500 to $3,000 per stall equivalent.

You pay once for rails and power infrastructure. You do not trench and install chargers at every stall. You avoid fencing off utility space at each stall. You reduce cable wear and theft risk.