In the case of the U.S. electric vehicle charging network, lead cells would be charged with cheaper electricity outside peak hours, to reduce the cost of charging during the day for a service station and for the EV owner. In particular, lead-acid batteries could help prevent the service station from incurring “peak demand,” an additional charge that electric companies charge U.S. companies.

A February 2018 report by McKinsey consultancy “How Battery Storage Can Help Charge The Electric-Vehicle Market” suggests that a service station could save £2,400 a month on electricity costs alone by reducing the load on demand.

Demand charges can be so high for electric vehicle charging stations that theyre not profitable, says McKinsey. Consultants suggest that a fuel station owner could install two 150kWh DC fast chargers along with 300kwh lead cells. At peak times, lead cells would deliver the charge to customers electric vehicles and, through a smarter charger and battery management, could replenish several vehicles without triggering demand charging.

“A system configured in this way could minimize demand charges, which would be $3,000 per month and would not have to be passed on to consumers, thereby substantially reducing costs. Tesla has already said its going this way and others can follow the suite,” McKinsey said.

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