Grid may not take concentrated EV Cars charging

High concentration of EVs can lead to equipment trouble later.
heavy demand was more concerning. The researcher simulated “a residential distribution transformer connected to six households” with 11 vehicles total. The transformer could handle up to six electric cars charging with Level 1 charging, but the simulated transformer saw demand in excess of its nominal capacity as soon as one EV with Level 2 charging was added to the neighborhood.

While electrical transformers are built to withstand such temporary surges in electrical demand, Muratori cites research that shows the expected life of transformer equipment can decrease “by two orders of magnitude when a transformer hits ’50 percent above its nominal capacity.'” While you wouldn’t necessarily have a blown-fuse scenario, the research shows that utilities may soon face a choice of either upgrading the equipment or having to replace existing hardware more often.