The U.S. added thousands of new public fast-charging ports in the second quarter, but the rate of growth slowed.

The all-time market share of Tesla Superchargers fell below 50% for the very first time.

Utilization rates remained steady, as drivers continue to absorb newly added capacity.

The buildout of America's public fast-charging stations slowed in the second quarter as charging networks shifted their focus toward profitability and improving reliability for EV drivers, charging data platform Paren said on Tuesday.

Charging companies added 4,382 new ports across 806 new stations in Q2, down from the 4,865 ports and 891 stations added during the same period last year. That's a 10% year-over-year decline. The numbers also fall well short of the fourth quarter's record, when operators added 5,966 new ports and 937 new stations.