Uptime refers to how much time a charger is active and operational for. A charger with 97% uptime is online and usable 97% of the time. To achieve such high uptimes, good hardware is required and CPOs need to be proactive in their maintenance and servicing. When drivers report faults that helps too - it's a community!

Uptime is an important metric to evaluate a network by, but its important to also allow time for that proactive maintenance.