Charger Uptime

Outage records and uptime calculation for EV charging ports.

Charger Uptime is an offline iPhone and iPad app for the people who keep public EV charging ports running. You record outages as they happen, mark which minutes are excludable, and the app calculates a trailing twelve-month uptime percentage per port.

Not affiliated with any government agency. This app is not affiliated with, endorsed by, or connected to the Federal Highway Administration, the U.S. Department of Transportation, or any other agency. It performs the arithmetic published in 23 CFR § 680.116(b) on the records you enter. It does not interpret regulations and does not guarantee compliance. Verify all figures before submitting them.

How uptime is calculated

The app uses the equation published in 23 CFR § 680.116(b):

μ = ((525,600 − (T_outage − T_excluded)) ÷ 525,600) × 100

525,600 is the number of minutes in a year. T_outage is the total recorded outage minutes inside the trailing twelve months. T_excluded is the part of that time attributable to electric utility interruptions, vehicle faults, scheduled maintenance, vandalism, or natural disasters.

Because the regulation only allows those minutes to be excluded when the operator can demonstrate the port would otherwise have been operational, the app will not exclude an outage until you have added a note or an attachment to it.

Remaining allowance

Maintaining more than 97% uptime leaves 15,768 minutes of chargeable downtime in a year. The dashboard shows how much of that remains for each port, so you can see whether a port is heading for trouble before the year closes.

What the app does

Records outages with start and end times, cause, error code, corrective action, and evidence
Separates excludable minutes from chargeable minutes, with an evidence requirement
Shows a trailing twelve-month uptime percentage and monthly breakdown per port
Records annual electrical tests and ground fault verifications
Exports quarterly and annual PDF reports, plus CSV of the raw records
Keeps a revision history when you correct a finalized record

What the app does not do

It does not talk to chargers or any network. There is no OCPP, no telemetry, no automatic data collection.
It does not decide whether a requirement applies to you.
It does not submit anything to anyone.

Privacy

The app works entirely offline. No account is required and nothing is sent anywhere. See the privacy policy.

Support

Questions, bug reports, and feature requests: goonobu@gmail.com