Charge point operators collect large amounts of data from every session. The challenge is knowing which numbers matter. A small set of well-chosen KPIs, reviewed every month, tells you which sites are paying back, which are struggling, and why.
Operational KPIs
| KPI | What it tells you |
|---|---|
| Uptime | The share of time a charger is working and available. The foundation of every other number. |
| Session success rate | Started sessions that complete without error. Low rates point to hardware, software or vehicle compatibility issues. |
| Utilisation | Hours of charging per charger per day, as a share of the day. The main driver of revenue. |
| Energy per charger per day | kWh delivered. Useful for comparing sites with different charger sizes. |
| Average session length and idle time | How long vehicles charge, and how long they stay after. Long idle times block bays. |
| Time to repair | How quickly faults are fixed once reported. Shows the quality of your maintenance service. |
Financial KPIs
| KPI | What it tells you |
|---|---|
| Revenue per charger | Monthly income from each charger, including idle fees and subscriptions. |
| Gross margin per kWh | Price per kWh minus energy cost per kWh. Shows whether your pricing covers your energy tariff. |
| Cost per kWh delivered | All operating costs divided by energy sold. Reveals sites where fixed costs are too high. |
| Payback period | How long until a site's cumulative profit covers its investment. |
| Return on investment | Profit over the site's life compared with what it cost to build. |
Customer KPIs
- Repeat users: the share of sessions from returning drivers. A sign of trust in your network.
- New users per month: shows whether marketing, listings and roaming are working.
- Complaints and support calls per 1,000 sessions: an early warning of reliability or payment problems.
Start with uptime. A charger that is offline has zero utilisation, zero revenue and an unhappy driver. Fixing availability usually improves every other KPI at once.
Using KPIs well
- Compare like with like: benchmark highway hubs against each other, not against workplace chargers.
- Watch trends, not snapshots: a new site's figures matter less than whether they are rising month on month.
- Link numbers to actions: low session success leads to a hardware check; long idle time leads to an idle fee; low utilisation leads to better visibility or a fleet partner.
- Keep definitions consistent: agree how each KPI is calculated so reports can be compared over time.
How PxT can help
PxT Energies and EVee Buddy provide monitoring and reporting across every charger we install or operate, with uptime, utilisation and revenue reports for each site. We can also review an existing network's data and identify where returns can be improved.