Answer guide · English

By Symbioen · Published · Reviewed

How should investors evaluate a charge point operator?

Evaluate a charge point operator (CPO) from the individual charging point up, not from the portfolio average down. An average can look healthy while a group of weak stations sits underneath it. Start with public status history, because neither buyer nor seller controls it, then compare it with the operator’s own records where you have them.

Decision
Investment, lending and portfolio oversight
Base unit
EVSE (individual charging point)
Evidence levels
Public, operator, fleet or vehicle
Boundary
Operational review, not an investment recommendation

Five checks for operator due diligence

1. Reliability over time
Is performance stable or getting worse?
Weekly trend, with the method version and coverage shown
2. Spread
Does the average hide weak stations?
Results per charging point and per station, not only one portfolio score
3. Charging outcomes
Do chargers show real charging use?
Successful charging sessions, checked against operator records where available
4. Failure and recovery
How often does service fail, and how fast is it fixed?
Failure episodes, repair time and stations with repeated problems
5. Evidence coverage
How much of the portfolio can be measured?
Scored, unscored and no-data stations reported separately

Look at the spread, not only the average

Two portfolios can both score 90 on average. In the first, most stations sit between 85 and 95. In the second, most score above 95 while one station in ten sits below 70. The second portfolio carries more repair work and more SLA risk, even though the averages match.

Break results down by charging point, station, region and network. Look first at the weakest sites and the busiest ones. A site that is on both lists deserves the closest look.

Warning signs

One weak week proves little. Look for problems that repeat across several weeks, especially at busy or strategic sites.

Repeat problems are also where the cost sits. In ChargerHelp’s 2026 study of US chargers, faults fixed in one visit took a median of 7 days to recover; faults that needed more visits took 32.

  • A high portfolio score with a long tail of weak stations.
  • Repeated failures with no sign of recovery.
  • Reliability falling while the network grows.
  • Large parts of the portfolio with no usable data.
  • Operator-reported figures whose scope or method cannot be checked.

Keep evidence sources separate

Public status history gives a baseline that neither side controls. The operator’s session and maintenance records add detail underneath it. Fleet or vehicle data, shared with consent, shows what drivers experienced.

A useful review states where these sources agree, where they differ and where there is no data at all. Report missing data as missing. Do not count it as success or as failure.

Operational evidence, not a valuation

Public status data tests assumptions about service quality, maintenance exposure and SLA risk. It does not show energy delivered or revenue.

Energy delivered per session comes from the operator’s session logs, which we can add under an agreed verification scope. We can also estimate what downtime and failed sessions cost per charging point; the lost revenue calculator gives you a quick version to try yourself.

Tariffs, costs and the valuation itself belong to commercial and financial diligence. Nothing in this guide is an investment recommendation.

Evidence and method

Sources for this guide