Utilization reporting is the regular measurement and presentation of how much EV charging infrastructure is being used—at connector, charger, site, and network level—using standardized KPIs and time periods. It turns raw session and meter data into actionable reports for operations, finance, site hosts, and planning teams, supporting decisions on expansion, pricing, reliability, and service performance.
What Is Utilization Reporting?
Utilization reporting typically summarizes:
– How often chargers are in use (time-based utilization)
– How much energy they deliver (kWh throughput)
– How many sessions occur (session volume)
– When demand peaks and where congestion appears
– How downtime affects effective capacity (availability-adjusted utilization)
Reports may be delivered as dashboards (near real-time) or as scheduled weekly/monthly packs for stakeholders.
Why Utilization Reporting Matters
Utilization is a core performance signal, but only if it is reported consistently and interpreted correctly. Strong utilization reporting supports:
– Expansion planning (where to add connectors next)
– Operational prioritization (which sites need maintenance most urgently)
– Revenue and margin tracking (utilization linked to billing outcomes)
– SLA governance for O&M providers (uptime and response performance)
– Site host reporting (amenity value, tenant usage, compliance evidence)
– Policy and enforcement decisions (blocking, bay misuse, idle time)
Common Utilization KPIs in Reports
– Charging utilization (%) = time actively charging ÷ total time
– Occupancy utilization (%) = time occupied (plugged/blocked) ÷ total time
– Availability (%) / uptime = time operational ÷ total time
– Availability-adjusted utilization = charging time ÷ operational time
– kWh per connector per day/month (energy throughput)
– Sessions per connector per day/month
– Average session duration and kWh/session
– Peak-hour utilization and congestion indicators
– Idle time share (occupied but not charging)
Best practice is to report both charging-time utilization and occupancy utilization, because they answer different questions (grid sizing vs user experience).
Typical Report Views and Breakdowns
Utilization reports usually include breakdowns by:
– Site, region, city, or portfolio segment
– Charger type (AC vs DC), power level, and connector type
– Time: hour-of-day, day-of-week, month, season
– User segment: direct customers vs roaming, fleet vs public (if available)
– Pricing period or tariff (to link utilization to commercial outcomes)
How Utilization Reporting Is Produced
A typical reporting pipeline includes:
– Session lifecycle and status data from chargers via OCPP
– Meter values (kWh) from chargers or certified meters
– Roaming CDRs via OCPI (for roaming utilization and settlement views)
– Downtime/fault states from monitoring and maintenance systems
– Data cleansing: time zone normalization, clock drift checks, duplicate session handling
– Calculation rules: clear definitions for “occupied,” “charging,” “available,” “offline”
– Aggregation and visualization (dashboards, CSV exports, monthly PDF packs)
Key Reporting Design Principles
– Define utilization clearly and keep it consistent across all reports
– Always show uptime alongside utilization (otherwise performance is misleading)
– Use connector-level reporting (ports are the true capacity unit)
– Separate planned maintenance vs unplanned downtime
– Highlight exceptions: top/bottom sites, rapid changes, recurring faults
– Pair utilization with outcome metrics: session success rate, idle fees, user satisfaction
Common Pitfalls
– Reporting utilization without stating whether it’s charging time or occupancy time
– Ignoring downtime (or treating offline time as “unused,” distorting comparisons)
– Mixing AC and DC sites without context (dwell time and turnover differ)
– Not normalizing for access hours (24/7 vs business-hours sites)
– Overlooking bay blocking and idle occupancy, which inflates “usage” without delivering kWh
– Treating utilization as a KPI without defining an expansion trigger (queues, unmet demand)
Related Glossary Terms
Utilization analytics
Utilization rate
Usage analytics
Network performance KPIs
Uptime
Charging Data Record (CDR)
OCPP
OCPI
Idle fees
Queue management