OPEX (Operating Expenditure) is the ongoing cost required to run and maintain a business, asset, or service. In EV charging, OPEX covers the recurring costs of operating charging sites and networks—separate from CAPEX (one-time investment costs such as hardware purchase and installation).
What OPEX includes in EV charging
Typical EV charging OPEX categories include:
– Electricity costs (energy per kWh, time-of-use tariffs, losses)
– Demand charges and capacity fees (where applicable)
– Maintenance and repairs (preventive maintenance, corrective service, spare parts)
– Field service logistics (truck rolls, labor, travel time)
– Software and CPMS fees (platform licenses, per-connector fees, updates)
– Connectivity costs (SIM/LTE plans, routers, VPN/private APN)
– Payment processing fees (PSP fees, chargebacks, terminal maintenance)
– Customer support (helpdesk, dispute handling, refunds)
– Site lease costs / rent / revenue sharing with hosts
– Insurance, compliance checks, and periodic inspections
– Cleaning, signage upkeep, and parking enforcement (destination sites)
Why OPEX matters
OPEX is often the biggest driver of long-term profitability and service quality:
– Determines gross margin per kWh and overall site profitability
– Impacts pricing strategy and competitiveness
– Drives uptime and customer satisfaction through maintenance capability
– Influences network expansion ROI and payback calculations
– Affects tender competitiveness where service SLAs and uptime are scored
Common OPEX KPIs for operators
– OPEX per charger per month
– Cost per completed session
– Maintenance cost per charger and MTTR trends
– Energy cost per kWh delivered (blended)
– Support tickets per 1,000 sessions and cost per ticket
– Payment failure rate and chargeback rate
– OPEX as a percentage of revenue per site
Ways to reduce OPEX without harming service
– Improve uptime with monitoring, preventive maintenance, and spare parts readiness
– Standardize hardware and site templates to reduce service complexity
– Use remote diagnostics to increase remote resolution rate and reduce truck rolls
– Optimize tariffs and use managed charging to reduce peak costs
– Negotiate connectivity and CPMS fees at scale
– Reduce vandalism risk with better placement, lighting, and durable IP/IK designs
Related glossary terms
CAPEX
Total cost of ownership (TCO)
Network expansion ROI
Uptime
Mean Time To Repair (MTTR)
Demand charges
Load management
Revenue sharing
CPMS
Maintenance cost reduction