What uptime SLA should a property owner demand from an EV charging operator?

The industry has converged on three tiers: 99% scheduled uptime, 97% scheduled uptime, and no-SLA. A 99% SLA permits roughly 7.2 hours of downtime per port per month and is standard for DCFC sites where every hour of outage costs $30 to $150 in lost revenue. A 97% SLA permits roughly 22 hours per port per month and is typical for Level 2 destination charging where outages are less revenue-critical. No-SLA — where the operator commits to best-effort uptime with no contractual penalty — is appropriate only for amenity charging that does not have a revenue line. We recommend 99% SLA for any DCFC site, 97% for Level 2 paid charging, and we never recommend signing a no-SLA contract for a revenue-generating site.

What is ChargerHelp and why does it matter for parking operators?

ChargerHelp is the largest third-party EV charger maintenance dispatch network in North America, founded in 2020 to address the chronic uptime problem at first-generation public charging sites. Their business is field-service dispatch: when a charger fails, the operator opens a ticket through the ChargerHelp platform, a qualified technician is dispatched within a contracted response window, and the charger is restored to service. ChargerHelp pricing is roughly $80 to $140 per dispatch plus parts, with monthly retainer programs that reduce per-dispatch cost in exchange for committed volume. For a parking operator running EV charging as a managed-service revenue stream, ChargerHelp or a similar dispatch capability is essentially mandatory. Building an in-house EV maintenance team for a portfolio under 50 sites is rarely cost-justified. We integrate ChargerHelp into our Wins Parking operations stack at every Wins-operated DCFC site.

How much does EV charger downtime actually cost per stall per day?

Real-world downtime cost varies by stall type and utilization. A high-utilization DCFC port at a popular Mountain West destination generates $90 to $180 in gross revenue per day and $54 to $108 in net revenue after energy, demand, and platform fees. One day of downtime at that stall costs the operator the full net contribution — call it $80 per day at the average. A Level 2 destination port generates $8 to $24 in net revenue per day, so a downtime day costs $15. Idle-fee revenue is often $30 to $60 per stall per day at busy DCFC sites and is also lost during downtime. The math drives the SLA negotiation: at $80 in lost revenue per port per day of downtime, the difference between a 99% SLA and a 97% SLA is worth roughly $35 per port per month — easily enough to justify the SLA premium on the contract.

Should EV charging pricing be session-based or energy-based?

Energy-based pricing — dollars per kilowatt-hour — is the industry default for DC fast charging and is required by most state weights-and-measures regulators effective 2025 and 2026 for any commercial DCFC stall. Session-based pricing (a flat fee per session) is illegal in California, Washington, Oregon, Colorado, and several other states as of the 2025 regulatory cycle because it disadvantages drivers of vehicles with smaller batteries or slower onboard chargers. Energy-based pricing is also fairer to the operator because it tracks actual energy delivered rather than session duration. The right pricing model is energy-based per-kWh, supplemented by an idle fee that activates 10 minutes after the session ends if the vehicle remains plugged in. Time-of-use modulation — different per-kWh rates during peak demand hours — adds another 8 to 18 percent of revenue at most sites and is fully supported by every major network operator.

What dashboard KPIs should an EV charger site owner track?

Five KPIs cover 95% of operational decisions: scheduled uptime by port (target 99% DCFC, 97% L2), gross revenue per port per day, idle-fee capture rate (target above 35% of sessions that exceed the idle threshold), demand-charge ratio (peak kW billed divided by gross revenue, target below 22%), and average dwell time per session (target 28 minutes for DCFC, 90 minutes for L2 destination). Our owner dashboard pushes these five KPIs to the front page with traffic-light coloring against the target thresholds, and surfaces the underlying detail on click. We also track NPS via post-session survey, PlugShare and Google review scores by site, and weekly trend on each KPI versus the trailing 4-week baseline.

EV Charger Uptime SLA & Revenue Management

The operating decisions that determine whether your EV charging asset earns 60% of its installed-capacity revenue or 92%. SLA contract language, dispatch economics, dynamic kWh pricing, idle fees, and the KPIs every owner dashboard should surface.

The SLA Tier That Protects Your Revenue

The industry has converged on three uptime tiers: 99% (about 7.2 hours of downtime per port per month, standard for DCFC), 97% (about 22 hours, typical for Level 2), and no-SLA. We recommend 99% for any DCFC site and 97% for paid Level 2, and never recommend a no-SLA contract for a revenue-generating site.

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Downtime Economics and Dispatch

A high-utilization DCFC port nets $54 to $108 per day, so a downtime day costs roughly $80 in lost contribution plus $30 to $60 in idle-fee revenue. Third-party dispatch through ChargerHelp runs $80 to $140 per dispatch — essentially mandatory for any portfolio under 50 sites where an in-house maintenance team is not cost-justified.

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Pricing, Idle Fees, and the Five KPIs

Energy-based per-kWh pricing is now required by most state regulators; session-based pricing is illegal in California, Colorado, and several other states. Layer a 10-minute idle fee and time-of-use modulation for another 8 to 18 percent of revenue. Five KPIs — uptime, revenue per port, idle-fee capture, demand-charge ratio, and dwell time — cover 95 percent of operating decisions.

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