Site power is under-used
Chargers are set in kW, the grid connection is rated in kVA. To stay safe, the site is capped at the lower of the two to avoid circuit-breaker tripping.
Increase charging power utilization and site uptime with evPower Edge Box
The Edge Box adds measurement and control at the point of supply - feeding AI-DLM with real-time data, and opening the site to behind-the-meter (BTM) assets and grid services.
DC fast-charging sites are frequently limited in power and struggle to optimize uptime, both magnified by AC/DC conversion and dynamics of high-power equipment.
Challenges
Higher peak power. More energy sold.
Real-time current and voltage measurement tunes the load management.
Conversion loss costs margin
Charger's power modules draw more on the AC side than they deliver on the DC side, and the gap widens as they continuously degrade.
Tighter load management. Alerts when performance degrades.
The conversion coefficient is measured per charger, continuously.
Power quality costs uptime
Grid instability and unmanaged load negatively impact the dynamics of high-power charging.
Faster recovery, failure root-cause analysis, real-time alerts.
Continuous power quality monitoring, correlated with charging activity.
Unmanaged load limits charging
Stores, car wash and other variable loads draw from the same grid input as the chargers.
More power for charging. Higher energy sales.
Adaptive load balancing (ALB) equalizes the resource continuously to safely maximize peak power.
How it connects
Asset connections
Read
Power meters · Inverters · PV charge controllers · environmental, parking and LPR sensors. 1 Hz acquisition, 1 ms log replay, 7-day edge buffering with backfill.
Control
Controlled by evPower's techno-economic model, tailored for each asset specification.
Observability
Live and historical view across sites and chargers. Alerts with configurable thresholds. Any charging session reconstructable to the millisecond.
Security
Traffic off site rides a VPN, on a private APN. Encrypted transport, role-based access control, and an audit trail on every change.
Fail-safe operation
Safely maintain power limits
- Sequential validation before every setpoint is issued
- Continuous peak control, sustained whether or not a session is running
Surviving faults
- Safe operation through communication loss (one charger or the whole site), power loss, and charger bugs or misconfiguration
- Dual Ethernet, dual power input, master-master high-availability controllers