Day-Ahead & Intraday Energy Markets

The Opportunity

EV charging is one of the most price-elastic loads on the European electricity grid. A charge session that starts at 22:00 instead of 20:00 can cost half as much depending on day-ahead market prices. At scale, a network of managed chargers is effectively a large, schedulable load that can be optimised against electricity market prices in real time. GreenFlux's Smart Charging API accepts external scheduling signals, making it straightforward for a market-optimisation layer to push charging schedules derived from price forecasts. Session and MeterValues APIs provide the consumption data needed for settlement and reconciliation. With the ACER Network Code on Demand Response submitted to the European Commission in 2025, EV charging load will increasingly be eligible to participate in balancing and imbalance markets.

Use Cases

• Shift fleet charging to low-cost, high-renewable periods — reducing energy costs and carbon footprint.
• Enable energy retailers to offer green tariffs scheduling sessions around renewable generation forecasts.
• Pre-position large overnight charging needs against next-day market prices, saving 20–40% vs unmanaged charging.

Example Integration

# Market optimiser pushes a low-price window schedule at 14:00 for the next day
POST /smartcharging/capacitygroups/cg-fleet-depot/scenarios/datetime
{
  "startDateTime": "2026-07-01T22:00:00Z",
  "endDateTime":   "2026-07-02T06:00:00Z",
  "maxCapacity": 120,
  "comment": "EPEX spot low-price window €28/MWh"
}

# During peak hours — restrict to minimum guaranteed fleet charge
POST /smartcharging/capacitygroups/cg-fleet-depot/scenarios/datetime
{
  "startDateTime": "2026-07-02T07:00:00Z",
  "endDateTime":   "2026-07-02T21:00:00Z",
  "maxCapacity": 20,
  "comment": "Peak period — balancing market participation"
}

# Pull meter values for settlement reconciliation
GET /metervalues?capacityGroupId=cg-fleet-depot&from=2026-07-01T22:00:00Z

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