Smart tariff scheduling is a charging control approach that automatically schedules and adjusts EV charging to take advantage of electricity tariff rules—such as time-of-use (TOU) rates, dynamic pricing, or demand-based pricing—while still meeting user needs (e.g., ready-by times). It is a tariff-aware form of smart scheduling within smart charging and is used to reduce energy cost and avoid peak-rate periods.
Smart tariff scheduling can apply to individual home chargers, workplaces, multi-tenant sites, and fleet depots.
Why Smart Tariff Scheduling Matters in EV Charging
Electricity costs can vary significantly by time of day and season, and unmanaged charging often happens during peaks.
– Lowers operating cost by shifting charging into cheaper time windows
– Reduces peak demand exposure where tariffs penalize high kW peaks
– Improves site stability by avoiding synchronized charging during expensive peak periods
– Supports fleet economics by reducing €/km energy costs
– Can align charging with lower-carbon grid periods if tariffs correlate with renewable availability
For large sites, tariff-aware control can deliver substantial savings without changing hardware.
How Smart Tariff Scheduling Works
Smart tariff scheduling combines tariff data with charging objectives and site constraints.
– Tariff schedule is ingested (fixed TOU table or near-real-time price feed)
– Charging requirements are defined (target SOC/kWh, departure time, minimum SOC)
– Site constraints are applied (site power limit, feeder limits, charger ratings)
– The controller chooses charging windows and power levels to minimize cost
– Charging is executed using power profiles (start/stop, current limits, throttling)
– Adjustments are made if conditions change (late plug-in, site load spikes, price changes)
Execution can be done by a home energy system, an EMS, or a CSMS using OCPP charging profiles.
Common Tariff-Aware Strategies
– Off-peak scheduling: charge only during low-rate hours
– Cheapest-hours optimization: charge during the lowest-priced hours within a deadline window
– Peak avoidance: reduce charging during peak-rate blocks even if plugged in
– Demand cap control: keep total site demand under a threshold to avoid demand penalties
– Hybrid fleet strategy: ensure minimum readiness first, then optimize remaining energy for cost
– PV + tariff coordination: charge from PV when available and from grid when cheap
Where Smart Tariff Scheduling Is Used
– Home charging with TOU tariffs
– Workplaces managing daytime demand peaks
– Apartment and multi-tenant charging with shared site limits
– Fleet depots with shift-based charging and overnight tariff windows
– Sites participating in dynamic pricing or flexibility programs
– Locations with volatile energy costs or contracted capacity constraints
Key Benefits of Smart Tariff Scheduling
– Lower total energy cost and improved charging ROI
– Reduced peak demand and improved grid compatibility
– More predictable energy spend for fleets and site hosts
– Better utilization of existing site capacity through optimized timing
– Supports sustainability goals when paired with renewable-aware scheduling
Limitations to Consider
– Savings depend on tariff spread and the flexibility of vehicle dwell times
– Requires accurate time, tariff data, and correct timezone configuration
– May reduce charging speed during peak periods, affecting user expectations
– Dynamic tariffs require reliable price feeds and system resilience
– Multi-vendor interoperability can limit control granularity across chargers
Related Glossary Terms
Time-of-use (TOU) tariffs
Off-peak charging
Smart scheduling
Scheduled charging
Smart charging
Managed charging
Peak demand profiling
Peak shaving
Site power limit
Fleet energy management