What you'd save by shifting load to the cheapest hours
A dynamic tariff prices each hour at wholesale; a shiftable load — an EV, a heat pump, a home battery — that runs in the cheapest N hours per day beats a flat tariff. This calculator shows how much, per zone.
Perfect-foresight upper bound. Savings assume the load charges in the cheapest hours, known in advance — an upper bound, exactly like the Wattlas battery model. Real savings are lower.
A day, and its cheapest window
DE-LU average weekday, € / MWh by hour
Average hourly price
Cheapest — charging window
The calculator picks the cheapest N hours with hindsight (perfect foresight) — the honest upper bound. Real schedulers act on a day-ahead forecast and capture less. Hourly-resampled prices, local time (Europe/Berlin). Source: ENTSO-E.
Yearly saving by load and zone
€ saved vs a flat tariff
EV
Heat pump
Home battery
Flat-tariff baseline = the period mean price; savings scale with the daily spread and the load's shiftable energy. Upper bound under perfect foresight — real savings are lower. Source: ENTSO-E.
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