Power Window

Find the lowest-price hours for flexible electricity use in Spain.

Planner

Choose the load, get the best start time.

Watch it work

Pick a load. See the best window.

EV charging

Plan by car model and charging need.

Choose a car to estimate charging duration.
Demo smart charging

Test charger scheduling without real hardware.

Demo only. No real charger is controlled.
Cost mode

Estimate the bill impact, not only the market price.

Best window

Loading REE data...

Prices will appear after the REE response is parsed.

Connecting Checking availability Source pending
Grid pressure

Checking demand and mix...

We combine demand, renewable generation, and combined-cycle gas to explain why an hour may be cheap or expensive. It is a signal, not an exact market prediction.

Demand --
Renewables --
Combined cycle --
Nuclear --
Source pending
Recommended action

--

Start here for the strongest price signal in the selected duration.

-- score
Timing grade -- Relative to this day's prices
Load label
A B C D E F G
Estimated consumption class
Estimated cost -- Energy component only
Run now vs best -- Waiting can be compared once today's hourly data is loaded.
Tomorrow check -- Day-ahead data is checked when available.
Reminder No reminder set
Android Install as app Use Chrome on Android for the best install flow.
Hourly price signal

Lower bars are better moments to run flexible loads. Past hours are muted.

best window low-price hour expensive hour price in €/kWh
Ranked windows

Remaining starts for this load

Frequently asked questions

Hourly electricity prices, EV charging, and flexible loads in Spain

Power Window uses hourly PVPC data published by Red Electrica to help shift flexible electricity use such as EV charging, laundry, dishwashing, or cooling.

What is the best time to use electricity in Spain?

There is no single best hour every day. The app compares the selected day's hourly PVPC series and finds the cheapest window for the selected duration.

Can I use it for EV charging?

Yes. The EV planner estimates energy from battery size, current charge, target charge, and charger power, then finds the lowest-price hours for that session.

Is the estimated cost a full electricity bill?

No. It is an estimate for deciding when to shift flexible usage. Contracted power, meter rental, taxes, retailer margin, and other bill items can vary by contract and fiscal territory.

Electricity price guides

Plan the loads that can move most easily

Focused search pages connected back into the real tools.