Energy

What your energy costs, hour by hour, and when to use it.

The same work costs different amounts at different hours. Price every hour of a run, see when energy is cheap and when it is clean, and what your own roof takes off the bill.

A flat price hides the decision. Booked by the hour, energy shows what a price shock costs each good part, and what cheaper hours win back.A flat price per kilowatt hour hides the decision. A model that books energy by the hour, from the same clocks every other figure comes from, can tell you what a price shock does to the cost of a good part. And what moving work into cheaper hours wins back.

A price shock, a roof, and work moved into cheaper hours

The same work, cheaper by when it runs

On a contract with cheaper weeknights, the same shift by night makes the same parts from the same kilowatt hours. Only the bill changes.The same line, the same crew, the same eight hours a day, worked once by day and once by night, on a contract whose weeknights are cheaper. The parts come out the same, and so do the kilowatt hours. The bill does not: every kilowatt hour is priced at the hour it is drawn in, including what a machine draws while it waits.

The same shift by day and by night: the same parts, the same kilowatt hours, a smaller bill

Every hour priced as your contract says

A contract prices each hour: flat, a cheaper window, or market price plus margin. The same run can be priced under each contract you keep.A contract gives every hour of a run its price: one price all day, a cheaper window, or the market's price of the hour plus a margin, kept between a floor and a cap. Fees and taxes come on top of every kilowatt hour, and a demand charge on the month's highest hour. The same run can then be priced under each contract you keep. What would each have cost?

One run's hours priced under each contract you keep: what would each have cost?

Cheap and clean: mostly together, not always

Each hour gets its own grid CO₂. In January and February 2026 cheap and clean hours mostly coincided, but within a day they parted.Each hour's grid CO₂ is worked out from what Germany generated, source by source, in that hour, not from one factor for the year. In January and February 2026 the cheap hours and the clean ones mostly coincided: a windy hour tends to be both. Within the day they part. The night is cheapest, midday cleanest, and the early evening dearest and dirtiest at once.

Scope 2 takes the grid's figure for each hour first, and a contract's own label or mix only for an hour without one
A contract that promises a green share its mix does not reach is refused

Every hour of January and February 2026: cheap and clean mostly together, apart within the day. Data CC BY 4.0: Bundesnetzagentur | SMARD.de (prices), energy-charts.info (generation)

Your own roof and turbine

Output from your panels and turbines is worked out hourly from the site's weather. The line uses its own first and buys the rest.Declare solar panels and wind turbines with their size, tilt and hub height, and what they make is worked out hour by hour from the site's weather: measured for the past, forecast for the week ahead. Each hour the line takes its own energy first and buys the rest; a surplus is sold at your export price, or curtailed.

Every formula is an approximation, and the documentation names the source of each one
A scenario that adds a roof is scored by what it does to the costs and the CO₂

Weather in, energy out: each hour the line uses its own first and buys only the rest

Where the numbers come from

Energy-Charts for prices and generation, Open-Meteo for weather: public, fetched only when you ask, and kept with each run so it repeats exactly.Two public sources, neither needing a key: Energy-Charts (Fraunhofer ISE) for the exchange price set a day ahead and the generation the grid's CO₂ is worked out from, and Open-Meteo for the weather at your site. Nothing is fetched unless you ask, and without a network the product shows what it holds and how old it is. A run keeps the prices it was priced with, so it repeats exactly.

Prices and grid CO₂ for the bidding zone of Germany and Luxembourg today

Public sources, fetched only when you ask and kept with their age; each run keeps its own copy

The same model, next

The same kilowatt hours, read for footprint, for tomorrow's plan, or for the decision.

Simulation

Build a working model of your operation and run it as the real thing.

Planning

Strategy, investment cases and letting the software search for the best configuration.

Operations

Shifts, rosters, breaks and calendars, and the daily decisions they drive.

Analysis

Product passport, weighing the options, proposed actions and reports both audiences can read.

Sustainability

Emissions, energy, water and material, answered in the same run as cost.

What would a price shock do to your cost per part?

Bring your contract and a week of production. We will show you which hours your energy really costs you, and what moving work or adding a roof would change.

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