kWhen is a white-label widget you drop into your app. It shows each user the Belgian day-ahead price curve and tells them the cheapest moment to run the dishwasher, charge the car, or heat the boiler — in your branding.
Customers who consume in cheap hours are cheaper to serve — and an engaged, nudgeable base is a flexibility asset you can value toward the TSO.
Smart-charging advice without building a pricing pipeline: embed the widget, keep drivers charging when the grid is cheapest.
Show battery, heat-pump and solar customers exactly when shifting pays — and what your hardware earns them.
Paste the iframe, pass your brand and accent color, done. The widget auto-sizes, follows your user's light/dark preference, and speaks EN, NL and FR.
<iframe src="https://kwhen.eu/widget/?brand=YourCo&accent=2a78d6&lang=nl" style="border:0;width:100%;max-width:560px" title="Cheapest electricity today"></iframe> <script>addEventListener("message", (e) => { if (e.data?.type === "kwhen:height") document.querySelector("iframe[src*=kwhen]").style.height = e.data.height + "px"; });</script>
One iframe (or web component) in your app or portal. White-label: your name, your accent color, your language.
Clear "cheap now / wait until 13:00" guidance plus per-appliance savings turn price curves into actions.
Users cut their bill. You cut sourcing, imbalance and peak costs. The grid sheds its expensive peaks.
The widget runs in the user's browser. Consumption data never touches our servers — there is nothing to breach, nothing to audit, nothing for your DPO to lose sleep over.
Price data flows one way: from the market to the browser. Any personalisation (appliances, consumption CSVs) stays on the device.
Belgium's capacity tariff will bill households on their peak kW. The same widget that shifts load off price peaks shifts it off billing peaks.