GreenHour

The greenest hour in the next 48 hours to run your dishwasher, laundry or EV charge — and a verifiable ledger of the CO2 you've avoided.

Live data: National Grid ESO Carbon Intensity API · free · no key · government-published · GB pilot, method ports to any grid

Estimate, not a precise claim: the API reports average grid intensity, not marginal, so the real emissions avoided by one extra load will differ. Savings are measured against a named baseline — your usual run time (editable below).

Using national grid average

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Next 48 hours · carbon intensity

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Show the working — every data point a judge can open

Avoided-CO2 ledger

0 runs logged · stored locally in your browser

Total avoided 0 g