A blackout stress test for your household
The power is gone.
How long do you last?
72 hours of winter blackout, your household, your decisions. Water, warmth, storage, neighbours – every choice has consequences. At the end you know where you really stand.
Runs entirely in your browser. No account, no data on a server. We only ask for contact details if you request a storage quote.
Choose a household
Apartment, family or a house with PV and storage. Three starting points, three very different nights.
Decide for 72 hours
Shed loads, set up a warm zone, stockpile water, help the neighbour – or don't. Time runs, events interrupt you.
Read the debriefing
A score across seven dimensions, your critical decisions on the timeline and your three biggest weaknesses – with concrete real-life missions.
Scenarios
Each scenario is a different opponent: cold, heat, storm, or a short outage to get started.
A Wednesday evening in January. The grid goes down, it is minus six outside, and nobody says how long it will last.
Friday afternoon in a heatwave. Without power the cooling stops, water gets scarce, and the flat barely cools down at night.
Sunday evening; an autumn storm has torn the grid apart across several lines. Four days without power, with rain, wind and damage to the house.
A Wednesday morning in spring, one day without power. The entry point: mild, manageable, with water still in the tap — and instructive all the same.
And if you had battery storage?
Eight facts about your home, and you see over time how long 10, 20 or 30 kWh carry the essential loads and the warm zone.