Storing Energy

Keep the Lights On

Power an island city. Every choice has a cost.

Balanced making 0 MW
needs 0 MW
Forecast for the test week
15:00
Presets

Test week: do the lights stay on?

Think about it
  1. Tap each station. Which forms of energy are also stores of energy?
  2. At 7 pm on a calm day, where does the city's power come from? Which way do the dots flow when the battery charges?
  3. Compare two days in Results. Which trade-off matters most to you, and who would disagree?
  4. Pick a disaster. Which mix copes best in the resilience check, and why do mixes with many different sources usually do better?
For teachers
45 min · pairs
  1. Explore 10 min: tap presets, switch the map lens.
  2. Test week 5 min: who survives dark, still days?
  3. Disasters 10 min: pick one, see what breaks.
  4. Run a day 10 min: choose a goal, press play.
  5. Results 10 min: compare the mixes.
Big idea

No energy mix is perfect. Every choice trades off cost, CO₂, reliability, and land and materials.

Look for
  • Blackouts after sunset
  • Smog from coal
  • Batteries running empty
  • “Eco ideal” failing on dark, still days
  • Red warnings when disasters hit
Ask

Which mix would you choose for Japan? What would you give up?

Good to know
  • Numbers are simplified but point the right way.
  • Real facts and sources are in Fact files and the disaster cards.
  • War and cyber attack are kept simple. Preview them first.
  • Nothing is saved after a refresh.
  • Projecting? Press F or the full-screen button on the map.