7.5 to 167Real household energy data from open research datasets
Same battery, different answer
years for the same 10 kWh battery to pay back, depending on the home
- What was observed
- Household electricity use and solar, home by home, with retail prices.
- What a generic approach says
- Quote one payback period for a battery.
- What the engine read
- The same 10 kWh battery paid back in 7.5 years for one home and 167 for another; for 20 homes without solar, the answer was do not buy.
- What it meant for the decision
- A decision about one household needs that household's own data. The same engine values price forecasts too: over one month of market prices, a forecast was worth 15% to 63% of perfect foresight to a battery, depending on the region, and in one region a fixed rule did better.