elyob
The Month the Grid Paid Me to Fill the Battery
April 2026: 142 negative half-hours, 223 kWh imported at 3.91p — the most electricity I bought all year, and the least I paid for it.
agile
Should I Trust My Price Forecast? I Measured It
As a price oracle: ~41% trustworthy. As a slot-picking map: 97.4% of perfect. My planner only uses it as the second thing — measured over 26,552 predictions.
So, Am I Winning?
One-word answer, then the evidence: a 43% cheaper July in an 11% dearer market, a battery filling at 6.5p, and a paper trail that proves it.
Price Capture: the One Number That Judges My Charge Planner
A dearer market, a cheaper bill. One number — achieved price minus market average — isolates the charge planner's skill from weather, solar and luck.