Tariff strategy · 7 posts
The Switching Question
For a solar-and-battery household, "which plan is cheapest?" is the wrong question.
- Part 1 · 7 min read
The Curtailment Trap: Why My Own Bills Nearly Fooled Me
A summer of accurate bills was the wrong evidence for choosing a plan, because my own export curtailment had rewritten the generation record.
- Part 2 · 7 min read
Manufacturing Hindsight: Six Years of Weather, Sixteen Years of Sunshine, Five Years of Prices
Building a fairer test for plans from public weather, a long sunshine record and reconstructed prices, and the cooker circuit that the meter and the monitoring exposed between them.
- Part 3 · 7 min read
Every Electron Has a Cost Price
Three exported kilowatt-hours, three cost prices: straight off the roof, through the battery, or bought, stored and sold back.
- Part 4 · 7 min read
The 4.7-Cent Toll: Measuring What My Battery Charges Me
One deliberate charge-and-discharge test and a wear costing put a price on every kilowatt-hour my battery hands back.
- Part 5 · 7 min read
Passive Income, Operated Income: The Capture-Fraction Question
A simple free-window plan against an automated wholesale plan: the answer turns on how much of the theoretical value the household actually banks.
- Part 6 · 7 min read
Two Seasons, Two Businesses: The Plan I Made in June and What I Did in October
In June I planned to switch plans twice a year; in October I moved to one fixed-schedule plan, and here is what I decided on, what the next day's checks showed, and what the first week on the meter says.
- Part 7 · 7 min read
Free Hours, a Full Battery, and the Number 48
A 48 kWh battery is the most free energy a house can store, not the most it can use; what a free window is worth turns on the plan's cap, how the cap is measured, the battery's spare room and the house's own use.