INDICATIVE PROTOTYPE · figures pending NUMBERS v2.2 sign-off · internal — not for external release
enleashed
topology evidence all
Workstream 4Product
& interface
Scoping question

What does the Plane A backtester actually feel like to use — and can a cold visitor reach the £540/yr in two clicks?

Logic & data

Half-hourly price scenarios (Elexon-shaped) × a segment load profile; bill delta vs a standard variable tariff; supplier margin vs wholesale.

Interface

Controls → live chart → customer / supplier / fairness read-out → a session backtest ledger toward 60/week.

Live sandbox · product backtester (Plane A)

Test a tariff before you launch it.

A working slice of the engine. Set a product up, choose a price week, and run it against a synthetic cohort on real-shaped half-hourly prices — see who's better off, whether it pays for the supplier, and whether it's fair, in shadow mode. Run it as many times as you like; that's the point.

Design the product

Product
Price week Typical
Off-peak window 6 h
Off-peak rate 9 p/kWh
Smart-charging shift 70%
peak rate 35p · baseline: standard variable 30p flat
Customer benefit
£0
per year vs standard variable
Supplier margin
£0
per customer / year vs wholesale
Verdict
—
One representative day · price × customer load
price p/kWh load on SVT load shifted (smart)
What this does & doesn't say: the headline is an EV-tariff (or selected-segment) customer benefit — not a whole-population or average-household figure. Prices are Elexon-shaped scenarios on a synthetic cohort, in shadow mode; no real customer is enrolled and the grid is never touched.
Session backtest ledger · this is the throughput
Runs this session0 / 60 a week  · 
Every row is a backtested product configuration — what used to be 1–2 live trials a year becomes 60 a week, before a single customer is enrolled. Runs persist in this browser only. All outputs are indicative model results pending NUMBERS v2.2 sign-off; £540/yr is the EV-tariff customer proof point, 34% (system curtailment, published CSIRO/AU) is a separate Plane-B result, not produced here.