Charging cost (£) — home estimated at 3.5p/kWh, network is Tesla's actual billed amount
Home (est.)Supercharger / network (actual)
Home charging cost, off-peak only (22:00–06:00, 3.5p/kWh)
A "charge" sums all home kWh from sessions starting in that overnight window — a narrower view than the cost chart above, which covers all hours.
Overnight battery change (00:00–07:00)
Above the line = charge gained (it charged during that window). Below the line = charge lost. Nights the car stayed asleep the whole time have no reading to compare, so they're omitted.
Electricity spend vs. petrol equivalent, per period
Electricity (actual)Petrol equivalent
Petrol assumed at £1.60/litre, 35 mi/UK gallon, for the same miles driven that period.