What it is. What the carmaker billed for each kWh it sent to the car, taken from the invoice. It is the price on the invoice, not the car’s estimate, and it is before any energy is lost on the way to the battery.

Why it moves. Some chargers bill a lower rate off-peak. The owner’s rate card, below, covers the two he uses most. A charger can change its price. A week’s figure is the average of that week’s invoices, so it moves with which chargers the car used and what they billed that week. The same numbers are also shown by place.

What it leaves out. Only charging invoices from August 25, the first day TezLab’s record covers, are counted: 3 invoices from before that (82.5 kWh, $38.36 billed) are in no figure here. Charging that cost nothing, like a free Level 2 plug, has no invoice. The Charge page also prints 41.7¢ (the same dollars over the 1,060 kWh that reached the battery, free plug included) and 43.1¢ (Supercharger kWh only); this figure divides by the kWh the carmaker billed. A charge is counted on the day it started and the cost per mile counts it on the day it ended, so at the edge of a range the two can differ by one charge.

The second figure. What each kWh that reached the battery cost, with the energy lost on the way paid for too. It counts only the charges both records saw, the same as the Charge page.

On-peak and off-peak. From the owner’s rate card, not from the carmaker’s invoices. An invoice carries the rate billed, not the hours it fell in, so a charge counts as on-peak or off-peak only when its billed rate equals one on the card. The owner puts off-peak overnight.

What it is. What the carmaker billed for charging, divided by the miles the car drove. It comes from the invoices, so it already includes the energy lost between the plug and the battery. Miles driven on free charging, like a Level 2 plug that costs nothing, are counted and add no dollars, which lowers the figure; about 3% of the energy, 33 kWh, was free.

Why it moves. A week’s figure divides the dollars on that week’s invoices by that week’s miles, and charging does not line up with driving: a charge on one day pays for miles on later days. It is the price paid for each kWh times the kWh used for each mile, so a higher rate, lower efficiency, more energy lost in charging or parking, or less free charging all raise it. The whole record is the steadier figure.

What it leaves out. Energy only. Insurance, the FSD (Supervised) subscription and Premium Connectivity are separate lines on the Ledger. Tires, registration and maintenance have no invoice in the Ledger yet, so none is priced.

What it is. Energy the carmaker billed for that never reached the battery. The invoice counts what left the charger and TezLab counts what reached the battery; the gap is the loss. It is measured here, not explained: the two records say how large the gap is, not why.

Why it moves. A charge counts only when TezLab’s record covers at least 85% of the carmaker’s charging window. When TezLab starts late or stops early, the two records are not measuring the same energy, so the charge is held out of the number. Its price still counts in the billed rate.

What it leaves out. Charging that cost nothing, like a free Level 2 plug, has no invoice and so has no loss figure.

What it is. How far the car goes on each kWh against the figure it is rated for: 100% is the rated figure. Each day is weighted by its miles, so a long day counts for more than a short one.

Why it moves. In general, speed, temperature, terrain and climate control move efficiency. This record measures the result for each day, not the reason.

What it is. Every mile TezLab recorded the car driving, from August 25, for any purpose: deliveries, errands and the road trip.

What it leaves out. The 227 miles between delivery and TezLab’s first recorded drive, and 8 miles the log has not yet placed on a day. The odometer has moved 3,662 miles since delivery. A day the car did not move is a real zero: TezLab recorded no drive and the battery read the same before and after, with no charge between. August 23 and August 24 have no miles at all.

What it is. The share of miles driven with FSD (Supervised) engaged, counted from the drive log. It is driver assistance and needs an attentive driver for every mile, including a day at 100%.

What it is. What the apps credited for work where the car was part of the job, from their own screens. Pending means the app has credited it and the cash has not yet been confirmed as received.

What it leaves out. The car’s costs and tax: it is what was credited, not profit. A day with no bar had no income logged: a day with nothing recorded, not a day that earned zero.