Methodology
How we estimate, and how we label
Every estimate on this site comes from the published method below. When the method changes, the version number changes with it.
How we label data
Every important figure carries one of four labels. Behind each label we record the source, the source type, the date collected, the date verified and our confidence.
- VerifiedChecked against manufacturer documents or an independent test. Source linked.
- Owner-reportedAggregated from Nigerian owner reports, with the number of reports shown.
- EstimatedCalculated with our published methodology. Not measured.
- Not yet verifiedWe do not have evidence for this yet, so we show it as a gap rather than guess.
- Read how we label data
Vehicle figures we hold from manufacturers but have not yet checked against a linked source are shown as “manufacturer claims awaiting a source check”. Fictional examples used while we build the site are marked “Demo data”. We never fill a gap with a guess.
Nigerian real-world range, version 1
- Convert to a WLTP basis. CLTC figures are multiplied by 0.83, NEDC by 0.85 and EPA by 1.1.
- Apply a low and a high factor for each driving pattern. The factors allow for heat, constant air conditioning, stop-start traffic and highway speeds.
- Round to the nearest 5 km, so the estimate does not look more precise than it is.
| Driving | Factor range | 500 km WLTP becomes |
|---|---|---|
| City | 78% to 86% | 390 to 430 km |
| Mixed (the headline estimate) | 72% to 82% | 360 to 410 km |
| Highway | 62% to 72% | 310 to 360 km |
These are starting values, set on 01/10/2026. They are not yet calibrated against Nigerian measurements, so every range estimate is shown with low confidence. As owners submit range reports (start and end charge, distance, traffic, air conditioning and load), we will publish their results with the number of reports beside the estimate, and recalibrate. One owner's report never becomes a universal claim.
Energy use and charging cost
Energy use in Nigerian mixed driving is the official consumption on a WLTP basis divided by the midpoint of the mixed factors. Where no official consumption is published we use battery capacity divided by the official range; we use gross capacity when usable capacity is unknown, which slightly overstates energy use.
Charging cost is energy at the battery divided by charging efficiency (AC 88%, DC 92%), multiplied by the price of each energy source in your mix: grid tariff, solar running cost, generator (petrol price divided by the generator's kWh per litre) and public charging.
DC charging times assume an average of 70% of peak power up to 80% and 35% above it. Real charging curves vary by car, temperature and charger.
Total cost of ownership
For 1, 3, 5 and 8 years we add depreciation (purchase price minus estimated value, on a declining balance), loan interest paid during the period, charging, maintenance, insurance (a percentage of the car's value each year), tyres and registration. Without a purchase price we leave out depreciation, insurance and interest, and say so. Comparisons against petrol cover running costs only.
Find my EV
Each car gets plain checks against your answers. A car's range must cover your daily distance with a margin for missed charges: 1.5 times with home charging and dependable power, 2 times with workplace charging, 2.5 times with home charging and unreliable power, and 3 times when you rely on public chargers. One concern places a car under “Needs more planning”; two or more cautions place it under “Worth considering”. There is no hidden score.
Independence
We do not sell cars. Businesses may one day pay for premium listings or sponsored guides, which will always be labelled, but nobody can pay for a verified label, a better estimate or a higher place in the Finder. See About.