How many kilometres can one charge take a Keke Napep?By the reverse formula, 97–115 km on 60V at 120–140Ah
The direct answer: on African passenger tricycle duty (keke napep, typical West African conditions) combined consumption is typically 65–80 Wh/km. A 60V / 72V pack of 120–140Ah returns about 97–115 km on the 60V platform by the reverse formula on this page, and the published 110–130 km band on 72V. Neither figure is a label range — both are typical averages with rough surfaces, 45°C heat and high-speed cruising folded in; for the label range, use the vehicle and motor plate from your chassis maker. If you only know your daily distance, the table below reverses the calculation into amp-hours. If you run a 150 km route, read the fourth section straight away: the engineering answer there is one mid-route top-up, not a bigger pack.
verifiedRange figures are typical averages, not label claims; payload, gradient, tyre pressure and riding style all move them. No prices are quoted here — a formal quotation governs.
Reverse lookup by daily distance: 100 / 120 / 150 km
The formula: required capacity (Ah) = daily distance (km) × combined consumption (Wh/km) ÷ 88% DoD ÷ nominal voltage (V). The table uses the 65 Wh/km paved-road basis, with 60.0V nominal for the 60V platform and 76.8V (24S) for the 72V platform.
| Daily distance | Required at 60V | Required at 72V | Published pack step | Typical range | Pack model | Charging plan |
|---|---|---|---|---|---|---|
| 100 km / day | ≈ 123 Ah | ≈ 96 Ah | 60V 100Ah | 90 – 105 km | VT-60100-TV | One charge covers the shift; full charge overnight |
| 120 km / day | ≈ 148 Ah | ≈ 115 Ah | 60V 120Ah | 105 – 120 km | VT-60120-BJ | Full charge overnight plus a 30–60 minute midday top-up |
| 150 km / day | ≈ 185 Ah | ≈ 144 Ah | 72V 130Ah | 110 – 130 km | VT-72130-TROPICAL-HD | One mid-route top-up, timed off peak tariff |
On corrugated roads, at full payload or above 45°C, consumption moves to the 80 Wh/km end and the required capacity rises by about 23%; always add a 20% margin on your real daily distance before choosing a step. The published pack column reflects the configuration already documented on this site — the gap between it and the calculated value is exactly the set of variables the next section covers.
Specification notice:The figures above are engineering reference values. They may differ with production batch, configuration and actual duty cycle, and the percentages for life, efficiency, availability and coverage are engineering estimates and bench references. Contact us for the detailed specification sheet.
Five variables that eat the range — and two are free to fix
The same vehicle and the same pack can differ by more than 20% in typical range between two riders. The cause almost always sits in the five items below, and two of them cost nothing to correct.
- Passenger count: the 65 Wh/km basis assumes three passengers plus the driver. With four to five adults aboard, the transient demand at pull-away and on gradients rises and consumption moves towards 80 Wh/km.
- Gradient: loaded climbing bus current reaches two to three times the flat-road figure. Cell voltage sags first and the BMS current limit trips, which the driver feels as a loss of power rather than an empty pack — see the climbing article below.
- Tyre pressure: the item most often overlooked on site and the cheapest to fix. Persistently low pressure raises rolling resistance measurably and shortens both range and tyre life.
- Heat above 40°C: tropical road-surface heat plus temperature rise inside a tight metal battery bay gives a heat derating factor of Kt 0.91–0.94, a range loss of 8%–12%. The BMS derates output automatically with cell temperature.
- Stop-start duty: Lagos vehicles can run 14 hours a day with nine stops and starts per kilometre. Every pull-away is a peak-current event, so typical consumption sits well above steady cruising.
- Bring tyre pressure to the vehicle placard value and set front and rear separately
- Confirm whether the route allows a top-up, and note the socket location and off-peak tariff window
- If more than three passengers are carried routinely, size on the 80 Wh/km basis instead
- Check that the dashboard SOC tracks reality; if it drifts, run one full charge and discharge to recalibrate
Do I need a mid-route top-up? An honest answer for each step
No hedging: the 100 km step does not need one, the 120 km step should take one, and the 150 km step must take one. This is a capacity-versus-weight trade-off, not a shortfall in the pack.
| Daily distance | Recommended pack | Typical range | Charging plan | Mid-route top-up required? |
|---|---|---|---|---|
| 100 km / day | 60V 100Ah (6.0 kWh) | 90 – 105 km | One charge covers the shift; full charge overnight | Not required |
| 120 km / day | 60V 120Ah (7.2 kWh) | 105 – 120 km | Full charge overnight plus a 30–60 minute midday top-up | Recommended |
| 150 km / day | 72V 130Ah (9.98 kWh) | 110 – 130 km | One mid-route top-up, timed off the peak tariff | Required |
Why not fit one larger pack and cover 150 km in a single run? Reversing the formula at 65 Wh/km and 88% DoD, the 72V platform needs roughly 144Ah or more (before the 20% margin), and that weight comes straight out of passenger capacity. So the engineering answer for the 150 km step is “a 130Ah pack plus one top-up”, not “a bigger pack” — which is why we do not publish a one-size-fits-all sizing table.
Specification notice:The figures above are engineering reference values. They may differ with production batch, configuration and actual duty cycle, and the percentages for life, efficiency, availability and coverage are engineering estimates and bench references. Contact us for the detailed specification sheet.
Keke Napep range and capacity questions
How far will one Keke Napep battery pack really go?expand_more
How far does a 60V 100Ah pack go?expand_more
The formula says I need 150Ah — why do you recommend 130Ah?expand_more
Can I calculate the capacity I need myself?expand_more
My vehicle suddenly loses power on a climb — is the pack empty?expand_more
How much range does hot weather cost me?expand_more
Work out how far one charge goes on your route
Send your vehicle, normal passenger load, route gradient and daily distance, and our engineering team will return a capacity recommendation, a typical range band and a clear answer on whether a top-up is needed, within 24 hours on working days, with FOB / CIF pricing against your destination port.
- Modelled on your actual route, not a generic table
- Same-duty fleet references available under NDA
- Price calculated from destination port, payload, daily distance and motor rating
Specification notice:The figures above are engineering reference values. They may differ with production batch, configuration and actual duty cycle, and the percentages for life, efficiency, availability and coverage are engineering estimates and bench references. Contact us for the detailed specification sheet.