The cash value
Tesla Supercharging in the UK averages roughly £0.45–£0.65 per kWh, and the Model 3 uses about 0.25 kWh per mile. So 650 miles of free Supercharging is worth approximately:
~325
kWh of free electricity
£145–£210
Equivalent cash value (UK)
$95–$130
Equivalent cash value (US)
What you can actually do with 650 miles
- London → Edinburgh and back with miles to spare
- ~6 weeks of average UK commuting (commute under 30 miles/day)
- A full Scottish Highlands road trip
- LA → San Francisco return with credit left over
Tips to maximise the credit
- Use it on long trips — Supercharger pricing is highest on motorways, so this is where the credit goes furthest.
- Charge to 80%, not 100% — speeds drop dramatically above 80%, so you'll get more "free miles" by stopping earlier.
- Avoid peak-pricing windows if your local Supercharger uses time-of-day pricing — your free miles get burned at the higher rate.
- Use it before it expires — credits typically last 6 months from delivery.