Ownership tool
Commute charging planner
Enter your daily miles, pack size and charge window to see how many days one charge covers and how often you plug in each week — with a home-charger adequacy check or a DC fast-charge plan.
Charges per week
~1.1/wk
About 1.2 h of home charging covers a day's driving — no public stalls needed
One charge covers about 4.4 commute days; the week needs 60.0 kWh.
| Daily commute energy | 12.0 kWh |
|---|---|
| Weekly commute energy | 60.0 kWh |
| Usable energy per session | 52.5 kWh |
| Commute days per charge | 4.4 days |
| Overnight charge added | 79.2 kWh |
How it is calculated
Daily energy = daily miles × efficiency ÷ 100; usable energy per session = pack × (charge target − floor) ÷ 100.
Weekly sessions = weekly energy ÷ usable per session. Home adequacy compares overnight kWh added (hours × kW × efficiency) against daily consumption.
DC session time assumes constant power plus a 15% taper allowance; cold weather and station queues stretch real-world times.
How to fill each field
- Charge windowTarget minus floor is the usable slice: charging to 90% and driving to 20% gives you 70% of the pack per session.
- Home powerLevel 2 home chargers deliver 7.7–11.5kW depending on the circuit. Enter 0 to switch the planner into DC-only mode.
- EfficiencyUse your trailing 1,000-mile dash average. Cold snaps add 20–30% — enter the winter figure for a safer plan.
FAQ
How many charges a week for a 40-mile daily commute?
A 75kWh pack in a 90%→20% window gives 52.5 kWh usable; 40 mi at 30 kWh/100 mi uses 12 kWh a day, so about 1.1 charges a week. An 11kW Level 2 refills a day's driving in about 1.2 hours.
Is a 7.7kW Level 2 enough for commuting?
Overnight for 8 hours it adds about 55 kWh — enough for a 180-mile day at 30 kWh/100 mi. Only very long commutes or short parking windows outgrow it.
How do I plan without home charging?
Budget roughly one DC stop a week at these defaults. Pick a fixed weekly slot off-peak, and in winter raise the charge target temporarily instead of adding sessions.
What charge floor should I set?
15–20% keeps a buffer for detours and protects the pack. LFP batteries can routinely charge to 100% for BMS calibration; NMC packs are happier at 80–90% daily.
My commute is 80 miles a day — is a 75kWh pack enough?
That's about 24 kWh a day; the 52.5 kWh window covers two days, so you'd charge 2–3 times a week. Home Level 2 still refills a day's worth in about 2.4 hours overnight.