Guides
Ontario ULO EV charging: 3.9¢ overnight math
Ultra-Low Overnight is 3.9¢/kWh from 11pm to 7am, every day - and 39.1¢/kWh on weekday 4–9pm peak. That is about 10× more for the same kilowatt-hours if you miss the window.
- overnight
- 3.9¢/kWh
- weekday peak
- 39.1¢/kWh
- overnight $/100 km
- $0.72
- Ivy DCFC
- $12.77
The four ULO prices
| Period | Rate | When |
|---|---|---|
| Overnight | 3.9¢/kWh | Every day, 11pm–7am |
| Weekend off-peak | 9.8¢/kWh | Weekends and holidays, 7am–11pm |
| Mid-peak | 15.7¢/kWh | Weekdays 7am–4pm and 9–11pm |
| On-peak | 39.1¢/kWh | Weekdays 4–9pm |
Regulated Price Plan rates effective 1 Nov 2025 to 31 Oct 2026. You have to opt into ULO with your local utility - it is not the default Time-of-Use plan. Delivery charges still apply on the bill; these cents are the energy line only.
An 8-hour Level 2 session
A typical 7.2 kW wallbox running for 8 hours uses 57.6 kWh. At 3.9¢ that is $2.25. The same energy at the weekday peak rate is $22.52. That is the whole argument for a timer or vehicle scheduled charge aimed at 11pm.
A Level 2 install in Ontario runs $1,000–$3,500 for most homes, and legally requires an ESA permit plus a Licensed Electrical Contractor.
Overnight vs public charging vs gas
Same 18.5 kWh/100 km reference as the public charging guide. Gas is a mid-size crossover at 8.5 L/100 km and the current Ontario average pump price.
| Scenario | $/100 km |
|---|---|
| ULO overnight energy only | $0.72 |
| ULO blended (80% overnight - calculator default) | $1.05 |
| Ivy DC fast charging ($0.69/kWh) | $12.77 |
| Gas (8.5 L/100 km) | $15.21 |
Ontario electricity rates valid until Oct 31, 2026 (OEB prices effective Nov 1, 2025). New OEB prices start Nov 1, 2026: Ultra-Low Overnight 3.7¢, Time-of-Use off-peak 9.1¢.
OEB RPP prices checked Oct 2026; valid until Oct 31, 2026 and reset every Nov 1. Confirm the current ULO schedule with your local utility before you enroll.
Charging & trips