Audi · 2024–2025
Q8 e-tron 55 quattro
Full-size luxury EV SUV. Standard 9.6kW onboard charger — a 40A circuit is sufficient. Optional 19.2kW upgrade available. Here's what its onboard charger actually needs from your home's electrical panel.
Home (Level 2) charging facts
Pulled straight from the Q8 e-tron 55 quattro's onboard charger rating - not a generic EV number.
- Onboard charger draw
- 9.6 kW
- ~40A at 240V (kW × 1000 ÷ 240)
- Empty-to-full at max Level 2
- 11.9 hrs
- 114 kWh battery ÷ 9.6 kW
- Range added per hour
- ~23 mi/hr
- 9.6 kW × 2.39 mi/kWh efficiency
- DC fast charging
- 170 kW max
- Public chargers only - tapers as the battery fills
Typical full-speed install
40A charger on a 50A circuit
Reaches this car's 9.6 kW ceiling. Whether your panel has room for that circuit depends on everything else already on it - that's the actual assessment.
Connector
CCS
CCS (Combined Charging System) is the most common connector on non-Tesla EVs for both home Level 2 charging and public DC fast charging.
On the Q8 e-tron 55 quattro specifically, that connector carries up to 9.6 kW at home on Level 2 and up to 170 kW on public DC fast hardware.
Charging speed by circuit size
The Audi Q8 e-tron's onboard charger can't use more than 9.6 kW AC no matter how big the circuit - past 48A, a bigger charger buys you nothing on this car.
| Charger setting | This car actually draws | Range added / hour | 8-hr overnight |
|---|---|---|---|
| 16A | 3.8 kW | ~9 mi | ~72 mi |
| 24A | 5.8 kW | ~14 mi | ~112 mi |
| 32A | 7.7 kW | ~18 mi | ~144 mi |
| 40A | 9.6 kW | ~23 mi | ~184 mi |
| 48A | 9.6 kWcapped by car | ~23 mi | ~184 mi |
Overnight, at full onboard speed
184 mi / 8 hrs
230 mi across a 10-hour window, at 9.6 kW.
Approximate cost to fill from empty
$14.82
Assumes $0.13/kWh (a national-average estimate, not your local rate) × 114 kWh - about $0.054/mile.
Audi Q8 e-tron charging questions
How long does it take to charge a 2024–2025 Audi Q8 e-tron 55 quattro on a Level 2 charger?
About 11.9 hours from empty to full at its 9.6 kW onboard-charger ceiling (114 kWh battery ÷ 9.6 kW).
Times scale with amperage - see the circuit-size table above for other settings.
What amperage does a Audi Q8 e-tron draw on Level 2?
At its full 9.6 kW rate, the Audi Q8 e-tron draws about 40A at 240V (kW × 1000 ÷ 240 = amps).
Can a Audi Q8 e-tron use a 48-amp charger?
Not to any real benefit. The Audi Q8 e-tron's onboard charger tops out at 9.6 kW (~40A) - a 48A charger doesn't charge it any faster than one already sized to 40A.
How much range does a Audi Q8 e-tron add per hour on a Level 2 charger?
About 23 miles of range per hour at its 9.6 kW ceiling (9.6 kW × 2.39 mi/kWh efficiency).
How much range does an 8-hour overnight charge add to a Audi Q8 e-tron?
Roughly 184 miles from an 8-hour overnight charge (23 mi/hr × 8 hours), or about 230 miles across a 10-hour window.
What's the DC fast charging ceiling for a Audi Q8 e-tron?
Up to 170 kW on a public DC fast charger - well above its 9.6 kW Level 2 (home) ceiling, though DC fast rates taper as the battery fills.
Other Audi EVs
Will your panel handle this?
ChargeRight runs the full NEC load calculation against your actual panel - not a generic rule of thumb.
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