The Audi Q8 e-tron carries one of the largest batteries in any production EV — 114 kWh gross (106 kWh usable). That's a lot of energy to push through a charging cable every night, and picking the wrong charger means you're leaving range on the table.
Here's what actually matters when choosing a home charger for the Q8 e-tron or SQ8 e-tron.
Know Your Onboard Charger First
The charger you bolt to your wall doesn't determine charging speed on its own. Your car's onboard charger is the bottleneck — it converts AC from the wall unit into DC for the battery.
- Q8 e-tron (all trims): 11kW onboard charger
- SQ8 e-tron: 11kW standard, 22kW available (check your build sheet)
The wall unit (EVSE) just supplies AC power. If your EVSE can deliver 11.5kW but your car only accepts 11kW, you get 11kW. If your EVSE only delivers 7.7kW on a 32A circuit, that's all the car gets regardless of its capacity.
For the standard Q8 e-tron, you want a 48A charger on a 60A breaker to hit that 11kW ceiling. A 40A charger on a 50A breaker gets you to 9.6kW — close, but about an hour slower on a full charge cycle.
For the SQ8 with the 22kW option, you'd need an 80A charger on a 100A breaker to approach 19.2kW on single-phase 240V. That's a significant electrical install, but it cuts charge time nearly in half.
Charge Time Math
With the 106 kWh usable battery, here's what a typical 20% to 90% charge looks like (the range most people actually use):
| Setup | Power | Time (20% → 90%) |
|---|---|---|
| 40A / NEMA 14-50 | 9.6 kW | ~7.7 hours |
| 48A / hardwired | 11.5 kW | ~6.4 hours |
| 80A / hardwired (SQ8 22kW) | 19.2 kW | ~3.9 hours |
All three scenarios finish overnight. The 48A setup is the sweet spot for Q8 e-tron owners — it maxes out the onboard charger without the heavy electrical work of a 100A circuit.
Three Chargers Worth Buying
Emporia Smart Home EV Charger — Best Value
48A, hardwired or NEMA 14-50, WiFi connected
The Emporia delivers 48A at 240V (11.5kW) for under $400 — less than half the price of most name-brand alternatives. It has WiFi for scheduling and energy monitoring, a clean wall-mount design, and a 24-foot cable. At 48A hardwired, it maxes out the Q8 e-tron's onboard charger.
The app is basic compared to ChargePoint, but it handles scheduling and energy tracking, which is all most people need. Hardwire it on a 60A breaker for full output, or plug into a NEMA 14-50 at a derated 40A.
Check Price on AmazonChargePoint Home Flex — Best App Experience
16A–50A adjustable, hardwired or NEMA 14-50, WiFi connected
The Home Flex adjusts from 16A to 50A, making it work on circuits from 20A to 60A. At 50A hardwired on a 60A breaker, it delivers 12kW — more than enough for the Q8 e-tron. The ChargePoint app is the best in the business: real-time charging data, energy cost tracking, Alexa/Google integration, and automatic scheduling around utility rate windows.
It costs more than the Emporia ($600–$700 range), but the adjustable amperage means you can move it between homes without worrying about circuit compatibility. The 23-foot cable is a touch short for larger garages — measure before you buy.
Check Price on AmazonAutel MaxiCharger — Best for SQ8 Owners
Up to 50A (NEMA 14-50) or hardwired up to 80A, WiFi/Bluetooth
The MaxiCharger stands out because the hardwired version supports up to 80A on a 100A circuit, delivering 19.2kW. That's the only way to take real advantage of the SQ8 e-tron's 22kW-capable onboard charger on North American single-phase power.
It's also built like a tank — NEMA 4X rated for outdoor installation, with a 25-foot cable and a solid app. Expect to pay $600–$800 depending on the configuration. For standard Q8 e-tron owners who don't need 80A, the Emporia or ChargePoint offer better value.
Check Price on AmazonWhat to Skip
32A chargers. They deliver 7.7kW, which wastes roughly 30% of the Q8 e-tron's onboard charger capacity. With a 106 kWh battery, that adds 2–3 extra hours per full charge compared to a 48A unit.
The included Audi portable charger. It works for emergencies, but it's typically limited to 32A and has a short cable. A dedicated wall unit is more reliable and faster.
Cheap no-name units on Amazon. EV chargers handle serious current for hours at a time. Stick with brands that have UL listing and actual warranty support.
Installation Notes
For a 48A charger (recommended for most Q8 e-tron owners):
- 60A dedicated breaker in your panel
- 6-gauge wire (copper) for runs under 50 feet
- Hardwired connection for full 48A output, or NEMA 14-50 at 40A
- Budget $300–$800 for electrician installation depending on panel distance
If your panel is already near capacity, ask your electrician about a load management device or subpanel before committing to a 60A circuit. The Q8 e-tron's large battery makes it worth doing the electrical work right the first time — you'll use every watt of that 11kW charger.
