GMC · 2024
Sierra EV Denali Edition 1
Premium electric work truck. Here's what its onboard charger actually needs from your home's electrical panel.
Home (Level 2) charging facts
Pulled straight from the Sierra EV Denali Edition 1's onboard charger rating - not a generic EV number.
- Onboard charger draw
- 19.2 kW
- ~80A at 240V (kW × 1000 ÷ 240)
- Empty-to-full at max Level 2
- 10.7 hrs
- 205 kWh battery ÷ 19.2 kW
- Range added per hour
- ~38 mi/hr
- 19.2 kW × 2 mi/kWh efficiency
- DC fast charging
- 350 kW max
- Public chargers only - tapers as the battery fills
Typical full-speed install
80A charger on a 100A circuit
Reaches this car's 19.2 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 Sierra EV Denali Edition 1 specifically, that connector carries up to 19.2 kW at home on Level 2 and up to 350 kW on public DC fast hardware.
Charging speed by circuit size
None of these common home circuit sizes reach this car's 19.2 kW onboard ceiling - it can use every amp up to 48A.
| Charger setting | This car actually draws | Range added / hour | 8-hr overnight |
|---|---|---|---|
| 16A | 3.8 kW | ~8 mi | ~64 mi |
| 24A | 5.8 kW | ~12 mi | ~96 mi |
| 32A | 7.7 kW | ~15 mi | ~120 mi |
| 40A | 9.6 kW | ~19 mi | ~152 mi |
| 48A | 11.5 kW | ~23 mi | ~184 mi |
Overnight, at full onboard speed
304 mi / 8 hrs
380 mi across a 10-hour window, at 19.2 kW.
Approximate cost to fill from empty
$26.65
Assumes $0.13/kWh (a national-average estimate, not your local rate) × 205 kWh - about $0.065/mile.
GMC Sierra EV charging questions
How long does it take to charge a 2024 GMC Sierra EV Denali Edition 1 on a Level 2 charger?
About 10.7 hours from empty to full at its 19.2 kW onboard-charger ceiling (205 kWh battery ÷ 19.2 kW).
Times scale with amperage - see the circuit-size table above for other settings.
What amperage does a GMC Sierra EV draw on Level 2?
At its full 19.2 kW rate, the GMC Sierra EV draws about 80A at 240V (kW × 1000 ÷ 240 = amps).
Can a GMC Sierra EV use a 48-amp charger?
Yes, and it'll use the full 48A. A 48A charger delivers ~11.5 kW, which is at or under this car's 19.2 kW ceiling - about 23 mi of range per hour.
How much range does a GMC Sierra EV add per hour on a Level 2 charger?
About 38 miles of range per hour at its 19.2 kW ceiling (19.2 kW × 2 mi/kWh efficiency).
How much range does an 8-hour overnight charge add to a GMC Sierra EV?
Roughly 304 miles from an 8-hour overnight charge (38 mi/hr × 8 hours), or about 380 miles across a 10-hour window.
What's the DC fast charging ceiling for a GMC Sierra EV?
Up to 350 kW on a public DC fast charger - well above its 19.2 kW Level 2 (home) ceiling, though DC fast rates taper as the battery fills.
Other GMC 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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