Rolls-Royce · 2024–2026
Spectre Standard
Most expensive BEV on sale — $397,750+. Rolls-Royce's first electric car. 577 HP, 11kW onboard charger. 48A Level 2 is sufficient. Here's what its onboard charger actually needs from your home's electrical panel.
Home (Level 2) charging facts
Pulled straight from the Spectre Standard's onboard charger rating - not a generic EV number.
- Onboard charger draw
- 11 kW
- ~46A at 240V (kW × 1000 ÷ 240)
- Empty-to-full at max Level 2
- 9.3 hrs
- 102 kWh battery ÷ 11 kW
- Range added per hour
- ~27 mi/hr
- 11 kW × 2.46 mi/kWh efficiency
- DC fast charging
- 195 kW max
- Public chargers only - tapers as the battery fills
Typical full-speed install
48A charger on a 60A circuit
Reaches this car's 11 kW ceiling. Whether your panel has room for that circuit depends on everything else already on it - that's the actual assessment.
Connector
NACS
NACS (North American Charging Standard, originally Tesla's plug) is now the connector most new EVs are shipping with for both home Level 2 and public DC fast charging.
On the Spectre Standard specifically, that connector carries up to 11 kW at home on Level 2 and up to 195 kW on public DC fast hardware.
Charging speed by circuit size
The Rolls-Royce Spectre's onboard charger can't use more than 11 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 | ~19 mi | ~152 mi |
| 40A | 9.6 kW | ~24 mi | ~192 mi |
| 48A | 11.0 kWcapped by car | ~27 mi | ~216 mi |
Overnight, at full onboard speed
216 mi / 8 hrs
270 mi across a 10-hour window, at 11 kW.
Approximate cost to fill from empty
$13.26
Assumes $0.13/kWh (a national-average estimate, not your local rate) × 102 kWh - about $0.053/mile.
Rolls-Royce Spectre charging questions
How long does it take to charge a 2024–2026 Rolls-Royce Spectre Standard on a Level 2 charger?
About 9.3 hours from empty to full at its 11 kW onboard-charger ceiling (102 kWh battery ÷ 11 kW).
Times scale with amperage - see the circuit-size table above for other settings.
What amperage does a Rolls-Royce Spectre draw on Level 2?
At its full 11 kW rate, the Rolls-Royce Spectre draws about 46A at 240V (kW × 1000 ÷ 240 = amps).
Can a Rolls-Royce Spectre use a 48-amp charger?
Not to any real benefit. The Rolls-Royce Spectre's onboard charger tops out at 11 kW (~46A) - a 48A charger doesn't charge it any faster than one already sized to 46A.
How much range does a Rolls-Royce Spectre add per hour on a Level 2 charger?
About 27 miles of range per hour at its 11 kW ceiling (11 kW × 2.46 mi/kWh efficiency).
How much range does an 8-hour overnight charge add to a Rolls-Royce Spectre?
Roughly 216 miles from an 8-hour overnight charge (27 mi/hr × 8 hours), or about 270 miles across a 10-hour window.
What's the DC fast charging ceiling for a Rolls-Royce Spectre?
Up to 195 kW on a public DC fast charger - well above its 11 kW Level 2 (home) ceiling, though DC fast rates taper as the battery fills.
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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