Lexus · 2023–2026
RZ 450e Premium
Lexus' first dedicated EV. Only 6.6kW onboard charger (28A) — a 32A charger 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 RZ 450e Premium's onboard charger rating - not a generic EV number.
- Onboard charger draw
- 6.6 kW
- ~28A at 240V (kW × 1000 ÷ 240)
- Empty-to-full at max Level 2
- 10.8 hrs
- 71.4 kWh battery ÷ 6.6 kW
- Range added per hour
- ~21 mi/hr
- 6.6 kW × 3.22 mi/kWh efficiency
- DC fast charging
- 150 kW max
- Public chargers only - tapers as the battery fills
Typical full-speed install
32A charger on a 40A circuit
Reaches this car's 6.6 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 RZ 450e Premium specifically, that connector carries up to 6.6 kW at home on Level 2 and up to 150 kW on public DC fast hardware.
Charging speed by circuit size
The Lexus RZ 450e's onboard charger can't use more than 6.6 kW AC no matter how big the circuit - past 32A, 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 | ~12 mi | ~96 mi |
| 24A | 5.8 kW | ~19 mi | ~152 mi |
| 32A | 6.6 kWcapped by car | ~21 mi | ~168 mi |
| 40A | 6.6 kWcapped by car | ~21 mi | ~168 mi |
| 48A | 6.6 kWcapped by car | ~21 mi | ~168 mi |
Overnight, at full onboard speed
168 mi / 8 hrs
210 mi across a 10-hour window, at 6.6 kW.
Approximate cost to fill from empty
$9.28
Assumes $0.13/kWh (a national-average estimate, not your local rate) × 71.4 kWh - about $0.040/mile.
Lexus RZ 450e charging questions
How long does it take to charge a 2023–2026 Lexus RZ 450e Premium on a Level 2 charger?
About 10.8 hours from empty to full at its 6.6 kW onboard-charger ceiling (71.4 kWh battery ÷ 6.6 kW).
Times scale with amperage - see the circuit-size table above for other settings.
What amperage does a Lexus RZ 450e draw on Level 2?
At its full 6.6 kW rate, the Lexus RZ 450e draws about 28A at 240V (kW × 1000 ÷ 240 = amps).
Can a Lexus RZ 450e use a 48-amp charger?
Not to any real benefit. The Lexus RZ 450e's onboard charger tops out at 6.6 kW (~28A) - a 48A charger doesn't charge it any faster than one already sized to 28A.
How much range does a Lexus RZ 450e add per hour on a Level 2 charger?
About 21 miles of range per hour at its 6.6 kW ceiling (6.6 kW × 3.22 mi/kWh efficiency).
How much range does an 8-hour overnight charge add to a Lexus RZ 450e?
Roughly 168 miles from an 8-hour overnight charge (21 mi/hr × 8 hours), or about 210 miles across a 10-hour window.
What's the DC fast charging ceiling for a Lexus RZ 450e?
Up to 150 kW on a public DC fast charger - well above its 6.6 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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