Mercedes-Benz EQS 450+ Charging Evaluation: As Quick As Plaid?

The Mercedes-Benz EQS is among the newest electrical automobiles available on the market and in the present day we’ll check out a real-world fast-charging check of the EQS 450+ model (rear-wheel drive).

The check was carried out by our colleague Kyle Conner, for the Out of Spec Critiques channel, at an EVgo fast-charging station in Denver, Colorado. The charger was rated at 350 kW, however extra importantly, was capable of present as much as 500 A, which is essential to achieve excessive energy at about 400 V.

There are two information streams – one from the charger’s show and one from the automotive’s show – that barely differ. We’re focusing solely on the charger’s show.

Within the second a part of the article, we’ll attempt to evaluate the outcomes with a few of the different high-end fashions, just like the Lucid Air and Tesla Mannequin S.

Let’s crunch some numbers!

In keeping with the info obtained from the 0-100% SOC check within the video (charger’s show), charging energy shortly elevated to round 200 kW and remained close to this degree as much as about one-third of the battery capability.

The height charging energy was about 202-203 kW at about 29% SOC. Then, charging energy steadily decreased to about 100 kW at 80% SOC. After that, the lower accelerated, reaching about 40 kW earlier than 90% SOC.

The general form, in addition to the facility degree, is similar to the charging curve shared by the producer in Summer time 2021.

The full power delivered to the automotive (in keeping with the EVgo charger) was 116 kWh.

The charging session from 0-100% took 1 hour and 17 minutes (other than an interruption as a result of 60-minute session restrict), however the extra essential values are:

  • 10-80%: 31 minutes
  • 20-80%: 27 minutes
  • 10-90%: 42 minutes
  • 20-90%: 39 minutes

Charging from 20% to 80% SOC took about 27 minutes and it is not a nasty consequence. The producer guarantees 10-80% SOC in 31 minutes, which was achieved within the check.

The typical energy within the essential vary from 20% to 80% SOC is 153 kW, which is 76% of the height worth. Between 10% and 80%, the common is 158 kW.

The Mercedes-Benz EQS 450+ is provided with a 107.8 kWh battery (usable capability). The producer doesn’t talk the whole battery capability.

Kyle Conner guesses that the whole battery capability is perhaps about 112 kWh, whereas we beforehand guessed 115 kWh.

The height C-rate* – charging energy in relation to the whole battery capability – is round 1.8-1.9C, relying on whether or not one assumes 115 kWh or 108 kWh. The typical C-rate when charging from 20% to 80% SOC can be nearer to 1.3C.

*C-rate tells us how the charging energy pertains to the battery pack capability. For instance: 1C is 1-hour charging energy (present), when the facility worth in kW is the same as the battery pack capability in kWh. 2C can be sufficient to recharge in half an hour.

The speed of vary replenishing will depend on the power consumption and the power consumption will depend on the use case.

Within the case of Mercedes-Benz EQS 450+, we’ve got the WLTP vary of about 770 km (479 miles), in addition to the EPA vary of 350 miles (563 km) (20″ wheels).

  • WLTP
    Considering the WLTP vary of 770 km (479 miles) and accessible battery capability of 107.8 kWh, we are able to assume power consumption of 140 Wh/km (225 Wh/mile). The efficient common pace of vary replenishing when charging from 20% to 80% SOC can be then 18.3 km/minute (11.3 miles/minute).
  • EPA Mixed vary
    Considering the EPA Mixed vary of 350 miles (563 km) and accessible battery capability of 107.8 kWh, we are able to assume power consumption of 308 Wh/mile (191 Wh/km). The efficient common pace of vary replenishing when charging from 20% to 80% SOC can be then 8.3 miles/minute (13.3 km/minute).

The speed of vary replenishing is fairly good, even for the EPA check cycle, however not as excessive as within the case of another EVs.

Right here is our final charging card for the Mercedes-Benz EQS 450+, which reveals an estimated time of charging so as to add a sure variety of SOC % factors, common charging energy, added power and added vary for listed SOC ranges.

The matrix above, is perhaps useful from the person perspective, however remember that it is simply an estimate from a specific check, with measure and calculation uncertainty most likely above 5%. On prime of that comes variation for particular person case – automotive (model, age/battery state-of-health), charger, ambient and battery temperature, software program model and extra (together with cabin heating/cooling throughout charging). One other factor is that the charging curve would possibly shift when charging begins at a decrease/increased SOC.

Comparisons with different EVs

Lucid Air Dream Edition

Lucid Air Dream Version

Tesla Model S Plaid charging (source: Tom Moloughney)

Tesla Mannequin S Plaid (supply: Tom Moloughney)

Now it is time to evaluate the Mercedes-Benz EQS 450+ with the Lucid Air and Tesla Mannequin S Plaid exams (each analyzed right here):

If we evaluate the Mercedes-Benz EQS 450+ with the Lucid Air Dream Version and Tesla Mannequin S Plaid, we’ll discover that there’s a huge distinction within the energy degree within the first half. After 50% SOC, the three curves are extra related to one another.

One would possibly suppose that the EQS fees a lot slower as a result of distinction within the first half. Nevertheless, if we check out the common from 20 to 80% SOC, the EQS is mainly on par with the Lucid Air and barely above the Tesla Mannequin S.

That is a shock, which might not be found with out such detailed evaluation.

DC Quick Charging Comparability by InsideEVs
Mannequin
[data source]
Drive /
Battery
(kWh)
Max
Energy
Avg
Energy
(20-80%)
2022 Mercedes EQS 450+ 20″
[Out of Spec Reviews]
RWD
*107.8 kWh
202 kW 153 kW
2022 Lucid Air Dream Version Vary 19″
[Tom Moloughney]
AWD
118 kWh
302 kW 154 kW
2021 Tesla Mannequin S Plaid 21″ (V3 SC)
[Tom Moloughney]
AWD
*100 kWh
250 kW 139 kW

* EQS battery capability is usable, Tesla Mannequin S battery capability is only a guess

One other discovering is that the charging time from 20 to 80% SOC is 27 minutes, not far behind the Tesla Mannequin S, and 4 minutes sooner than the Lucid Air.

It isn’t intuitive due to the distinction within the battery capability – Lucid fees at increased energy however has additionally extra power to recharge.

*The beginning factors had been adjusted to the bottom frequent SOC.

Within the 10-80% SOC window, the Tesla Mannequin S wants 27.5 minutes, whereas the Lucid Air is over 34 minutes. The Mercedes-Benz EQS was within the center between them at 31 minutes.

DC Quick Charging Comparability by InsideEVs
Mannequin
[data source]
Drive /
Battery
(kWh)
Max
Energy
Avg
Energy
(20-80%)
Time
(20-80%)
(10-80%)
2022 Mercedes EQS 450+ 20″
[Out of Spec Reviews]
RWD
*107.8 kWh
202 kW 153 kW 27 min
31 min
2022 Lucid Air Dream Version Vary 19″
[Tom Moloughney]
AWD
118 kWh
302 kW 154 kW 31 min
34 min
2021 Tesla Mannequin S Plaid 21″ (V3 SC)
[Tom Moloughney]
AWD
*100 kWh
250 kW 139 kW 25 min
27.5 min

* EQS battery capability is usable, Tesla Mannequin S battery capability is only a guess

The C-rate comparability confirms to us that Mercedes-Benz performed it protected within the first a part of the charging curve, not stressing the battery with a excessive charging charge.

Apparently, it is a little bit bit above the opposite two fashions between 55% SOC to over 80% SOC. The typical between 20 and 80% SOC could be very related for all three.

Listed here are the C-Charge numbers, however bear in mind, that we do not know the official battery capability of the Tesla Mannequin S and EQS. It is only a uncooked estimate.

DC Quick Charging Comparability by InsideEVs
Mannequin
[data source]
Drive /
Battery
(kWh)
Max
Energy
Avg
Energy
(20-80%)
Max
C-Charge
Avg
C-Charge
(20-80%)
2022 Mercedes EQS 450+ 20″
[Out of Spec Reviews]
RWD
*107.8 kWh
202 kW 153 kW 1.8 1.3
2022 Lucid Air Dream Version Vary 19″
[Tom Moloughney]
AWD
118 kWh
302 kW 154 kW 2.5 1.3
2021 Tesla Mannequin S Plaid 21″ (V3 SC)
[Tom Moloughney]
AWD
*100 kWh
250 kW 139 kW 2.5 1.4

* EQS battery capability is usable, Tesla Mannequin S battery capability is only a guess

Now, crucial metric from a client perspective – the vary replenishing charge of the Mercedes-Benz EQS. We are going to use the EPA Mixed vary as a base (the one accessible frequent ranking of the three fashions).

EPA vary varies relying on wheel measurement, so we picked just a few variations:

  • Mercedes-Benz EQS 450+ with 20″ wheels
  • Lucid Air Dream Version Vary with 19″ wheels
  • Tesla Mannequin S Lengthy Vary with 19″ wheels
  • Tesla Mannequin S Plaid with 21″ wheels

The chart reveals that the EQS is the slowest of the 4:

The EQS’s common in 20-80% SOC window is 13.3 km/min (8.3 mi/min). That is barely lower than within the case of the performance-oriented Tesla Mannequin S Plaid, which has virtually the identical EPA vary (348 miles) and greater wheels.

One would possibly ask why as a result of the common charging energy is sort of as excessive as Lucid Air. Nicely, the vary/effectivity within the EPA check cycle performs a task right here. A comparability of the WLTP check cycle most likely can be extra favorable for the EQS.

DC Quick Charging Comparability by InsideEVs
Mannequin
[data source]
Drive /
Battery
(kWh)
Avg
Energy
(20-80%)
EPA vary
rep. charge
(20-80%)
2022 Mercedes EQS 450+ 20″
[Out of Spec Reviews]
RWD
*107.8 kWh
153 kW 13.3 km/min
(8.3 mi/min)
2022 Lucid Air Dream Version Vary 19″
[Tom Moloughney]
AWD
118 kWh
154 kW 18.2 km/min
(11.3 mi/min)
2021 Tesla Mannequin S Plaid 21″ (V3 SC)
[Tom Moloughney]
AWD
*100 kWh
139 kW 13.7 km/min
(8.5 mi/min)
2021 Tesla Mannequin S Plaid 19″ (V3 SC)
[Tom Moloughney]
AWD
*100 kWh
139 kW 15.9 km/min
(9.9 mi/min)

* EQS battery capability is usable, Tesla Mannequin S battery capability is only a guess

The DC quick charging check of the Mercedes-Benz EQS confirms that it is one of many quickest charging electrical automobiles available on the market, however not as quick because the Lucid Air or Tesla Mannequin S. The distinction in vary replenishing pace in comparison with Lucid Air is substantial.

The height charging energy of simply above 200 kW is a weak level – it could possibly be increased to enhance the outcomes.

The 400-volt battery structure is one other factor – the swap to an 800 V battery system (like within the Lucid Air or Porsche Taycan) is perhaps a good suggestion.

2022 Mercedes EQS 450+ 20″ (107.6 kWh, RWD) :: DC Quick Charging Abstract by InsideEVs
Drive: RWD; Battery pack (web / whole): 107.8 / N/A
[Data source: Out of Spec Reviews]
Peak Energy
Peak C-rate

Common Energy (20-80% SOC)
Common-to-Peak Energy
Common C-rate (20-80% SOC)

Time (20-80% SOC)

202 kW
roughly 1.8

153 kW
75%
roughly 1.3

27 min

Vary Replenishing Velocity (Common 20-80% SOC):
WLTP
EPA Mixed
18.3 km/min (11.3 mi/min)
13.3 km/min (8.3 mi/min)

Common information:

* Some values on the charts are estimated from the info supply.

** Temperature of the battery cells would possibly extremely negatively have an effect on charging capabilities. We do not have information about temperatures of the battery firstly and through the charging course of. In chilly or sizzling climate, in addition to after driving very dynamically, charging energy is perhaps considerably decrease than proven on the charts (in excessive instances charging is perhaps unattainable till the battery temperature is not going to return to an appropriate degree).