Tesla Model S Plaid / LR and Mercedes EQS. German car with charging is worse, but better [we think] • ELECTROMAGNETS

The German channel Autogefuehl presented the Mercedes EQS charging curve, built according to the manufacturer's measurements. Thanks to this, the manufacturer is trying to defend the use of the 400-volt architecture, which seems a little outdated compared to the 800-volt architecture. However, it doesn't have to be that way.

Mercedes EQS charging curve: +1 200 km / h peak

Table of contents

• Mercedes EQS charging curve: +1 200 km / h peak
  • Tesla Model S Plaid / LR charging curve: +1 km / h above 459 kW
  • Tesla wins with a short shot, Mercedes with a longer stop

The charging power (red graph) instantly starts to exceed 200 kW at 6 percent of the battery capacity, leaving up to 30 percent of the battery capacity. The energy replenishment process from 0 to 80 percent (blue graph) takes 31 minutes:

Mercedes EQS charging curve. Manufacturer Promises (c) Autogefuehl, Mercedes / Daimler

The decrease from 200 to 150 kW is almost linear and takes up to 55-56 percent of the battery. With 80 percent of the battery charge, the charging power reaches 115 kW, it is difficult to say if the further drop will be sharp or not. However, it is not difficult to judge that charging should start from about 4-5 percent and:

1. finish at 30 percent if we want the highest possible charging power in relation to idle time,
2. choose any number between 30 and 80 percent for optimal charging times.

Assuming we are dealing with a 107,8 kWh battery, after 8 minutes of inactivity (6 -> 30 percent, case 1) we will have an additional 25,9 kWh of energy on the charger, which should allow us to cover almost 160 kilometers. This gives a charging speed of +1 200 km / h, +200 km / 10 min. The InsideEVs portal that inspired us to do this calculation even lists +193 WLTP units.

Tesla Model S Plaid / LR charging curve: +1 km / h above 459 kW

The charging curve of the Tesla Model S Plaid on the Supercharger v3 is similar, although the decline is faster. User measurements show that 250 kW is kept in the 10 to 30 percent range. This will take about 4,5 minutes:

The next 2,5 minutes - more than 200 kW, in 6 minutes the car gains + 32 percent of the battery, restores 8 percent charge in 35 minutes. With a 90kWh Tesla Model S Plaid battery, this gives 31,6kWh of power. The manufacturer claims that the range of the car in the Plaid version is 637 kilometers EPA, in the Long Range version - 652 kilometers EPA. Although it is not yet on the market, let's take the latest model to the workshop, because it is a functional analogue of the Mercedes EQS 580 4Matic.

Tesla is known for "optimizing" EPA results, so let's assume the above figure is 15 percent inflated, which is real assortment of Tesla Model S Plaid LR should be 554 kilometers. An 8 minute stop at Supercharger v3 gives us 194,5 km.which is +1 km / h, +459 km / 243 min.

Tesla wins with a short shot, Mercedes with a longer stop

Thus, calculations show that The Tesla Model S Plaid is marginally better than the Mercedes EQS when it comes to energy replenishment rates in the range when power is at its highest and exceeds 200 kW.... But be careful: it's enough if we linger a little at the charging station and Tesla's edge starts to fade quickly.

Tesla discharges 10 to 80 percent of its battery (63 kWh) in 24 minutes. We then rebuild 388 kilometers. Mercedes EQS in the same 24 minutes is able to replenish energy from 6 to 70 percent of the battery, which gives an additional 69 kWh of energy and 421 kilometers of range. The ranges are different (Model S Plaid from ~ 10%, EQS from ~ 6%), but you can immediately see that Despite the lower maximum charging power, Mercedes has better planned the recharge curve.... After about 20 minutes of inactivity on the Tesla S Plaid charger, it starts to lose the race.

And if it turns out that the German limousine is actually just as energy efficient as this German Mercedes EQS 450+ test shows, it becomes clear why Tesla wants to bump the Supercharger's charging power to 280 kW. Tesla is not pursued by competitors, but by Musk's company, which must fight to stay in the lead.

Editorial Note www.elektrowoz.pl: It is worth remembering that Tesla Model S Plaid and Mercedes EQS are not direct competitors, Model S is E class, EQS is F segment among manufacturers. We also emphasize that the above calculations are only calculations based on residual market data. 

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