EV Range & Battery Consumption Calculation

[Regulus]

I have been using MG HS PHEV 2025 for a year now. One thing that really bugs me is that I start driving with 100 km range battery full, but if my driving consumption is around 18 kwh/100 km, the range decreases more than it should.

So in my opinion if the battery is 21.4 kwh as per the datasheet and this is the consumption from the grid from 0 to full, then I am expecting more than 100 km range if I am consuming less than 21 kwh/100 km. Unless the consumption is less 16 kwh/100 km, the range is always less than 100 km.

Anything I am missing?

 

[Totti1001]

You are forgetting that the battery is not discharged to 0% SOC. Depending on how you drive, there will always be 12-15% left in the battery. On top of that, there are charging losses. That's another 7-10%. If I have 0 km range according to the odometer and then connect it to the charger, around 21 kWh goes into the battery, even though it still has 12-15% capacity left.
In the summer, I was at just under 17 kWh/100 km, including charging losses. In a good two months, I drove almost without the combustion engine, only 3-4 times did it start briefly when accelerating. Here in Germany, the HS only has a 21.4 kWh battery, in England I think it's over 24 kWh.
.

 

[Enshnk]

The battery's net capacity is around 17 kWh. I averaged 13.2 kWh and traveled 118.5 km without starting the gasoline engine. Even though the screen shows 0% battery, you can see 12-15% remaining reserve when checked with an OBD device.

 

[Totti1001]

A good value, but I hope the 13.2 is measured in real terms and not read from the display , because it doesn't really correspond to the actual value. According to the display, I had just under 15 kWh/100 km. In reality, it was around 17 kWh. .

 

[Enshnk]

A good value, but I hope the 13.2 is measured in real terms and not read from the display , because it doesn't really correspond to the actual value. According to the display, I had just under 15 kWh/100 km. In reality, it was around 17 kWh. .

The data displayed on the screen is 13.2. I'm using the charger that came with the car and an additional 30-meter cable. I can't see how much power it's drawing. I haven't checked the OBD data after 118.5 km, but I will during my next test.

 

[Totti1001]

You had a charger with you? Interesting. I only had a Type 2 charging cable with me.
Unfortunately, electric cars are not the same as combustion engines. With a combustion engine, you fill up with 20 litres and you have 20 litres in the tank. With an electric car, you charge 20 kWh, but only about 18 kWh ends up in the battery. Unfortunately, many people forget this and the displays in the on-board computer are usually not very accurate.

 

[Enshnk]

You had a charger with you? Interesting. I only had a Type 2 charging cable with me.
Unfortunately, electric cars are not the same as combustion engines. With a combustion engine, you fill up with 20 litres and you have 20 litres in the tank. With an electric car, you charge 20 kWh, but only about 18 kWh ends up in the battery. Unfortunately, many people forget this and the displays in the on-board computer are usually not very accurate.

Yes, it came with a 10 amp home charger. I know there's a 10% loss in AC charging.

 

[Regulus]

Thank you everyone for their replies. In continental Europe the gross capacity is 21.4. I wonder what the specified net capacity is.

I do understand the power from grid could even be higher due to losses in energy conversion.

From my experience 16-16.5 kwh might be the net capacity if the consumption readings from the car is accurate.