[lina]

Originally Posted by srimedico

Greetings all,


August 2021, ~27000 Kms on odometer, day journey 3am to 3pm, Hot climate (active battery cooling kicked off quite frequently) , 387kms, Ibrahimpatnam to Kurnool, not sure about the altitude (but had Hilly area runs of certain kms ), Head lights off, No AC, only fan, windows rolled up, didnot run behind big trucks this time, so more air resistance , myself solo occupant, Eco, kers3, Cruise Control @ 37 kmph, few stops , 100% (poorly balanced through granny charger) to 12 %, 387 kms

Headlights off at 3AM in the morning on hills? This is not real life and this is dangerous. I really hope EV owners are not driving around conducting experiments like this.

Also, driving in the heat without AC behind trucks is not really "real life".

I just completed a trip to kunigal and back which included dropping the wife and kid off at work/school. Ac on all the time, 4 passengers with a full boot. Drove like I would drive any other car, cruising on the highway at about 90kmph.



The real world range with AC in the ZS EV is about 280km. If you go downhill you will get a lot more range and a lot less if you go uphill.

Also, headlights are rated at about 100W total. Thats not going to eat into your range. So, please for everyone's sake, never drive without headlights!

[BennyA23]

Originally Posted by srimedico

But I always charge it to 100%. Some are saying its bad. But my battery seem to hold up well for 1.5 yr/30k kms

Is this your daily driver?

[flanker]

Originally Posted by lina

Also, headlights are rated at about 100W total. Thats not going to eat into your range. So, please for everyone's sake, never drive without headlights!

No one should drive without headlights (and tail lights) in the night. Although, it does eat into the range. The headlights are 120w and tail lights are 40w. If you did this journey all at night then it would would be 1.2kwh (for a 8 hour drive). With the efficiency you got at 7.2 km/kwh, this would be additional 10 km of range.

It is bizarre to have halogens all round in the EV. On my car, I have switched them out for LEDs.

[StarrySky]

Originally Posted by srimedico

May this thread be used to share the real world statistics and roughly arrive at battery degradation, Range drop . And discuss upon possible ways to decrease the degradation, if its worthwhile.

Based on the statistics from the trip computer, in the first trip you covered 436km with consumption/efficiency of 11.3km/kWh. So you used up about 38.58kW during the trip and this equated to 91% of the battery capacity. This means you might have been able to extract about 42.40kWh from the battery by running it down to 0%.

Similar calculation for your second trip gives battery capacity of 40.72kWh.

So, the degradation seems to be about 1.7kWh (or 4% of the capacity during the first test).

[lina]

Originally Posted by flanker

No one should drive without headlights (and tail lights) in the night. Although, it does eat into the range. The headlights are 120w and tail lights are 40w. If you did this journey all at night then it would would be 1.2kwh (for a 8 hour drive). With the efficiency you got at 7.2 km/kwh, this would be additional 10 km of range.

It is bizarre to have halogens all round in the EV. On my car, I have switched them out for LEDs.

Yes, I meant it is negligible. In my case it was probably just 1 hour in the dark, So maybe 1 km. Even with OP, it would have been about 4-5 hours in the dark.

Running without headlights is a serious issue these thanks to DRLs. This especially seems to be a problem with 2 wheelers. Extremely dangerous, especially during this time with all the rain.

The lack of LED is baffling just like the lack of climate control and lack of battery percentage being displayed anywhere in the car (in the Excite model).

[Shreyans_Jain]

Originally Posted by lina

The lack of LED is baffling just like the lack of climate control and lack of battery percentage being displayed anywhere in the car (in the Excite model).

Battery % not displayed anywhere in the base model? It should be there on the big screen in the middle. While they didn’t have the Excite model on display when I visited the showroom, the SA explicitly told me that the touchscreen and interface are the same between the two models, only the connected car features and tweeters are missing. Same is mentioned in their brochure.

[flanker]

Originally Posted by Shreyans_Jain

Battery % not displayed anywhere in the base model? It should be there on the big screen in the middle. While they didn’t have the Excite model on display when I visited the showroom, the SA explicitly told me that the touchscreen and interface are the same between the two models, only the connected car features and tweeters are missing. Same is mentioned in their brochure.

The excite only displays the guesstimated distance to empty. In India, the hardware (and hence the software) for the infotainment is completely different between both the models.

[DCharger]

Originally Posted by srimedico

Greetings all,

March 2020., ~ 300kms on odometer, night journey 4pm to 4am , cool climate, 434 kms Tirupati to Gannavaram, not sure about the altitude, Head lights on, No AC, only fan, windows rolled up, ~50% of journey behind slow moving large trucks to decrease air resistance, myself solo occupant, Eco, kers3, Cruise Control @ 40 kmph, only 2 stops of ~90 minutes, 100% (better balanced through granny charger) to 9%, 434 kms

August 2021, ~27000 Kms on odometer, day journey 3am to 3pm, Hot climate (active battery cooling kicked off quite frequently) , 387kms, Ibrahimpatnam to Kurnool, not sure about the altitude (but had Hilly area runs of certain kms ), Head lights off, No AC, only fan, windows rolled up, didnot run behind big trucks this time, so more air resistance , myself solo occupant, Eco, kers3, Cruise Control @ 37 kmph, few stops , 100% (poorly balanced through granny charger) to 12 %, 387 kms

Cruisecontrol @ 40 & 37 without AC ..and that too for more than 12 hours...this is one kind of mileage testing and also patience testing.. Kudos to you, I could never do this in my wildest dreams.

With windows rolled up and no AC, didn't you find any ventilation issues(even with fan running)?

[tj123]

Originally Posted by flanker

It is bizarre to have halogens all round in the EV. On my car, I have switched them out for LEDs.

I believe this is to keep the cost low and as far as I know the auxiliary battery (lead acid) handles this load and it does not eats into the range of the car.

[adityadeva]

Originally Posted by srimedico

I used only portable charger. Only ~25 times I have used fast AC/DC chargers.

Could you you please shed some light on the change in the charging infrastructure from the time you bought the car and now.

[Shresth_EV]

Originally Posted by tj123

I believe this is to keep the cost low and as far as I know the auxiliary battery (lead acid) handles this load and it does not eats into the range of the car.

Yes but it’s the main HV battery which keeps the aux battery topped up at all times.

So while charge comes from aux battery for 12V system, the 12V battery itself is charged from traction battery.

[lina]

Originally Posted by flanker

It is bizarre to have halogens all round in the EV. On my car, I have switched them out for LEDs.

Wont this void the warranty? I also want to switch but dont want to lose out on the 5 year warranty

[flanker]

Originally Posted by lina

Wont this void the warranty? I also want to switch but dont want to lose out on the 5 year warranty

The LED replacement use (much) less current and are drop in replacement that didn't require any alteration to existing wiring or additional wiring. If these LED bulbs are of bad quality and cause damage to the housing or electrical components then yes MG can refuse warranty claims for those issues. Also the original bulb used is Philips HB3LL and is user serviceable. Suppose you swap it out with much brighter halogen like Osram Night Breake, can they use that as a reason to deny warranty claim?

If you ask the service station folks, they will always say the same "Warranty will be void"

I have used Osram HB3 LEDriving Premium for the headlight and Osram 5W5 LED for the tail light and license plate lamps. I changed all of them myself.

[tharian]

Originally Posted by Shresth_EV

Yes but it’s the main HV battery which keeps the aux battery topped up at all times.

So while charge comes from aux battery for 12V system, the 12V battery itself is charged from traction battery.

This was some thing I wanted clarity on few months ago and I couldn't get an answer and so I asked the technician itself. My sister's ZS had an issue in which the aux battery was too low on charge and then failed to power up the main battery.
I remember him saying the aux battery charges through the coventional way when the car is moving. Not sure how far that is true since there is no engine to run an alternator.

Anyway this issue was diagnosed to another part which was replaced

Originally Posted by srimedico

, 100% (poorly balanced through granny charger) to 12 %, 387 kms

What do you refer to as poorly balanced? I use a slow (portable charger) till date on my sister's one year old ZS which is run around 2400 kms. Will follow charging till 90% henceforth too as few mentioned here.

Originally Posted by flanker

The battery cooling pumps in the MG ZS EV have an audible hum that comes through into the cabin.

It is more than a hum at times. Once when I took it out on the highway, it was more like a whir which kind of went up and down depending on the speed. Not sure if it was the fan or something else. That was the only time I heard it.

[flanker]

Originally Posted by tharian

I remember him saying the aux battery charges through the coventional way when the car is moving. Not sure how far that is true since there is no engine to run an alternator.

The 12 V battery is only used for initial boot-up. If the brake pedal is not pressed while pressing the start button then HV battery is not turned on and the accessories run on 12v battery. If the HV battery is tuned on then the DC to DC convertor runs all the accessories and charges the 12v battery. The car doesn't need to be moving for this to happen.

Originally Posted by tharian

What do you refer to as poorly balanced? I use a slow (portable charger) till date on my sister's one year old ZS which is run around 2400 kms. Will follow charging till 90% henceforth too as few mentioned here.

Over time multiple cells end up with different voltage levels and the cell with lowest voltage limits the battery capacity. The balancing is done by the BMS and only on the slow charger. In MG ZS EV the balancing only starts at 92% charge and continues hours after the 100% charge is reached. It is recommended to do a routine full 100% charge and let the slow charger connected well after the 100% charge is reached. I would say once every few months should be fine.

Originally Posted by tharian

It is more than a hum at times.

Yes, it is quite audible