44.5 kWh battery becomes 29.1kWh battery

[Dave S]

@sbwithers
That's interesting. I now take ages for the battery to equalise and when it has, it too holds 437 volts!!

 

[Mike]

I’ve booked mine in for 1st February, the first available slot.

 

[Dave S]

I exchange emails with the service team at Frasers of Falkirk about it and we're going to investigate it once Lockdown is over.

 

[Mike]

 

[Cocijo]

Very useful - thank you. Comfort2??

 

[Deleted member 3150]

Update, collected car this morning after the latest BMS update and garage charging up over night. On collection 447v 147 mile on N and 161 on E full charge. (Was only getting 118 max) Got home and better power on driving and 3.4kwh. Normally only shows 2.6kwh 12 mile journey. so was happy. However back in garage right now as battery low voltage error when checking status (Start button twice no foot on pedal). See pics, low volt battery showed 12 volt not 14. Drove back to garage and noted when HV battery engaged LV shows 14 v. Got to garage did same test and check voltage when HV off and noted LV battery initially showed 14v and after a second dropped back to 12v........... update later

 

[Cocijo]

Update, collected car this morning after the latest BMS update and garage charging up over night. On collection 447v 147 mile on N and 161 on E full charge. (Was only getting 118 max) Got home and better power on driving and 3.4kwh. Normally only shows 2.6kwh 12 mile journey. so was happy. However back in garage right now as battery low voltage error when checking status (Start button twice no foot on pedal). See pics, low volt battery showed 12 volt not 14. Drove back to garage and noted when HV battery engaged LV shows 14 v. Got to garage did same test and check voltage when HV off and noted LV battery initially showed 14v and after a second dropped back to 12v........... update later

That sounds normal to me - depending on what 12v systems you’re using.

 

[Deleted member 3150]

Update, collected car this morning after the latest BMS update and garage charging up over night. On collection 447v 147 mile on N and 161 on E full charge. (Was only getting 118 max) Got home and better power on driving and 3.4kwh. Normally only shows 2.6kwh 12 mile journey. so was happy. However back in garage right now as battery low voltage error when checking status (Start button twice no foot on pedal). See pics, low volt battery showed 12 volt not 14. Drove back to garage and noted when HV battery engaged LV shows 14 v. Got to garage did same test and check voltage when HV off and noted LV battery initially showed 14v and after a second dropped back to 12v........... update later

Still here at garage 55 mins and MG have just replied to garage‘s tech support request. so while I sit here apparently they need to unplug the battery for 20 mins to reset. I am not sure how this deals with the obvious issue of the low voltage battery not charged sufficiently????
so I’ll sit here in my mask another half hour

 

[Deleted member 3150]

That sounds normal to me - depending on what 12v systems you’re using.

A normal lead acid battery should show a healthy charge of 12.8 volts. Looks to me like the LV battery is either not holding its charge on not being charged correctly.

 

[Mike]

Very useful - thank you. Comfort2??

 

[Deleted member 3150]

Let us know how you get on....cheers.

Yes the firmware fixed the bug - full charge tonight 151 miles compared to never more than 118

 

[mraines]

im in israel few days after the update that supposed to fix the BMS issue . they told me to drive and charge normaly for 2 weeks and then ill see it solved.

 

[Deleted member 1189]

Mike Procter has just released this information regarding the latest MG ZS EV Updates.

 

[Mike SOS]

I have notice when on charge with Pod-Point I cannot get the charge above 140 miles. Is the free charge limited to that amount?

 

[mraines]

here you can see how long it takes for my never ending battery balance

 

[Yorkshire Dale]

There is a lot of posts on here about the BMS update. Speak to your dealer to see what version you have got. Basically the lastest versions kills the battery. MG are issuing a new version very soon.

Hi all just had a call from mg dealer have to have new battery update