Does the MG HS Phev charge up the 12v battery when driving in EV mode?

[Westender69]

I’ve been getting a low 12v battery message (drive car within next 3 days) on screen after turning off engine and opening the drivers door. Went for a good 45 minutes drive in EV mode and still got the message after turning off the engine. Went on a similar journey in auto mode and the message disappeared but did return after a few days. Car is coming up to 3 years old. As per the message title grateful for advice on how the 12v battery is charged and if a replacement is likely to be needed. Car has done under 14k with most of the journeys local and in EV mode.

 

[New to MG]

I’ve been getting a low 12v battery message (drive car within next 3 days) on screen after turning off engine and opening the drivers door. Went for a good 45 minutes drive in EV mode and still got the message after turning off the engine. Went on a similar journey in auto mode and the message disappeared but did return after a few days. Car is coming up to 3 years old. As per the message title grateful for advice on how the 12v battery is charged and if a replacement is likely to be needed. Car has done under 14k with most of the journeys local and in EV mode.

You say you have been driving this car for 3 years about 14,000.
This is appearing under : MG HS 2025 Plug-in Hybrid Forum.
May be you could move it to : MG HS / EHS 2020-2024 Plug-in Hybrid Forum

 

[Alb]

Moved to the correct area

 

[Jto]

I’ve been getting a low 12v battery message (drive car within next 3 days) on screen after turning off engine and opening the drivers door. Went for a good 45 minutes drive in EV mode and still got the message after turning off the engine. Went on a similar journey in auto mode and the message disappeared but did return after a few days. Car is coming up to 3 years old. As per the message title grateful for advice on how the 12v battery is charged and if a replacement is likely to be needed. Car has done under 14k with most of the journeys local and in EV mode.

The 12v battery is charged from the high voltage battery by the inverter, the 12v battery sounds like it needs replacing if not holding charge.

 

[Westender69]

Thanks for the advice Jto.