Not starting

[Voxi1]

I have a 2018 Peugeot 3008 puretech, the car has had an intermittent fault, unlock the car and wing mirrors don't unfold, get in press the start button and nothing, eventually it will start. It makes a beeping noise like its giving a warning ( it has occasionally brought up battery charge fault), we replaced the battery a few months ago and it seemed fine. Then out of the blue started doing it again, diagnostic not bringing up anything but after researching everything was leading to the BPGA unit, my mechanic even spoke to a friend who worked until recently for Peugeot and they said the same, BPGA replaced yesterday and he kept it overnight no issues, brought it back to me this afternoon and within 3 hours it did the same, ive taken it for a good drive, parked it up and 2 hours later went to get in it and same again, any ideas at all what could be the issue? Cheers

[PaulC5]

Check the battery voltage in case you are doing short trips and are not putting enough charge back to replace what is used when starting.

[Voxi1]

I took it for about a 30 minute drive and it still did it again after a couple of hours

[PaulC5]

30 minutes would not be long enough to charge a flat battery. I would check its voltage with a meter, first thing in the day before starting it should be about 12.7 volts if fully charged but if below about 12.5 volts it needs charging.