2002 S40T Battery size did you install?

[PLANT]

So nice sunny 20 degree day 3/4 tank of fuel. 304500kms service not due 307000km
New battery in car March 2023.
Have only driven short 5-10km distances with the odd 20 minute drive over past 6 months.
Car garaged overnight and it's been winter down here.. Australia.

Issues:
1. 28th April car stopped at Red traffic lights. Waiting in drive. Restarted straight away.
2. 1st May car stopped at Red traffic lights. All lights dollars in dash. Started straight away.
3. 16th May car stopped on reverse in garage. Noted coolant leak on floor.
4. 20th May car stalled at lights again.
5. 15th August Car driven from garage, parked. All lights no sound. Eventually started after 10 minutes.
6. 21st August drove 5kms parked, drove 10 km parked and in return to car all lights, no sound from engine. after multiple attempts and 20 minutes eventually cranked and then started.
7th 3rd September drove 5 km parked and then drove another 3km parked and car parked in sun. returned to car. All lights no sound. Battery light green, terminals clean.
Tried let different way, open glove box open door popped hood, all levels looked good, reading lights turn on inside car, moved brake pedal, moved auto gear change into neutral, drive park. handbrake in off. After about 15 minutes car starts and runs normal?

Drove the car 20+ minutes, stopped at traffic lights no issues after today's issue.

So things to check?
Electrical?
Fuses?
Wires/ cables?
Starter motor?
Alternator?

Looking like something in the LOOM going by this post thread: https://www.volvoforums.org.uk/showt...=144411&page=4