Wilmac
Bought an EFB (enhanced flooded battery- Varta N65, 65aH, 650A) for the XT and had no further issues. The removed battery maintained its voltage for a month after disconnection, proving the issue was with the car discharge load. Changing the car now for an Forester e-boxer and the first thing the garage did was change the battery for an EFB as per Subaru’s instructions. Will let you know how this goes🤞