The numbers sound good to me, the alt should be putting out just over 14V at idle, with the lights off. Too bad we don't know the battery voltage just before you parked the car for 10 days. It could have been a little low then.

Trun off the DRLs and headlights during your daytime runs and see if that helps. The radio and alarm system do drain the battery a little. An interior bulb would drain the battery flat within 48 hours.

A trickle charge for 24 hours would ensure a good battery for a long time, I used to do that for my V70 once in a while.

Klaus
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Volvoless. Sold the R. There is now a void...