NHTSA Complaint #11608616 — 2022 VOLVO XC60

This Volvo XC60 B8 has a serious deficiency with the 12v system and main Battery where it discharges below 10v when the vehicle sits idol for more than a week. Every 7-10 day interval the vehicle must be jump-started and driven for 30 min to recharge the 12v system. The vehicle reports itself in limp-mode until the 12v system charges above 11v then switches to normal drive mode for the remainder of the 30 min drive. I installed a battery tender to the POS and NEG posts under the hood but it charges the mild hybrid battery to full then disables continued charging of the 12v system, leaving the 12v main battery under voltage and draining while the car sits idol. We have to drive the vehicle for 30 minutes every 4-5 days to keep the battery charged. Not even Audi or Lamborghini require this much attention to their 12v systems like this 2022 Volvo. This dis-charging issue happens in all types of weather, all year long, and under any parked condition (locked or unlocked) and the factory battery charger only works on the hybrid battery, not the 12v system battery. I have owned other hybrid vehicles that can sit idol for weeks or months at a stretch and will start without issue. While parked, my Camry XLE (Toyota Synergy system mechanically disconnects their traction battery and simultaneously engages the 12v system to keep the Vehicle "aware" via sensors) will sit for months until I return to drive it normally. Volvo dealerships accept this behavior as normal although my experience with hybrid vehicles implies the opposite. I have not been able to uncover any online research that describes my issue with any resolution from Volvo or successful 3rd party auxiliary internal or external charging systems. it has been researched by Volvo to be 'within normal operating parameters'.