I ran the exact same test last month on a rainy weekend trip. Regen braking in High mode remained super predictable, and the LFP pack voltage delta stayed under 12 mV on my OBD2 scanner.

Appreciate the honest perspective! Every EV and PHEV platform has trade-offs, and seeing real long-term feedback like this is why independent owner forums are way more useful than brochure numbers.

Checked this with my dealer's senior HV technician at my scheduled service—everything lines up with the latest BYD global technical bulletin.