BYD Song Pro DM-i performance and regen efficiency on mountain roads

No_Outcome_4851 | 2026-01-15 03:19 | 21 views

Hi everyone, I’m considering a BYD Song Pro DM-i (or a similar BYD DM-i model) and I’d like to hear from owners who regularly drive in mountainous areas. My typical trip is a round trip of about 200 km, with each leg being roughly 100 km: - Starting altitude: ~1800 m - Lowest point: ~700 m So there’s a net descent of about 1100 m in one direction, and the same climb on the way back. My main questions are: How effective is the regenerative braking on long downhill sections? Does the car regenerate a meaningful amount of battery charge on descents like this, or does the battery fill up quickly and then rely mostly on friction brakes? In real-world mountain driving, how does this impact fuel consumption and EV usage? Does the system manage regen well on long slopes, or do you need to manually adjust driving modes (EV / HEV / brake modes)? I’m especially interested in real experiences, not just official specs. If you’ve driven the Song Pro DM-i (or Song Plus / Qin Plus / similar DM-i models) in mountain terrain, I’d really appreciate your insights. Thanks in advance! 🚗⛰️

Comments (3)

santz007 2026-01-15 10:52

The regenerative braking on my 2025 song plus AKA Sealion 6 AWD DMi with a 18KWH battery is non existant. If I am not wrong, it's similarly non existant across other BYD cars as well. I get an approx EV only range of 70km in v good 25-30C weather although the range estimate always shows 80. Hope this helps, good luck

lawfulcrispy 2026-01-15 14:33

There is a considerable regen on the way down. I even suggest you don't leave with full battery otherwise the car only will use conventional breaking. On really steep downhill I get +60-70 kW peak of recharging. But on the climb side I would strongly reccomend setting SoC on SAVE and a higher % (50-60% so you don't end up too low on battery and resulting in loss of power just when you need most, at climbing. Other option would be leave it on AUTO but change the driving mode from ECO or NORMAL to SPORT. That will improve ICE usage to support SoC. But I really prefer using a higher SAVE SoC. But if your climb is very steep, combine both methods. And obviously expect greater fuel consumption. I don't drive one regularly to tell you how much. But in general it has good fuel efficiency.

gugaiz 2026-01-15 22:42

Thanks, that is good information! As I live up in the mountains, I am planning to play with the charge because I am expecting to "charge it" while going down when I go to the city, and then use that charge when going back home. I am not expecting to avoid charging the car at home, but it will probably be a minimal amount, considering my commutes

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