Question about highway speeds

djtina | 2026-02-19 14:35 | 22 views

So I just got a brand new Seal U DM-I and it’s my first hybrid. Couldn’t find if this was already asked and answered so sorry if it’s a duplicate. I was driving today on highway for the 1st time. When I got into my car battery charge was around 54%, SoC was setup at 25%. Mode setup was HEV/ normal mode. During the drive I used cruise control set at 130km/h. What concerned me is that, a lot of times I could hear the engine sound like it was running at very high RPM ( I only drove ever gasoline cars before so it sounded to me like 5-6k rpm in these cars). Indicator on the left side was in “power “ almost at all times. Is this normal behavior or am I doing something wrong ? Thanks in advance

Comments (2)

TycStyle 2026-02-19 16:09

Hi, the behaviour is normal, but is actually something you can simply avoid, following below. Recommended SOC Strategies: Long Distance / Highway (AWD): Set to SAVE mode with SOC at 50-70%. This ensures the engine maintains a high battery buffer for performance, allowing efficient hybrid operation (HEV). City / Short Distance: Use EV mode or AUTO mode. For maximum efficiency when you can charge at your destination, keep the SOC lower (e.g., 25-30%). Hilly / Mountain Terrain: Set SAVE mode to 70% before the climb to ensure the battery doesn't drain, which could lead to power limitations. Daily Driving/Commuting: Use EV Mode for maximum, efficient, electric-only driving. As a result, the car will remain at high soc on highways, with a gentle recharge while driving at higher speeds when the ice is supporting in parallel. The battery will regen aggressively when reaching 20-25% at all cost. So that's what you want to avoid. Once you get the hang of it (and it's pretty straightforward) you'll enjoy the smooth ride and power when needed. Cheers

djtina 2026-02-19 16:41

wow ok thanks for great response. I’ll try that soon and see what comes out of it

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