30…40% is very ideal number, 15…25% is often the reality.
A good hybrid can do very well. Presumably by keeping the engine in exactly its sweet spot and designing aggressively for that. BYD for example claims 46% thermal efficiency. [0]
[0] https://ev.com/news/byd-hybrid-efficiency
alt Hacker News
A good hybrid can do very well. Presumably by keeping the engine in exactly its sweet spot and designing aggressively for that. BYD for example claims 46% thermal efficiency. [0]
[0] https://ev.com/news/byd-hybrid-efficiency