Get reliable energy.
Wind and solar energy are unreliables, even though they're kind of renewable.
Discussion
Batteries 🔋
Dieselgenerator + 4000 L Heizöl
They generate a lot of waste even before manufactured and are not suitable for any meaningful scale of electric generation even in warmer climate.
They might be ok for your summer cottage but for almost any other use case, it's just better to use something that's reliable, scalable, cheaper and that's working for everyone.