New generator technology product

If we want to get all pedantic - these battery packs are really doing the same thing as a petrol generator, which should really be called a genset anyway. They are both converting chemical potential energy to electrical energy. The difference is in how you replenish the chemical potential energy, in a genset you pour in more chemical, in a battery pack you put it back as electricity.

Now I agree it is all marketing bunk, but what isn't these days? These things can replace some petrol-powered generators in some situations, but not all petrol generators in all situations.