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@OneInterestingFact @Edent Ideally, you use the battery to store your own solar production over the day to use in the evening. If your panels cannot fill the entire battery, you fill the rest with cheap energy from the grid (requires a variable energy tariff, of course). Such a setup should usually amortise within a few years. But 4.4kWp is already quite massive. That's not a plug-in panel for your balcony I suppose.

@pmdj @fishidwardrobe @Edent Most modern digital meters should be able to do that even if they don’t come with a smart gateway.

@fishidwardrobe @Edent You plug it into your wall and it makes your meter run more slowly or in reverse. Plug-in solar inverters also often come with apps to track your production.

@Edent @OneInterestingFact Plug-in solar is usually not enough that feeding into the grid is actually worth it (mostly depends on how many forms you have to fill, but you are usually also not paid enough). The main reason you want to have a solar panel on your balcony is to cover your own consumption. Add battery storage to it and you can be quite independent of the grid for a large part of the year.