Negative values of E_Grid

[SolarDrummer]

Hi all,

I wat to ask about negative values in table "Energy use and user`s needs".

If i understand correctly, it means that in this month station gets electricity from grid, is that true?

(for example: January and December)

[Michele Oliosi]

Yes, that is indeed the case. When E_Grid is negative it means that in total you are drawing power from the grid.

[André Mermoud]

You don't tell which Storage strategy you have used for this result. Probably a self-consumption system.

In this mode, you have a user's consumption that may be satisfied either by the solar resource, or from the grid, according to the PV availability. It is quite normal that if the solar resource is not sufficient, the energy drawn from the grid is superior to the energy provided to the grid.

[SolarDrummer]

Thanks