Self consumption at night fully wrong

Normal night consumption at the moment is about 250-300W

The portal always shows incorrectly. See picture below

Batteries drops from 85% → 77% = -8% / 30Kwh (battery pack) * 0.08 = 2.4Kwh / 8h = ~300Wh (it looks like the truth)

Using VM-3P75CT GRID as grid metter

P.S VRM Portal ID (moderated ID for security)