Spike in power from grid

I have only had my panels for 2-3 months. Occasionally I notice a small spike in drawing power from the grid early in the mornings, despite my battery still having power. Sometimes it aligns against some usage, but not always. I attach some pictures showing the spikes. Whay should that ovccur?

Fridge or freezer cutting in? It is not a lot of energy (cost) as it is a very short time.
The inverter takes time to react to loads and does not start shifting power from the battery instantly