New ESS Connection - Inverter capped

Hi, Finally got my Victron solar system hooked up to the grid. It’s a 4.5kw model Easyplus II, grid meter on direct cable from ET112 on 40m run to inverter.

However, it seems over approx 2kw it pulls from the grid (battery 100A BMS). Does anyone have any pointers on where I should be looking please? help appreciated!