Solar Newb

Hi, I spent a substantial amount of getting a solar system installed at my home. I have a 5.5kv DEYE inverter with 6 solar panels totaling just over 3k watts. I also have a Felicity 8.7kv felicity solar battery connected. I understood when buying the system that I would be limited to the 5,5kv of the inverter when load shedding, but what I was not expecting, is that I am also limited to the 5.5kv when the power is on. My electrician assured me that this is normal, but, I'm not convinced and would like a second opinion. So, now, even with Eskom power on, I have to still watch out for what I am using and if I say have some lights on at night, cook with the oven, and put the dishwasher on... the lights trip and I have to wait about 30s for them to return, which it does automatically with the error AC_OVERLOAD. So, my question is, is this normal? Or should I get another electrician out to take a look? Thanks in advance...