John soares

We have a 6500 sph growatt hybrid inverter with 3x 6.5 kwh lithium batteries attached for storage and emergency back up supply. So my question is does anyone know why during high solar input periods usually when my batteries are already full or near full. I get blips in the power supply. It turns of my internet router tv and hifi system and we see a flicker if our lights are on so I’m thinking even with the mains stable that my inverter is causing spikes or surges. I do have a ats switch fitted to allow emergency back up power when the grid goes down. Which it does up here in north east Scotland especially in the winter. I have near maximum string voltage/current inputs with a potential 4000w on one string and 3200w on the other so near maxed out but as we all know they never really achieve panel theoretical maximums So we have 10 x 410w on one string and 8 410w Panels on the second string so a combined solar input wattage of 7300. But we have never seen more than 6500w instantaneous generation even in a perfect Sumer day so well below the allowable 8000w theoretical max with 500v dc per string. any help ir advice would be very very welcome as this is not only bad for our sensitive electronics but really annoying especially when my wife is online in meetings working from home and a full bt router boot up takes several minutes and these interruptions can be as often as every 5 unites when it’s having one of its bad days. Usually only a few times a day though