Hi. My Deye 8 kw inverter change over from grid to battery causes the lights to ‘dip’ and appliances such as fridges and TV to briefly switch off then back on. The changeover time is set at 0 ms on the inverter, but the delay remains. Changeover from battery to grid however is seamless. What could the problem be? This is a new system and the two lithium ion batteries are brand new, only 3 cycles recorded. Any advice please?