I had a Sunsynk 5kW installed recently by a company listed as a Master Intaller . However, I too have a similar issue with glowing LED lights throughout the house. In my case however they glow all the time, load shedding or not. There is no Earth-Neutral bond relay even though I did request it. The backup circuit is on a split neutral.
Any ideas on this? The installer seems too busy to resolve this so I am still withholding the final payment.