I have all LED lights (tubelights and bulbs) in my house and has been backed up by an inverter (Luminous Eco Volt +1550 with Inverlast 150Ah Tall Tubular Battery).
The issue is when I connect my desktop computer (LG Thinkcenter, Intel Core i5-7400 CPU @3.00GHz, 16GB RAM, 1TB HDD, no CD/DVD drive) and if that is running on Inverter then my room lights starts flickering. Notice, if I am not running my desktop computer, the room lights does not flicker.
Now the inverter handles all the load I try to throw at it otherwise. Having every light and fan on in the house doesn't challenge the inverter. So it's not an issue of the inverter's power capacity.
Initially I thought the issue is because of inverter. On request to Luminous customer care, they have check by changing motherboard of my Inverter, but the issue still remains same. This says issue is not with inverter.
Then I thought it could be an issue with the electrical socket where I am connecting my desktop computer. So I connected to a different electrical socket, the issue still remains same.
Then to further analyze the issue, I thought their could be some issue with wiring in my house. So I connected my desktop computer at my friend's house who also has Luminous Inverter installed. Surprisingly at his house also the lights started flickering as soon as I connected my desktop computer (just a CPU) and running on inverter.
So now I am thinking there could something wrong to my desktop CPU? I am not sure what to test further or isolate the issue.