sine wave

Hello, I've got a 850W PSU with 3070ti and intel 10400 with 2 1440p monitors (144HZ and 60HZ). My flat is a traditional 3 BHK. Now, I already have Luminous 1050 + 150Ah battery and it works flawlessly. I can use my PC on it without any issue. But recently I got a 55" TV and it can't handle both...

I read the sticky thread from 2016 about how PFCs in power supplies can be incompatible with APC's regular range (which are Rs. 10k, 15k types). APC also has confirmed the same. However, there seems to be varying opinions on what is ideal. Spending 40-50k on UPS is not ideal. :) PFC is good for...