Inverter not coping with ps4!

Hi guys.

I fitted my new modified wave converter (2000w)
Sometimes when I start the ps4 up its cuts out?? Voltage is fine. No warning buzz or lights. The fan revs up like its trying to cope then power goes from ps4. It will work sometimes no problem but very annoying when does not.
Do you guys recon I need a pure wave as a better source of power for the console to start up??

Thanks

Don’t know if this is of any use but I was told you need a pure sine wave not a modified sine wave. Don’t know the difference myself but got told this a while ago.