hello everybody...i need big help...i have to many clients and i dont wanna dissapoint them again...i have the worst inverter of the world chineese...i need your suggestion to buy a new one...tripp lite 750 watt 12 volt ? i need also a power regulator ....please suggest with pictures your best please

Finally im using tripp lite 12 v , 750 w !!!! Mikrotik works fine with this inverter !

Is all of your equipment DC or combination of DC + AC ?, can you specify what voltage (s) are required.

Finally im using tripp lite 12 v , 750 w !!!! Mikrotik works fine with this inverter !

Well, it depends first of all where are you located, on what you can put your hands on.
A tripplite 12V and 750W sounds to big for me, for just a router (max power 16W).