Power supply

hetoc

Before ordering I want to ask few questions due to I want to create portable travel wifi/4g router with ssd as a simple nas storage

1. Can this board be powered via PoE, Li-Ion, usb charger combo?
2. what is ssd nvme speed?
3. is there any way to add second wifi module not via usb?
4. is there any way to add 4g lte module?

vga84

1. Can this board be powered via PoE, Li-Ion, usb charger combo?

You can certainly assemble a battery pack out of several Li-Ion batteries, solder the BMS board to them + a voltage converter and solder all this to the 12v input power rail add a switch and run this thing on batteries. But if you have never done something like this, it might be not an easy task for you. As for PoE - there's no PoE in the specs of this board. USB charger - you need 12V to power this thing.

what is ssd nvme speed?

I have not measured it yet but It's going to be way more than you can push through  Ethernet/WiFi, this is for sure So for nas it's going to be OK

3. is there any way to add second wifi module not via usb?

On the pins of this board  there are hidden USB2.0 ports. You can disassemble any USB2.0 wifi dongle and solder it to one of this hidden USB ports on the pins. And you are will need to get the drivers for this dongle working on the board. This way you can get an extra permanent WiFi without plugging a device into USB ports. Again this might not simple for you if you have never done this kind of thing. Soldering, pinouts etc

4. is there any way to add 4g lte module?

There's an offiial LTE module for this board. Looks like it can be plugged into USB or PCIe. So this one is going to be simple.

Honestly, given your requirements you are going to be better off with raspberry pi. It would be much more simple to get it working.....