Upgrading power system 220v consideration.

[Tigerstripe40]

Currently, my solar system on my overland rig (2008 Tacoma) is 165watt (rated, actual output is about 123 watt at my latitude).
Running into a tired 110ah SLA battery. Currently, I am running a MorningStar PWM controller.
I run a 40qt ARB refrigerator continually, and initially I had enough reserve to be able to also run a 26qt Colman Stirling Engine fridge in freezer2 mode (good enough to keep ice cream and other frozen foods frozen). The battery is about 8 years old, panels and controller 16 years or so. The solar power system is completely separate from the trucks stock electrical system and I have done that on purpose so as not to have any parasitic power that could potentially drain the starting battery.
For cooking I run propane.

I am considering a significant upgrade to the system.
300watt solar panel.
300ah LiFePo4 battery.
3000 watt inverter.
40amp DC-DC charger (this is something I am hesitant on as, again, I want to keep the trucks power system completely separate from the aux power system.

I do plan to run an induction cook top.
Electrical instant water heater 'tea pot'.
Amateur radio.
120v eMTB battery charger (these draw 4 amps).
12v gasoline heater (same thing as a diesel heater, but running gasoline so I don't have to carry 2-3 separate fuels).
Same fridge/freezer.

I know that a 3kw inverter will be more than adequate to run all of this. However, I am also strongly considering having the ability to run a 220v welding power source, specifically a 200amp capable IGBT AC/DC TIG welder (this can also stick weld).
The things I'd be considering welding would be to repari a torn axle housing. Repair alloy motorcycle crank cases, that sort of thing. The TIG machine CAN be run on 110v for thinner stuff.

I suppose what I am getting at is, would it be worth getting a 220v capable inverter to be able to run the TIG power source at full tilt?

 

[e9999]

I have not done that, but I imagine a welder running at 200A may need something close to 8000W, maybe even 10,000W, so to do that with a battery system you may need up to several hundreds of amps on that side, depending on configuration, which in turn will probably require large wires; likely several batteries -especially if lithium because they are typically limited in current by their BMS-, and a pretty hefty inverter that can handle either the high power and the higher voltage you may want to use if you put the batteries in series to limit current, or high power and very high current if in parallel. And then unfortunately the big inverter may not be very efficient if you use it at low power for more mundane tasks, which may or may not be an issue depending on how much extra energy capacity you have.

IOW, I would think about this carefully and run numbers before I'd go out and buy an inverter, as the rest of the system may also have to be designed specifically for the welder job.

 

[Tigerstripe40]

At full chooch the TIG welder pulls 3600 watts. I doubt I'd every be pulling that much power.
But honestly for the amount of times I'd ever actually need a welder, there's other solutions.

 

[e9999]

much less than I thought, easier then.