Does Anybody??

Watts will vary between printers. With a good solar system and using the printer before noon it should work just fine. 60 to 100 watts average IMO. Full 200 amp hour Lithium batteries, usable 2200-2300 watts.

I just looked it up and they say about 50-125 watts depending on the size of the printer.

Add the total power required (printer, computer, etc), divide by 12.4V, multiply by the number of hours and you have the total Ah required for a project. I'd add 10% for inverter losses. Compare to the battery Ah capacity.

Of course all of other house loads and any charging have to also be considered but at least you will have a ball park estimate of the additional project load.

Example: 200W for 2 hours. 200W/12.4V*2 hours*1.1 (10% loss) = 36Ah for the project.

Update: Lithium battery voltage is a little higher, add additional power for the computer prior to starting printing but we're getting into the noise level.

Seems like I will be able to do this, especially since I want a small one.....now the BIG question is.......which one!

I'm interested in one, I'll ask the grandkids. :B

Ender3v2 uses about 240w on warm up (10 minutes or so). and average about 135 watts at 120v.

most small prints average 2-4 hours. my average print is 6 to 13, but it completely depends on a variety of factors beside size (z layer, infill) etc.

what are you trying to print?

I got a small (140x140x140mm) Filiment printer (note there are two types of printers and several sub types.. This is one type) 65 watts (Flashforge Finder Lite) it's printing as I type.. You lose power the print needs to be re-started.
The one I have connects to the computer via SD card (Included with the printer) so you do not tie up a computer and add it's power load to the print.. Some connect via Wi-Fi,some by USB drive, some by other means some need the computer live to "Serve" the file. Mine does not.

Filiment printers do not turn out the very best quality print and have serious issues with some complex designs.. but are still a lot of fun and useful as well. I've printed some replacement parts.. Some tools (Printing a tool just now) Some Political Statements (no further comment) some 3-d Signs including
Not in Jail, NOt in a Mental hospital, Not in a Grave - I'd say I'm having avery good day (Note glittery sliver on purple not the best contrast but I had to try it) Just for fun I printed a musical instrument (Soprano Recorder) The young lady playing it seems to like it per her mother (I still am not sure how good the sound is..Got to ask the young lady, not her mother). An Alto (Longer won't fit my printer.

The other type of printer is Resin...NOW this produces a much higher quality print but.
1 The resin is a "Haz-mat" material before printing... With this type of printer you need to put it under a vent hood (Not something I can do here) and you fill a tank with the resin.. To print a light source moves up through the liquid. the lights (LED's? I do not know) "Set" the resin. very fine detail is possible here.

Once the print is done you lift it out (Glove up first) and transfer to a wash tank.. Was and rinse (The wash and rinse are also haz-mat and must be properly stored and disposed of) I don't think I'll be getting one of those.

Multi Color prints are possible

We do not print in our RV but we do print at home.

My Prusa i3-MK2 has a E3D-6v 40W hotend, 120W heated build plate and a low current 'Silent Mode'.

If I'm printing PLA or PETG and not needing to heat the plate, it uses ~60W.

If I'm printing ABS at 250C with a 90C plate temp it will use ~170W to heat up and then ~120W on average to print.

You can place the printer in an enclosure to retain the heat and the build plate heater, which is the power hog, will not turn on so often to maintain temp.

By the way the sign I posted above (Bigger Hamer) you can download the STL file from Thing I Verse dot com.