You're house inverter is how big? I suspect it won't be big enough for an inverter welder which is itself an inverter. As you say, the harmonics between the two might be horrendous.I think it will depend on the quality of your genny & welder chosen.
Some inverter welders dont like smaller less stable generators.
I have just gone from a transformer mig to a cheap inverter 3in1 welder.
I could use the old mig on the house inverters up to 3 pin plug levels. After that either the 11kva genny or 15kva+ PTO genny.
Both would take it to the max 210amps.
Now the new inverter 3in1 wont run at all on the house inverters capable of 10kva but runs ok on the 11kva genny at the 110 amps I have used it at so far.
The house inverters shut down with an over voltage on the output I am guessing due to the welders dirty harmonics back feeding.
That's a steal if it's fully working. Even if it needed a bit of work it's still cheap as - even if it's old (I think the older Perkins are superior to the later 1100 series by a distance)Second time I've posted this, what I think is a bargain.
70KVA GENERATOR PERKINS ENGINE | Home and Workshop Machinery
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You're house inverter is how big? I suspect it won't be big enough for an inverter welder which is itself an inverter. As you say, the harmonics between the two might be horrendous.
I suspect that to be on the safe side, your source inverter (like is a good base fir a genny running an jnverter/switch mode PS load) to be 2x the output of the load.
If your genny is minimum 2x (3x even better, or a 15kva 3ph unit configured for 1-phase) the peak demand if the welder, AND is a decent quality alternator that is a proper industrial 4-pole, 1500rpm unit with plenty of mass - then I'd have expected it to have a very good chance of working.
It might be worth trying a feed directly off your generator to the welder - bypass the house inverter system altogether.
(As an aside - I had a multi-purpose Inverter Paton PSI160 Inverter-Welder - and it made the lights in my house on mains - flicker. My 180A Oxford Transformer Welder has no effect whatsoever).
The 1100s are fine mechanically, I look after a few at 13,000hours but the electronics can let them down.That's a steal if it's fully working. Even if it needed a bit of work it's still cheap as - even if it's old (I think the older Perkins are superior to the later 1100 series by a distance)
The welder shouldn't be overly frequency sensitive - but might be a bit fussy over voltage.House inverter is 10kva supplied from about 2000ah 48v bats.
It could have run the 210amp transformer welder flat out if I had a suitable 32amp socket.
We have had harmonics issue with posh hair straighteners before & thats about 1-200 watts.
The inverter welder running at 110amps should be about 3kw after efficiency is allowed for.
Both generators are 1500 rpm units. The PTO has old style voltage control & the other one AVR.
Doing big welds we do run direct of the genny or PTO unit.
However our inverters can do genny support while doing pass through so in theory we are good for about 20kva.
Thinking back when I tried the new inverter welder the genny was on at the time & we were plugged into the house. So I might try it with the genny off & just the inverter supplying it.
Would be good to be able to run just of the inverter if possible for the thin stuff.
As can the electric fuel filter priming heads, and some had I think water pump issues.The 1100s are fine mechanically, I look after a few at 13,000hours but the electronics can let them down.
I am offgrid and all 240 / 110 v power is from a generator, I want to run TIG as I mostly weld thin stuff now, what are my options?
will welder generators run TIG or should I go for a generator and an inverter TIG ?
Its fine on the genny.The welder shouldn't be overly frequency sensitive - but might be a bit fussy over voltage.
On your AVR unit, you could also try adjusting the voltage and voltage stability a bit with the potentiometers.
Another thing worth a go.... would be to try he welder off the AVR genny.... with some resistive load also applied (such as a small electric heater). The resistive load can add a smoothing effect and damp out harmonics that might be causing the AVR to output anomalous voltage - and might help things work.
Do you know what the second adjustment screw on an AVR does?The welder shouldn't be overly frequency sensitive - but might be a bit fussy over voltage.
On your AVR unit, you could also try adjusting the voltage and voltage stability a bit with the potentiometers.
Another thing worth a go.... would be to try he welder off the AVR genny.... with some resistive load also applied (such as a small electric heater). The resistive load can add a smoothing effect and damp out harmonics that might be causing the AVR to output anomalous voltage - and might help things work.
Almost certainly it's voltage stability. Usually clockwise for more stable, anti-clockwise for less.Do you know what the second adjustment screw on an AVR does?
I know one screw on mine is voltage, the other ?
Is this adjustment on or off load ?Almost certainly it's voltage stability. Usually clockwise for more stable, anti-clockwise for less.
Generally you connect a multi-meter and turn Anti till you have instability, then turn it up just enough to get it stable (you don't want the voltage damped too much, or the system won't react quickly to load changes. However, it might be worth trying to turn it up to see us you can help stabilise the output on your welder. Make a note of wherein the dial range it is before you twiddle - so you can put it back there if you get into a pickle).
You set up offload generally. If it alters in voltage or stability once on-load, then either it tends to be a load the machine cannot cope with (like one with a lot of harmonic distortion), or because the Regulator is faulty.Is this adjustment on or off load ?