It seems like all these electricians are ignoring the fact that a plug and play solution would be best for the artist who needs a bit of power to run the iron.
Let's just say the iron needs to run for 30 minutes over a 4 hour load shedding block. If we're assuming 250w for 30 minutes, most plug and play devices will do, but it would help if we knew the exact make of the iron that she's using. Some machines have a surge rating (they use a lot of power for a few seconds when starting up) which means you may need to over spec the solution to cater for this.
@LDPP Do you have any idea what the exact machine she is using is? This would help avoid any issues with putting together a solution that isn't strong enough.
the surge idea tends to be on induction devices, normal resitive loads don't behave this way
sure a pc or a other electronic devices use more at startup ie closer to what their label says
and then tone down to a idle use consumption
it is always a good idea to get a bit more than what you need, in case
what you say makes sense and that is why we get the portable power packs that is a plug and play device
they come at a cost though, not all are willing to pay that premium
edit: not an electrician, so just adding my 2 cents, most inverter devices are designed to cater to spikes double its rated output for very short periods of time ie fractions of a second for startup load and some will even handle a bit of overload for a few minutes above rated capacity , refer to its manual
If using an inductive device
It is recommended to gi for pure sine wave devices
Some inductive devices refuse to start up on modified sine wave cheap devices , or so i have heard from others on this forum
Normally inductive devices will run if the modified sine wave inverter can meet that initial demand
The problem is they tend to run hot on those cheaper inverters shortening the devices lifetime
Inductive loads tend to be fridges pool pumps , induction cookers, fans
Ie normally motors but not exclusively devices that uses coils or transformers could too