Generator Frequency Fluctuations - Whats safe?

Palaeoboy

On the GMC you can use anything which isn't voltage and frequency sensitive.
ie, Globes, conventional, battery charger, kettle (if wattage large enough), fan heater too, possibly, but it may not like 60 "HURTS".
Anything designed to run on 240 v ac which has a voltage sensitive power conversion or switching can only be use on the Honda with safety for the appliance.

Laptop supplies, these are switch mode types and only a few will run on other than full 50 HZ sine wave, most like the sine wave and possibly will not start and become stalled and may burn out or blow their internal fuse if connected to a varying voltage, off frequency wave form..

Switch mode battery chargers, usually multi stage units also like 50 hz full sine wave.

If a switch mode device does happen to start and run, on something other than clean power, it usually cannot switch properly and the poor waveform can cause the unit to run hotter than normal because it can't make proper use of the shape of the energy being fed into it.

If the GMC happens to run at 50 hertz and 240 v while under load, then nearly everything should be ok, it is just when these two are not held constant the delicate stuff may not like it. No good if it is an expensive device.

Ross M

I no technician, but am interested under what sort of load types you tested both ? I had the thought that maybe the Honda might produce those figures consistently across a range of appliance types and load levels, while the GMC might drop it's bundle when trying to do the same ? I've got a 1k Yamaha with much the same specs as your Honda.

You will also find that most things these days are rated at 50/60hz.

Just remember with a generator, it can only put out what the prime mover can put in.
I could put a 10kva generator on the end of a 150cc motor. It will still only put out approx 2kva, actually it will probably put out less because of the extra weight of the 10kva rotor.
Power out = power in - losses