[Barrykgerdes]

The wave form from the cheap alternator type AC 230 v generators is reasonable. They are regulated in speed to keep the frequency at 50 Hz. If you use this to the drive a lower voltage power supply to get your 12 volts there should not be any problems. Their big drawback is the audio noise level (100 db+).

The more expensive (quiet less than 60db)) generators run at higher speed and convert the AC to DC which is then used to drive an inverter to supply 230 v AC at 50 Hz. This type of supply is subject to electrical noise but the supply is normally well filtered before being available for use. The one I use cost $600, has remote electric stop/start.

The main thing to remember if you want to avoid spikes is to start the generator before you connect it to your equipment and turn on and don't let it run out of gas or stall while connected to your equipment. ie turn of your equipment before you stop the generator.

I use a quiet 2.5 KVA generator in the field all the time. It also sits in a soundproof shelter. It runs a TV, PC, 4 laptops, Telescope, CCDs and a full imaging set up. Powers the caravan (does groan a bit when I turn on the toaster with a heavy load) but does not affect the imaging. During the day when the cameras are not working It drives power tools. drill, grinder, chainsaw etc (not quite enough power for the welder)

Barry

PS when you look at the cost of Deep cycle storage batteries and a cheap generator for charging $600 for a generator doesn't look too bad.