hmmm. Will check the specs on what I have. No longer have a scope to actually LOOK at the output. Last scope I connected was over 25 years ago ;-)
I have a couple like this: http://www.amazon.com/Whistler-Pro-2500W-Watt-Power-Inverter/dp/B003R7LQDI/ref=sr_1_1?ie=UTF8&qid=1404394259&sr=8-1&keywords=2500+inverter
I started my technical career using Tectronix 555 scopes. Used to turn them on first thing in the morning to warm up the lab.