Top critical review
It's rated at 115 volts, but only puts out 88.5 volts
Reviewed in the United States on October 10, 2018
I bought this for my father-in-law as a gift since I already have one of these. When he set it up in his car, he noticed that his laptop wasn't charging. The green light on his laptop's AC power adapter didn't even turn on. Since I have a voltmeter, I figured that I'd measure the output voltage. Although the inverter is rated at 115 volts, my father-in-law's inverter was only putting out 88.5 volts. I then measured the voltage on the inverter that I already had and I got 104 volts. That's still not at the level that it was rated for, but it's at least enough to charge a laptop (a laptop's AC adapter typically needs at least 100 volts). That's why I never noticed that my inverter wasn't up-to-par, it was already able to charge my laptop; so I never bothered to measure it.
So then I attempted to get a warranty replacement for his so that I could at least get one that put out 100 volts, even though that's still lower than what it's rated for. They recommended instead that I use a different voltmeter (a $150 Fluke 17B) since they didn't think that my meter (a $315 Fluke 77, as shown in the photo) was accurate. I told them that I'm a licensed electrician and I carry calibrated meters--not to mention that the voltmeter I already have is more expensive. A device that's listed as a voltmeter and is properly calibrated is going to measure the same voltage as another one like that--especially if it's the same brand. They still pushed the idea of using that Fluke 17B or return it back to Amazon. As a person who works in the critical power industry, having a product rated at 115 volts but only putting out 88.5 volts is unacceptable. But as a person who just wanted my father-in-law to be able to charge devices in his car, this was a definite rip-off.