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I received the Xantrex Technologies 851-0400 APower Plus 400-Watt Inverter unit on time. A great unit for the price. It has been working great.
Many of the current crop of these inverters have 60 +/-4 Hz which is 60 Hz +/- 7%. I suppose the reason for this change in specs is that these manufacturers are now cost cutting to the extent of eliminating a 30 cent quartz crystal. I didn't test to see if the frequency changed with temperature, input voltage, load, or other other factors. Several of the Xantrex inverters including this one have much looser frequency specs compared to the last generation of inverters which were typically 60 Hz +/- 0.01%. To be fair, I've noticed a number of inverters made by other companies also have relaxed this spec. The frequency variation is most likely to cause problems (speed changes and overheating) in devices with AC motors, but it will also cause inaccuracies in devices that use the AC line frequency for timing purposes. I measured the output frequency of several models and found their outputs to range from 58 Hz to 64 Hz.
HAve no problems with this, 2 outlets comes in handy when someone MUST charge their phone while you are using power for something else.
Purchased unit with intend of running a portable DVD player for the kids, and a peaceful trip for me. Take my warning DO NOT BUY this piece of junk, you'll feel better giving a homeless person $32.19 instead of dealing with disappointed kids. Instead I got the opposite, as soon as I plugged the unit into Power Port I blew two 20 AMP fuses (on 2004 F-150) so I did the dumbest thing I wired it to the battery and short the battery out. So I'm out a battery and inverter at this point.
Working as it should. Bought it to use in our camper on a 9 inch TV that has a TV box hooked up to it. So far so good. Doesn't make noise, takes up minimal space and the picture is great. Thanks We haven't had the occasion to hook two things in to it yet but so far so good.
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