Xantrex PROwatt 1000 SW Inverter

Very slight buzz. Lower frequency than some others which is better. Seems to work perfectly

UPDATE:I've been using used this inverter about 20 weeks per year for 4.5 years without a glitch. It is mostly quiet though once I was running it hard and the fan went to full speed and was a bit noisy. But, it did the job. I was afraid the GFI might give some nuisance tripping but it hasn't yet. It does seem able to sustain 900 watts, and my computer works great on it as does my wife's electric piano (Yamaha P-255 sampling type). The unit will carry about 1300 Watts for some seconds before shutting down on overload (when we forget to set the microwave to low power). Our espresso maker draws 1005 Watts and has never caused a shut down, even when we make four espressos in quick succession.We have a Panasonic inverter microwave. It has 10 power levels. On power level 5 it draws about 700 Watts continuous (does not shift between zero and full power as conventional microwave ovens do). So we set this microwave to level 5 and double the cooking time and thereby have great microwave operation on this inverter.When we do forget to limit the load, say by starting the microwave before shutting down the espresso maker, the unit will shut down and emit a high-pitched sound to tell you this. Even though the unit is in a battery compartment forward and below the 5th wheel bedroom, we can hear this warning. We have the remote stop/start button installed in the hallway to the bedroom where we can shut the inverter down and re-start it when it shuts down on overload. It's been overloaded probably 75 times in 4.5 years with no issues.My only complaint is that the built-in metering works well on voltage but not so well on current/load. It reads zero load up to about 100 Watts and is not at all accurate at higher power loads. This is not an issue for me as I've never felt a need to monitor voltage or power using the built-in metering.BTW, the listing says you don't need to worry about this unit being connected to your battery when not in use because it draws only 0.8 amperes when idle. Mine actually draws about 0.6 amperes at idle. That's good news. The bad news is that even 0.6 amps 12.6 volts is 7 watts. 7 watts is not insignificant unless you have huge batteries. In 24 hours 7 watts is 170 WH, enough to discharge a modest 1300 WH battery 120AH battery in about 7 days. Or, use about 1/7th (about 13%) of your available battery capacity in 24 hours. That's equivalent to a couple of hours of TV watching (smallish TV) with a BD player running. When you are dry camping or boondocking, you want your battery/batteries to last as long as possible and to not discharge them excessively thereby reducing their life or requiring you to run a generator for long hours to re-charge.** Another way to look at it is that it will take a 40 Watt solar panel (about 3 amps) over7 hours to restore the energy used by the inverter over 24 hours.*** Ergo you will definitely want to switch this inverter off when it's not being used. The remote start/stop switch is handy for this if the unit is hidden way in the battery compartment of your RV. So, it's more efficient than many inverters and more efficient than most 2000 Watt inverters, but as with any inverter, needs to be switched off when it's not needed.** In general a generator is only useful to re-charge lead-acid batteries from 50% charge up to about 80% charge. Above 80% charge charging is slower and takes many hours of generator time (6 hours or more) that most people won't tolerate. Only charging to 80% takes life out of a battery. Turn the inverter off whenever possible to reduce generator running time.*** If you take 20 ampere-hours out of a lead-acid battery, you have to put about 40% more than that back in to re-charge it. This inverter taking 0.6 amps for 24 hours will take out 15 ampere-hours. So about 21 ampere-hours of charging is required to cover this discharge. That's a lot of generator time or uses up a good bit of your solar. Bottom line: turn any inverter off when it's not in use.

Had to be replaced.The first one stoped working after 10 minutes. Overheat !!!!I hope the replacement I reliable.I called Xantrex, about this situation, they told me that it should not be use at over 700 watts in the best condition ???????? for it to not overheat.I ask them, why do they advertise them for a continuous use at 900 watts ? They told me, that it is to be use in the BEST condition !!!!!!I replied " would it be in the best condition, if I operated it after installing it, in the FREEZER ? LOL :-)...........Funny guy ?

Suberb!

Update May 2020. I have been using this sucker for 7 years now. The last two years it has been part of my off-grid small solar system. It has run 24/7 for 3 years powering my home office laptops and monitors. It also Powers my router and other small things. The 4 years previous it was part time on and off in my RV. I've just decided to update this review because nothing has gone wrong with this unit. I did mount it on the wall with the fan pointed up so heat naturally rises. Not sure if that extended the life or not but I also take compressed air every 6 months and blow the fan out. I would definitely buy again.I went through 3 of these from other brands.... All were modified sine wave. I will never buy another Inverter that is not pure sine-wave. Things in my RV hummed and made goofy sounds. This is the way you want to go. I have used this for months now. It only runs the fan when you need it and under a small load is silent.Everything runs perfect now and I am 100% happy with the quality and the build of this unit. I think the only thing I would change is I would look for a 1500 watt or higher model of this unit. I sized it properly at the time but I would have liked to run my microwave off this for short duration's but it is too small. I always thought I would just turn on the generator for big loads like that but I am really only using the microwave for short one or two minute bursts. I could have easily run the dang microwave in the RV off battery if I would have known how nice this works. I have 600watt solar system that tops off the battery's so after a big drains it dumps 30 amps back in the battery bank until I am caught up.Can recommend this with no real issues. I don't think this came with cables so check on that. I had cables in place from another unit so I didn't care.