Ampinvt 1200W Pure Sine Wave Inverter with AC Charger, DC 12V to AC 120V Output,UPS Backup Power Low Frequency Inverter for Lithium, Sealed,AGM, Gel,and Flooded Batteries

Funciona excelente. Esta conectado a un refrigerador y una TV

I purchased this to upgrade the modified sine wave inverter/charger in my RV. Its power output was a bit higher than my current system, it can be set for LiFePO4 batteries, and of course it provides a pure sine wave output (did you know that a "modified sine wave" will destroy the speed controller in a KitchenAid mixer? Well, now you do...). Unfortunately, it is not a good fit for this application, because the maximum battery charging current (the "converter function" in RV parlance) is only 15 amps. This means that after boondocking for a couple of days, or even while plugged in at an RV park, the house batteries will take a long time to fully recharge, and if there's much load in the coach, they'll never recharge and could likely discharge further. For this usage, the charger/converter really needs to be able to source well over 30 amps - 50 amps is way better. For a stationary UPS setup though, this unit is fine. The recharge rate is not so critical in this application, because the batteries aren't supplying the load while on city power. Also, the changeover from city to UPS power is extremely quick - less than a single cycle (17 msec). There's no drop-out at all during switch-over, just a bit of a glitch in the waveform. The fan does run at slow speed all the time, and it's not silent, but that's not a problem for me because it's installed in an equipment room with lots of other fans running too. I haven't run the unit at full load, so I don't know if complaints in some other reviews about not achieving full rated power are valid. It would be easily possible for some of those issues to be caused by drooping incoming 12-volt power (loose connections, too-small wire, or inadequate/discharged batteries). In my (new, re-purposed) application of an electronic equipment room backup, when paired with a 300 Ah LiFePO4 battery, it works great. A couple of other reasons the unit was able to hold onto its five-star rating: The display shows genuinely useful information - AC input voltage, battery voltage, load current. It also makes a guess about the battery state-of-charge, but it's usually wrong... It's also quite efficient. Its power draw in inverter mode when completely unloaded is well under an amp, which is certainly OK for sine wave inverters. (I have another one that draws 3 amps - 36 watts - continuously, even with no load.) Of that idle current draw, I bet at least half goes to keeping the fan running, which could have been optimized. The unit has another mode in which it powers up briefly every 10 seconds to see if there's an AC load, and if not, powers back down to very low draw. This could be useful in some applications where the load is constant when switched on, but may be off for prolonged periods (like a sump pump), and would wring a much longer life out of the backup battery bank. However, for more general ad-hoc applications, such as a cabin backup, the regular "AC-priority" mode, or possibly the "unattended mode", would be better. The "unattended mode" acts just like AC priority mode in that city grid power is used if available, or inverter power if not. In this mode, however, if the batteries get too low it goes to a very low power mode, then returns to inverter mode when the batteries are recharged some (via solar, for example). Just about perfect for a remote cabin with flakey city power and some solar panels. The unit appears to be conservatively designed and well built, and well laid out for convenient wall installation. There's an RS-485 port that should be useful, but I was unable to get any information about its communication protocol, so ... not so useful after all. All told, I'm quite happy with the unit in its UPS application, and I may end up moving it to a little cabin/pub I'm building in a remote corner of my property... ;-)

Living in Ecuador where we are experiencing an energy crisis, there are days that we lose power for as long as 14 hours. I need(ed) power for my critical items, CPAP, router and computer (since I work on-line.) I shopped around looking for a unit that would have a built in battery charger and an ATS to automatically switch back and forth between normal and emergency power. It also needed to generate a Pure Sine Wave due to my CPAP (that's what many CPAPs require). I decided to roll the dice and purchase an Impinvt 1,200 watt inverter. I "was" a Tripp-lite guy, but the models I saw were far too pricey and I didn't see evidence that they generated Pure Sine Wave. My biggest challenge was finding deep cycle batteries. Prices for anything of an electrical/electronic nature have skyrocketed due the current situation. Once I completed my installation I discovered that it has enough output to also keep my refrigerator going which is a true god-send. The last thing we need is to get sick due to food not being kept at proper temps. The installation was very easy. Due to having worked with inverters, generators, ATSs and more, it was a no brainer. My batteries are ideal for the situation (better be for what I paid for them), so thus far we have more than enough juice for our needs. While powering our frig, my CPAP, several LED lights, 2 UPSs (which multiple chargers plugged into them) - my inverter panel shows a 5-8% load. If I am interpreting that correctly; it is indicating that I have only scratched the surface and my unit is capable of powering up many more items. So far it has worked flawlessly. Besides being able to work when others cannot, there's the wife situation. Happy wife, happy life. Having provided for our energy needs has made my wife more tolerant of her good looking but annoying husband. So...thank you Impinvt! If anything changes, I'll share that too.

es excelente para respaldo de energía, no recomiendo aire acondicionado debido a que no esta diseñado para algo con picos tan variantes, alimentamos equipos de redes y hasta ahora un excelente desempeño

hay fallas incluso con poca carga es in inverter caro y de baja calidad