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

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.

This is a small low voltage inverter/charger that is chock full of features for the price. It works well as a UPS and battery charger as well as being a great 12V Inverter. We use it in a camp bus to run lights, TV, soundbar, Mini Fridges, and a blower fan. It is not to noisy. The terminal connectors for the battery and AC input/output are well sized and secure well. It does what it is advertised to do, and does it well.

This power inverter is exactly what I was looking for. Maybe I could have used a 2k watts but Amazon didn’t have available at the time of my purchase for a reasonable price. Handles power very well as my regular usage loads this equipment within 10-17% of load. Something that brings my attention is that keeps running the fan since I connected and turned on, not sure if this is normal or is a defect so I took a star down due to that. Testing the device didn’t notice any interference on equipments used while power source output was on the inverter this translate into pure sine wave electricity which is what I wanted. I will update in the future I have or found any issue with this unit. Important detail is that I am running this with lithium batteries and the charge is enough for them.

I bought the 1200W unit to use as an emergency power backup for when our house loses power in snowstorms. I primarily have it powering a blower on a gas fireplace and some LED lights, and one standby outlet in case we need to plug in a phone or something. In light of other reviews, the very first thing I did was wire it up and test the AC outlet on it to make sure it was wired properly. It was, so hopefully they've fixed the minor assembly error. While I was at it I tested the rest of the terminals and they all were correct too. As others have said, the unit itself is fairly heavy and the terminal screws are tough to get to when mounted, so best to connect the cables to it first and then mount it where you intend to put it. I made sure to attach it directly to studs, there's no way drywall anchors would safely hold this amount of weight. I paired it with a 100Ah LiFePO4, set the charging voltage to the recommended voltage for the battery, and run it in "AC Priority" mode and it works seamlessly. The display does incorrectly show the battery at "70%" when it switches to DC power, since the battery voltage is ~1V lower under load/rest than it is while charging. But I consider that to be par for the course for these types of things. I let it run my blower and lights for 3 hours and the charge hadn't dropped 1% yet, so it's working fine. The fan does indeed run all the time when the unit is on. I have it mounted in my heated garage with a bunch of other equipment so that's not an issue for me. I experimented with running it in "ECO Mode" but it wants a larger current draw than I'm providing at idle in order for the inverter to run. If you don't draw enough power in ECO Mode, then it cycles on and off in about 4 second intervals looking for a load. That struck me as suboptimal so I'm just going to use it in AC Priority mode like a typical UPS. The manual is a little unclear on this, but the setting for "Battery Charge Current" is settable in 20% intervals up to "100%", with no indication of what that current is. It seems 100% is 15A @ ~14VDC, so it adds about 2A to the 120VAC load it's drawing from the line circuit when it is charging the battery. Take that into account for your AC load capacity feeding the unit. Overall, exactly what I needed and I'm happy with it.

I set this up to run my sump pump when we lose power. So far it has worked flawlessly. It switches over to battery power practically instantly when we lose power. I have it connected to a 100 amp/hr battery and also have powered my refrigerator during two recent power outages, with no issues. Much easier than dragging out the generator into the yard and running extension cords into the house. Keeps the battery charged and ready for use. No issues with connecting battery and charging function. Be warned that the cooling fan runs all the time so make sure you have this mounted behind closed doors or somewhere the humming won't bother you.

With this inverter you basically get inverter, auto transfer switch and battery charger all in one, which is pretty good deal for 1200w of power. On idle it draws 12+ watts (from battery and AC outlet). While charging my 12v 100Ah LiPo battery (with BMS) was consuming 250W, not sure if this is the max the inverter can supply or if it is the limitation of my BMS. I've tested "power outage" with my internet modem plugged into the inverter, and it stayed on in both cases AC to battery and battery to AC switching. I don't have the tools to measure switching speed to confirm it is indeed 5ms. My biggest complain about the inverter is the fan, which never stops spinning even on idle. It is not a problem if the inverter is enclosed somewhere, but if it is nearby you can definitely hear it (think loud PC fan noise). Overall this is great inverter and I highly recommend it.

14 MARCH 2026 I am updating this review to report a major flaw in the charging logic of this unit that resulted in the destruction of my battery bank. The Problem: Constant High Voltage The "SLA" (Sealed Lead Acid) setting on this unit is incorrectly programmed for long-term maintenance. While the unit’s display reported a "97% Charge" and indicated a stable status, it was actually maintaining a constant 14.4V. It never dropped to a safe float voltage of 13.2V–13.8V. The Discovery: I discovered this by accident when the unit was unplugged and forced to run on battery power for a period of time. The unit alarmed at 10.5V. Up until that moment, the display had reported the bank was healthy. Because the unit indicated it was in a maintenance state, and the environment was climate-controlled, there was no reason to suspect the unit was actively overcharging the batteries. Physical Damage: Upon inspection, I found the roughly 20kWh bank (sixteen Interstate SRM31 batteries) had been "cooked" by the constant 14.4V charge over the last three years. Each battery required between 1.6 and 2.2 Liters of distilled water to refill. The electrolyte is murky with debris shed from the plates. The plates are physically compromised and the bank can no longer hold a charge reliably. Many had shorts already after the first test sequence. Owner Advisory: The hardware itself is durable, but the charging presets are a liability. If you use this for a lead-acid bank, do not use the SLA preset. You must use the AGM or Manual configuration to ensure the unit actually drops to a float voltage below 13.8V. Original Review: 2 Years of Continuous Use And Still Working! (1200 Watt Version.) I am using two 1200 watt versions. They have been hooked up continuously for two years now charging two separate 8-battery banks comprised of 12V deep cycle SLA 97 AH marine batteries that were all purchased at the same time. I did this setup to have backup power that could be charged and maintained via a/c power and act as a backup for key systems. It does so by immediately switching to battery power when wall power goes out. When there is power from the wall the unit output functions as a pass-through for that power while also keeping the batteries charged or recharging. It has worked so well that I am buying their solar chargers too. So, here is my setup and what you might want to know: 1. There is a setting in the instructions on how to set up for Standard Lead Acid Batteries. After doing some research I decided to pair 8 deep cycle 97 Amp Hour 12 Volt Marine batteries with each unit. You have to set the the charge current at 80% from what I recall but I cannot find the settings right now to verify. This setting matched the charging current to the battery bank size and type. You just hook them up in parallel. I also purchased short and thick gauge connectors from Interstate Battery. After that you hook the positive lead from the charger to one side of the bank on the positive terminal and the negative end to the other end of the bank on the negative terminal. This will keep all batterie in an even state of charge. 2. It costs around $8/month to keep the batteries topped off at around $0.14/kwh. 3. When the power goes out this thing does not miss a beat. You cannot even tell. No blips no nothing. I have security cameras, deep freezers and incubators plugged in and they just keep running as if nothing happened. 4. Two year old SLA Deep Cycle batteries are at 97% charge state according to the display. 5. The only bad part is the relatively loud fan. I have my banks in two parts of the house so hear them a lot. The good news is they run slower most of the time. There seems to be different speeds. After a while the noise drones in the background and is only noticed when the speed changes. 6. You will need to buy a three-pronged plug and wire to get power from the wall to the unit. I checked the configuration beforehand and found that it was fine and not reversed as some people reported with the 800W version. That was just not the case with the 1200W units.

Test of 1200 watt Ampinvt low frequency inverter supplied by Dumfume 100 AHr lifepo4 bubattery operating 8000 BTU Midea inverter window air conditioner. Inverter Load is 35%. Inverter is $165, battery is $150. AC uses 435 Watts at 107 volts. 4.8 amps. This is just a trial for an installation into a cabin bedroom. I have a 3 kw and 5 kw inverters of same brand which easily run the airconditioner. Just FYI if you want to set up a least expensive power option. 👍🏻

Funciona excelente. Esta conectado a un refrigerador y una TV

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