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

Update: My mistake from the previous update. There was a loose connection making it appear that the inverter was drawing too much current from the batteries. After solving the connection problem, the inverter is working perfectly as it has been for months. As long as you do not pull above 800 watts despite its 1200 watt rating, it should work well for any PV system. Update: This inverter must have a no load power draw of from 70-100 watts, a level that is unacceptable. My new LiFePo4 batteries will rest at 26.5 volts for my 24 volt system until I turn on this inverter. Suddenly the batteries dive to 24.7 volts just from the inverter with no load. I adjusted the settings with no luck. The fan runs all the time even with no load. Eco more is useless because it cycles power on and off ever few seconds. This inverter has serious design flaws unfortunately. The only good aspect is that it can handle 29.2 volts when charging. Original review: I have only run it for 24 hours. Reliability will only reveal itself after two years of use, but it has produced clean power with very low fan noise. I will be ordering another one as back-up. Of the many inverters I have purchased over the years, this one appears to be both the highest quality one, with the best features, at the best value. Most other inverters will shut down once the batteries exceed 28-29 volts. This one will stay on at 30 volts, more than sufficient to handle intense sunny days when batteries can hit 29 volts.

This review is for the HT-80112, the 800 Watt unit. I received it Oct 19, 2022 and was pleased to find that cables were included with the unit. I cut the positive cable and attached crimp lugs to each cut end, and inserted a 175 Amp fuse from O'Reilly's. I also checked the output connector that I expected to be miswired after reading the other reviews. Mine is wired correctly. I initially found the menus a bit funky, but they actually work fine once you get the feel for them. I set my unit up for AGM, 20% charge rate, unattended mode with dropout at 11.5 V and restore at 12.5 V. I hoped to find that with input power disconnected the inverter would operate until the battery voltage dropped to 11.5 V, at which time the unit would wait for utility power to be restored. Note that as shipped, the dropout voltage is set for 10 volts. I tested the unit with my router, the fiberoptic internet interface, a security system, a microprocessor, and a 75 Watt incandescent bulb for loads. I used the old battery I took out of my pickup, so it only ran a couple of hours, but it worked exactly as desired. When I restored power the battery started charging and completed charge normally. Initial charge rate was around 13 Amps. I've pulled power several times and all the equipment stays online. This unit does exactly what I need and has an excellent price. All the connectors are quality and well placed. My one criticism is that the marketing is inadequate. It was unclear to me when I ordered the unit that I could set the dropout voltage, which is critical for unattended operation. I emailed the manufacturer twice before I received the unit and received responses each time within 24 hours. I tried unsuccessfully to find a manual for the unit on their website, but was sent one by the manufacturer. The FT series has manuals available for download, but it seems the website hasn't been finished for the HT series yet. I next bought the UB121000 100AH battery from Amazon. I ended up setting the dropout voltage for 12.0 volts and using the Lithium Ion/Customize menu set the float voltage to 13.6 volts. The only time my battery will be under load is if the power goes off, and all I really need is either to ride through a power glitch, or have a clean shutdown and a clean startup when the utility power comes back online. I've attached photos of my inverter waveforms with my 35 Watt load attached. The inverter isn't quite as pure as utility power, but it isn't bad. One photo shows the transition from utility power to inverter, and the other shows the transition from inverter to utility. Inverter to utility looked identical in various captures. I only did the one capture of utility to inverter, which happened when I pulled the wall plug to the inverter. One nice thing is when you restore utility power the inverter waits a couple of seconds before it switches back to utility power, so the glitch you sometimes see when utility power is coming back online is masked. I initially thought I might use the unit to equalize an older flooded cell battery, so I set the float voltage to 15.5V. I never got a straight answer out of their tech support as to what the unit is actually capable of, but it isn't 15.5 Volts, even though you can set it in the menu. I did see it maintain 14.7. The specs in the manual show DC input voltage: 10.5 to 15 volts. I discharged my UB121000 battery for 15 hours for a total of about 42 Amp Hours to around 12.23 volts. It was mostly recharged in about three hours, but I was still seeing around 100mA of charge current 24 hours later. This unit has all the features I need and works great. I couldn't be happier with it. Oct 31, 2022

The Ampinvt 800 W pure sine inverter arrived days ahead of schedule and in seemingly perfect order. The model number is HT-80112. It came with battery cables, a pleasant surprise. It also came with a US-style IEC appliance cord, a more puzzling surprise. True to other reports, the hot and neutral are swapped on the internal receptable, which otherwise works fine. It's easy to use the terminal block to bypass the faulty outlet. The cooling fan is on all the time, but at a fairly low speed when the unit is just charging the battery and passing AC straight through. The idling power draw in AC priority mode came out to about 15 watts. Placed in ECO mode it couldn't start up fast enough to keep a Raspberry Pi 4 computer running when the AC was disconnected. In normal AC priority mode UPS operation seems perfect. It's able to start a refrigerator with a 7.1 amp nameplate current draw with three beeps worth of overload warning. It settled down to about 13% load. No odd noises or other trouble signs. A Raspberry Pi4 and monitor powered at the same time wasn't detectably perturbed. A few experiments with an adjustable 1500 watt heat gun revealed that near 50% load the battery cables started to get hot. No damage, but a fair warning. On balance it seems a nice unit. If it lasts it'll be a good buy. [update 20240414] When I purchased the second unit it displayed faulty behavior of the charge indicator LED, continuing to flash even after the battery was fully charged. My complaints to tech support were met by evasive and distracting replies that made pointless requests and served only to delay progress. Eventually I gave up, since the crazy LED seemed harmless and the inverter worked ok otherwise. Now the charging LED has simply gone off and stayed off. The device still seems to work. Because of the very low price the inverter remains worth trying, but I'd urge purchasers to immediately test thoroughly any unit received and return it without hesitation for a refund in the first 30 days. Don't wait for tech support! [added March 2, 2025] The second (faulty) inverter continued to operate even with the non-functional charging LED, which simply remained off even when charging the battery. However, the fact that the overload beeper occasionally sounded three beeps suggested the inverter was slightly undersized for the job. A 1200 watt version of the same inverter seems to work a bit better. It sometimes beeps once on compressor startup, but not more. No other problems so far. it came with 16 square millimeter battery cables, versus the 10 mm square cables of the 800 watt version, and no IEC cord, which was useless anyway. bob prohaska

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.

Received this 800w/12v Charger / Inverter, it was well packaged, came with 2x10 mm cables. It requires a battery connection in order to turn on, so you cannot just wire it into AC power by itself. Setup through the menus was pretty straightforward and I was able to set up my lifepo4 battery with a charge rate of 14.6v as custom/lion setup, and disable the annoying beeping. Max charge rate is around 15A (~220w measured) and standby consumption of this all in one is 9.5w. Testing a cut from AC, I have no interruption to consuming devices. I don't have tooling to test sine wave output tho. Low noise, with consistent airflow, fan runs 100% even when not under load, an improvement could be lower fan curve when not under load or low temperature. Lastly, I checked if there was any wiring issue and found none for the AC output, as shown in the photo, correctly wired as per indicator. Would have been great to see usage in watts vs load % on this unit. I tested burst of 1600w using a heat gun and saw the fault indicator light up with load shooting over 150%

Well it was good while it lasted, the unit now beeps non stop, it does not display any fault and still work. But it won’t stop beeping. Save yourself and get something else. Had been trouble free but now I’m gonna have to fiddle with it. The price was very reasonable. I’ve had the unit installed for a month or so and it works great. Had a couple of planned power outages for substation repairs and this unit preformed great. I hard wired my own outlet. My only complaints are how the plastic shield for hard wiring is made. It’s kinda a pain to have 3 separate small holes for wire pass through instead on one for the bundle. My guess it to help prevent improper wire installation from shorting but I just about removed the guard instead of fiddling with it. My second complaint is the unit will not start if a charged battery is connected with out power from the grid. It must have grid power and battery power when the grid goes off line. Not a huge deal but definitely adds extra steps if the power is out long enough where the battery dies one cannot simply put jumper cables to the battery from a running car and get the system to restart, you must provide generator power or something to the 120v plug to restart it. Anyway enough complaining, I would definitely buy again as having this in allows me to not have to go out and start the generator to get my phones and communications back online as my starlink is the only service that works in this remote area. Once installed it’s all automatic which is great.

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.

Excellent equipment, very pleased with the performance and robustness of the equipment.