Ampinvt 800W Pure Sine Wave Inverter with AC Charger, DC 12V to AC 120V Output, Solar Power Off Grid Low Frequency Inverter for Lithium, Sealed,AGM, Gel,and Flooded Batteries

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

Works great as UPS. RS-485 interface was pretty easy to reverse engineer. Pin 1 : A+ Pin 2: B- Pin 8: GND 96008N1, Slave address 1: ./ampinvtstat.py Parameter : Value -------------------------- Input Voltage : 119 Input Frequency : 60 Output Voltage : 117 Output Frequency : 60 ? : 1 Load : 10% Battery Voltage : 12.9 ?. : 72 ?.. : 30 ?... : 25 Status : ONLINE, CHARGING, ON AC ?.... : 8

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 purchased this for a automatic switching battery backup for my reef aquarium. It is great for this purpose. I have tested multiple times simulating power outage, the switch over from grid power to battery power is instantaneous. This is used to run my return pump, protein skimmer and powerheads. Now I'm no longer worried my aquarium will die if I'm not around for a power outage. Running on 1, 12v 35 amp hour battery I get about 3 hrs runtime. I will be adding additional batteries to increase runtime and the ability to run my aquarium heaters as well. So if you have a reef aquarium and are looking for a backup system than can run your whole system, not just a pump or two this is it. Way more affordable and expandable than the commercial reef battery backups.

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.