2000W Peak 6000W Pure Sine Wave Power Inverter Charger DC 12V to 120V AC Output Converter with LCD Display, Off Grid Low-Frequency Inverter for Sealed Gel AGM Flooded Lithium Battery Charger

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.

The unit functions electrically as it should. It has very fast switch-over to battery from utility when there is an outage.Other have mentioned that the Line and Neutral are reversed on theirs but the one I got was correctly wired so the maker must have corrected that manufacturing issue.The fan is super loud though and the speed also ramps up and down constantly which adds to the annoyance of the volume. I will be replacing the stock fan with a compatible but quieter one soon.I definitely recommend this unit especially if you have it in an out-of-the-way location where the noisy fan will not be a factor.

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