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Reviewed in the United States on August 15, 2023
Been having problems for the 3-4 weeks of using this inverter. The power output fluctuates widely when the house AC is on from 40W to 1150W. When the window AC unit is on, which is only 120V, the power to run it is about 800W. The inverter in this case produces a steady 800W, but this inverter is a 240V setup and that creates a problem for me here in the U.S. The inverter pulls the required 800W but it splits it between the two 120V line. I call them L1 and L2. The window AC is on L1. Yet only 400W is sent down L1. The other 400W is sent to L2. How does the power from L2 get to L1. It does so by feeding 400W back into the grid and than back to the house. When the 800W is being produced by the inverter the inverter display only shows 4W coming from the grid. When I do power readings on the main lines coming into the house I am reading around 400W on each line. Not 2 to 4W as the display shows. Now my clamp meter cannot tell which direction the power is flowing. So since I am using a dual coil sensor setup to monitor each power line coming into the house, power on L2 must be going out into the grid and power coming into the house on L1, and since the coil sensors can tell the power direction the power going out cancels the power coming in on the sensor and as a result the inverter displays only 4W. On a positive note the manufacture said it was a motherboard problem and is sending a replacement for free. It is past the amazon free return time frame so I am stuck with this inverter. I think a better set up would be to get two 1000W inverters to monitor each 120V line coming into the house separately. So if one line requires power the inverter on that line will be called into action while the other inverter will sit idle. This is my theory. I could be wrong, but since the electric company called me on my solar because they detected feedback into the grid and said to stop using it until I contract with them I think my theory is sound.
David L. Lewis
Reviewed in the United States on July 20, 2023
This is the second one I’ve bought, the first one didn’t last a year, this one, not three months. Failed and blew my 240V breaker. Can’t return it after 30 days. I’ll never buy from this company again.DaveUpdate 08-30-23. YoungHui did his beat to resolve the problem by sending me four AC transistors and a fuse that was to be soldered into the PC board. A little much for a homeowner to do, but I was up for it. In the process, I saw where at least two of the micro transistors had blown and cracked and left a scorch mark on the PC board. I’m out.I do appreciate his efforts in trying to fix the issue.Dave
DKT
Reviewed in the United States on August 31, 2022
Pros: Works well overall. Fan not too loud. Throttles down when battery cutoff voltage is reached, maximizing energy extraction from the battery (e.g., draws at constant 48v while reducing current/watts).Cons: Needed to modify sensors to work with standard 240v two phase US wiring for whole house coverage. I bought two 240v models which I use in parallel. I used both clamp sensors, one on L1 and one on L2. The sensors were wired in series, then split in parallel to each inverter. There are Youtube videos on how to do this. Finally, even with these modifications, it fed back a minor amount of power to the grid (max draw was 15w at night for a 15 minute period). I ordered a custom made cable for the two units on ebay which contains a calibration feature that may fix this problem. The system does not seem to feedback during the day at higher loads.
Rod Sterling
Reviewed in the United States on August 27, 2022
Based on reviews both on Amazon and other sites, I wasn't expecting the unit to preform as well as it is.I used to a clamp meter on the main lines and calculated the power reduction of the incoming grid power and it very closely matched the reported output on the micro LCD screen which was around 86 %.The fans are a little rattly when on slow speed, and I recommend a good magnifying glass to read the LCD screen but other than that I am impressed with the electrical preformance of the unit.
linh vo
Reviewed in the United States on August 26, 2022
Bought 4 of this (one on June 29, 2022; one on July 2, 2022). Both died on August 25, 2022. Less than 2 months usage. I don't why I cannot get the warranty. In facts, I cannot even ask for the warranty question. Anyway, Amazon offer me to return the items but I have to pay the restocking fee. BUT Amazon said when item return, call them so they can take care the restocking fee (nice of Amazon). But what about the people who sell this junk.Bought 2 more after getting my refunds. Same thing that they both died with the same death; same duration of operation (20s days). It's the worse. BTW, I only have 1200 watt of solar panel to this devices.I think styrofoam cup is tougher than this POS.
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