Just got this inverter and took a few photos. I looked for some time for a low cost quality inverter that I can recommend.
The two down sides of this inverter is the relatively high self consumption 43W (measured as spec says 35W) and it only comes as a 230V AC version (not a problem for those outside North America).
All other things seems to be positive including the very low price and excellent build quality plus excellent spec mostly the 10 second for up to 150% overload and 5 seconds for up to 200% overload (that is 10x more than most other inverters).
I do need to test this claims but I have no reason not to think this are real.
I have a fairly similar inverter from MPP Solar for almost 5 years of daily use and it performs great tho this is a 2.4kW version so smaller and a different brand but similar design.
By looking at the internal construction the design seems to be a large step UP DC-DC converter (bidirectional to also be used as a charger) probably making around 400Vdc then from that they make the 230Vac
And there is also an MPPT but that is also a step up and requires at least 120V max power point voltage at the input so they recommend minimum 5 panels in series and the output of that will also be around 400V and it will parallel with the DC-DC converter connected to battery then from that the 230V AC is made.
It seems they are using ST IGBT transistors everywhere 650V rated different models.
The DC-DC on the battery side has two transformers so there are likely two parallel circuits and there are 4 input capacitors 4200uF at 35V for this 24V version guessing they will have 63V rated capacitors for the 48V version of this inverter.
The limiting factor for continuous use is the input connector that is only 125A rated tho installed between two fans so should at least be able to handle what they claim 162A for some minutes and same with the 150A rated fuse that is cooled by the fans so maybe it will be fine.
Now a 8s LiFePO4 is almost always above 26V and assuming that 26V x 162A = 4212W on input side but if we consider the connector 125A limit (much more conservative) then is 3250W on DC side that will correspond to 3022W on AC side assuming that spec peak efficiency of 93% (I will test this).
Looks like now is at 410CAD (I can see the price in CAD as I'm in Canada) + 168CAD shipping but I paid 158CAD shipping so in total I see I paid 567CAD whatever that converted in USD at that time.
Shipping was fairly fast with FedEx I just needed to pickup from airport as they can not deliver to PO Box.
In any case just under 600CAD delivered is an excellent price. I also ordered from Mouser a 2500W isolation transformer so I can convert 230V in to 115V but this is a bit of a different story. I now have a 1000W isolation transformer with the current 2400W inverter and so I can supply loads of up to 2000W as long as average over long period is below 1000W all is fine.
And 2000W is my max load for one of the ovens so I do not need more but I got this to test and be able to recommend to others.
A few photos I took just after I opened the box. It will take some time before I receive the transformer and maybe the batteries and then I will do more tests and compare to my current inverter. But first impressions are very good.
Forgot about the color (not a big fan of blue but not that relevant :) )
Look at manufacturing date is fresh from factory :)
There are two PCB's the large one on the Left contains the battery DC-DC converter includes the two large transformers at the bottom and the top part is the high voltage DC to AC conversion plus the UPS part with the 3 relays.
Then the smaller PCB on the right is the MPPT converter and there are two wires paralleling the two high voltage busses.
The two ST branded IGBT for the MPPT and an IXYS branded diode.
The 330uF 500V rated capacitor on the MPPT output. Notice the red and black wires going to the inverter high voltage side.
Two of the AC bypass relay. There is a third one not in the photo.
Main control board.
The 125A rated battery DC connector and the 150A fuse. There was a spare fuse in the box but hopefully will never be needed it seems to have 0.2mOhm
The input capacitors 4200uF 35V two next to each transformer so 4 of them in total.
The two 330uF 500V capacitors on the DC-DC output side. I will need to measure what voltage they have here but I guess it is around 400V maybe even 450V so do not play inside this inverter and actually any other inverter :)
Again manufacturing date just last month and even board design date is late last year.
IGBT for the AC side also from ST just a different model than those on the MPPT.