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I have the same problem with a 20S / 200A JBD BMS, the voltage differences are at some cells 0.15V, that's not possible! What is that for a junk BMS?? :mad:

I have tested all the cells for their capacity, the cells were between 109Ah and 117Ah, none reached 120Ah. I have filed a buyer protection claim with Alibaba. It has been rejected. So I can only advise everyone to pay only by credit card or Paypal. Alibaba's buyer protection always decides...

wow... this Trina Solar panels are for 375W 170 USD here in Germany too. The import tax for panels is as far as I know 0%, so maybe we can make a collective order from USA. Other option is to buy used cells in Germany and send to CR, the price for mono cells is mostly around 0,23 USD/Kwp...

Hello all, Does anyone have experience with the Epever IPower-Plus (3000W)? The specs seem quite good: efficiency max. 93.5% efficiency rated 89.5% Zero Load 20W wight 7.3kg Stability120V -7+3% Zero load...

I supply them with the low capacity tests, pictures and so on, of course! There was no justification as to why it was rejected, except that they wrote that the seller wrote that I didn't do the capacity test properly.

I try to read values from a EPEVER IP-plus inverter over the RS485-Modbus and read the values in Node-Red. But nothing works. Not the original USB cable nor the ELFIN EE11A. Someove have a working solution??

The tester has sense leads to measure voltage directly at the cells terminals! I tested many cells and the tester works correct! I Also checked the voltage with a high precision voltmeter. But I dont like to discuss my test equipment, more the appearance of the cells....

I am looking for a 48VDC to 120VAC inverter, 3000-5000W with high efficiency, is there any recommendation? 95% or better it should be, the Victron Venus can do that, but it's a bit too expensive for me....

I have already checked, the connectors are new, no corrosion, everything fits perfectly. All the time trouble with this chinese shit...

Sorry, of course Phoenix, not Venus...

I made the mistake of not paying by credit card but by bank transfer.... :cautious:

Hello, does anyone have experience with the best way to ship cells from the USA to Cosa Rica? It seems the Chinese are overcharged, so I thought it might be easier to ship the cells from the USA. That brings me to my 2nd question: buy cheap Lifepo4 (solar storage 100-280 AH) in the USA???

Hayley wrote me, "brand new and grade A".... it is OK to sell grade B if the seller also sells it as grade B. But if the seller sells Grade B as Grade A, that is FRAUD! I have already read here in some posts that people have bought 280Ah and then measured 272Ah or so and are "very happy." :oops...

thanks for all of the answers, but pity all the the recommended inverters are more expensive as the Victron Phoenix or a Multiplus. Isnt there a cheaper inverter as 1000 USD?

Here's a good video of a Chinese dealer being honest, maybe you know it:

Hello, I ordered CATL 120Ah cells at Alibaba from Dongguan Lightning New Energy Technology, the seller was Hayley! I ordered there, because of the good reputation here and in the net. The cells arrives some days ago and I am quite angry because I think the cells are used: Upper cover foil comes...

I use a professional battery capacity tester...

Hi, the link you send is very helpful, thanks alot!