Great lesson about protection mechanisms of this batteries. Thank you

molte grazie, ottimo lavoro 👍

Muito fixe, realmente não há muitos videos. Poucos meses atrás a minha us3000c, ficou acender o alarm e depois nada. Tentei medir a tensão nos terminais e davam 0. Mandei para a garantia em espanha e mandaram uma nova.

@practicasaw8581

2 ай бұрын

I dont recomend Pylontech batteries, in two or tree years they will inflate. About Warranty The distributors reserve the right to give the guarantee and in practice they will not accept it even if in theory you have a 7-year guarantee, prismatic cells are better as you can always find spare parts since pylontech are special, they are 5s per module at least in the that i have.

@andrepardal9381

2 ай бұрын

@@practicasaw8581 yeah, that can be a issue real quick. I don't know what's readily available in terms of parts.

Hi loved the video helped me out so much. THANKYOU.

@tonymaint

Ай бұрын

One question tho do you have a part number for the fet that was shorted ?

@jfaria

Ай бұрын

@@tonymaint Hi, the original was an IFR6215

Viva, gostei do video, claramente Tuga, tenho um multímetro igual, muito bom mesmo. Continua com o bom trabalho.

Good video thanks for this video. I have a question l have one us3000c and the BMS has failed. I want to change the BMS card . My question is after changing the BMS do l need to reset the serial number and AH capacity and SOC of the new BMS with usb diagnostic cable?

@jfaria

3 ай бұрын

Good question, I haven't had much free time lately, but I have half a dozen swollen US2000 that I want to try and replace bad cells, I will try to see if there is an easy way to reset the BMS or change some of those parameters.

@tujuprojects

3 ай бұрын

@@jfariawhere do you get those cells?

@jfaria

3 ай бұрын

@@tujuprojects The guy who asked me to repair these had several failed units of different generations, my plan is to try and use one of them as a donor to fix the others. Unfortunately I've been busy and I didn't have time to do it yet, but I will document it when I get to it.

@tujuprojects

3 ай бұрын

@@jfaria okay, it maybe those can be bought from china as new.

Hi. Thanks for the video. I have a battery with shorted mosfets causing an alarm. Do you have any tips as to what could catch me out when replacing the mosfets?

@jfaria

2 ай бұрын

Never done that, but you might get away with just replacing one in each bank to test before you replace them all. Also check if the controller is also actively breaking the fuses like it did to me...

@karlmuller4755

2 ай бұрын

@@jfaria Thanks. I did a quick check and it seems the controller is also shorted and the 4 pin fuses you replaced. This seems like a totally common issue. What I do see is that the thermal layer skipped a few mosfets, the ones that are skipped have discolored. Must be due to heat. Not sure if this could be a factory fault on them. My battery is hooked up to a Sunsynk 5kw with a Can bus cable. Set to 50amp charge and discharge.

@jfaria

2 ай бұрын

@@karlmuller4755 How many batteries do you have in parallel? I don't know what causes the failure in this video, but most of the failures I've seen on these (especially when they swell) were on off-grid/hybrid solar setups with too few batteries. I'm starting to believe that the long term reliability of these batteries starts to get spotty when people use less than 4 batteries (10kWh) in 5kW inverters, or less than 8 batteries on 10kW inverters.

@karlmuller4755

2 ай бұрын

@@jfaria Only one battery. But the system is used as a UPS for a server basically. The constant draw is around 300w. We have had a few spikes from the aircon etc. That would kick the inverter into alarm and protect the battery. As far as I can tell its over voltage causing the swelling. On another system I have 3 x us2000 batteries running for almost 6 years no swelling or any issues.

I dont recomend Pylontech batteries, in two or tree years they will inflate. About Warranty The distributors reserve the right to give the guarantee and in practice they will not accept it even if in theory you have a 7-year guarantee, prismatic cells are better as you can always find spare parts since pylontech are special, they are 5s per module at least in the that i have.

@JohndenDunnen-b9h

13 күн бұрын

Here the PCB board of an US5000 is replaced under warranty.

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