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  1. Thingol

    The Sunpal Co. LifePo4 Lithium Battery Scam - My experience and advice

    I wanted to share my experience here, mostly for the benefit of others to ensure nobody else goes through the horrible experience I had with Sunpal Power Co., Ltd, Hefei, Anhui, China, a seller I found on the Alibaba platform (see link to supplier profile). If this sounds like one of those "do...
  2. Thingol

    Help diagnose JBD 200A BMS issue-smoked SMD resistors

    I recently purchased this JBD BMS here at the IC GOGOGO Aliex store and I am currently locked in a refund tussle with the seller. Seller is unsurprisingly unwilling to replace or refund. I would like some assistance diagnosing and fixing the problem to see whether repair would be the best...
  3. Thingol

    Decoding BYD cell serial number-non-standard QR code

    Hello folks, I am having some trouble decoding the technical details of the cells in the attached photos. These are BYD, but the serial number does not appear to follow the modern naming convention as with EVE cells for example. According to the guide here, the number of digits should be 19 or...
  4. Thingol

    4S 48V/200A BMS for 12 x 4 battery bank

    Hello folks, In my battery bank setup, I have got four identical 12V LiFePo batteries connected in series into a 48V bank. Each battery here has got its own BMS i.e., the BMS's do not talk, each does it's own thing. As you might guess, the first battery to charge up goes open circuit and so the...
  5. Thingol

    Trouble finding Victron products: where to buy internationally??

    Hello Folks, I have been looking for for an international supplier (preferably in Europe where I live) for the Victron Easysolar 5000VA/150 MPPT for my solar project in Kenya. I just cannot find any reputable suppliers that will sell and ship over there. I have been through Amazon Germany...
  6. Thingol

    Growatt SPF 5000ES Vs Growatt SPF 5000 HVM-WPV

    I am in the process of shopping for an off-grid inverter and was just wondering, what is the difference between the Growatt SPF 5000ES and the Growatt SPF 5000 HVM-WPV counterpart? I see the two are from different series and the datasheets' first page would appear to suggest that the ES line has...
  7. Thingol

    LiFePO4 Battery Bank in Series (48V or 60V) balancer

    Hello folks, I intend to series-connect four or five 12V Lithium batteries to make a 48V or 60V bank for my residential solar project. From my reading here and here, I understand that keeping the four/five units in balance is critical. Note that each of these units already have an internal BMS...
  8. Thingol

    For completely off-grid SMA-powered system, why do you need both PV Inverter and Battery Inverter?

    Hello folks, I am working on the design of my off-grid system in SMA Web Design tool. One thing I find confusing is why I need both a PV inverter (Sunny boy 6 for example) as well as a storage inverter (Sunny Island). I thought that modern inverters integrate DC-AC. My System would be similar...
  9. Thingol

    Getting Solar Panels and Lithium Batteries From Sunpal Power

    Hello from Switzerland (and Kenya) sunny folks! I am new to the forum and literally stumbled in while researching for my upcoming, first ever solar project. I thought I would share what I have been up-to so far and listen to any thoughts/advice the community may have. The project site is down...
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