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Hi,

I’ve seen this advertised on eBay for about £50. A dongle & some software allowing insight into what’s going on within the Pylontech battery.

Does anyone have any experience of this they can share?

Thanks - Rob

Very easy to make your own for much less money. Software is all available to download on the internet.

If you have an older battery you need to send a lower bitrate command code to the battery for the proper serial to start.

Swwils wrote: ↑Wed Oct 19, 2022 2:05 am If you have an older battery you need to send a lower bitrate command code to the battery for the proper serial to start.

US2000C as master battery & then 4 x US2000C as slaves …..

Tinbum wrote: ↑Wed Oct 19, 2022 1:16 am Very easy to make your own for much less money. Software is all available to download on the internet.

Any pointers then please, links to anywhere explaining how to do it. Thanks

Lincs Robert wrote: ↑Wed Oct 19, 2022 8:40 am

Tinbum wrote: ↑Wed Oct 19, 2022 1:16 am Very easy to make your own for much less money. Software is all available to download on the internet.

Any pointers then please, links to anywhere explaining how to do it. Thanks

A search of Github is a reasonable starting point: https://github.com/search?q=pylontech

There is also some useful stuff on other forums. Simplest option is probably an ESP32/ESP8266 plus an RS485 to serial module. Not hard to just read the data from the batteries and then pass it on to something like Home Assistant, via the ESP32/ESP8266 that can send the data using something like MQTT.

Thanks, it all looks doable - but a little beyond my capabilities if I’m honest. The £50 solution does look attractive as it’s “complete” and the seller offers “support”.

Its really not hard at all and would probably cost about £10. I'll send some links when I'm near my computer.

https://www.ebay.co.uk/itm/260958579253 Cut in half and put RJ45 on cut end. If you dont have an RJ45 crimper (cheap and come in very useful) just buy a patch cable, cut and splice.

https://www.ebay.co.uk/itm/292560436336

edit even cheaper here https://www.ebay.co.uk/itm/275278032717

Tinbum wrote: ↑Wed Oct 19, 2022 9:02 am Its really not hard at all and would probably cost about £10. I'll send some links when I'm near my computer.

Thanks. I note that this will take it to a 9 way d type, whereas the connection on the US2000C is a RJ45 I think?