my inverter has only pyl and does not support lithium battery,it has firmware 38.03 and does not have lib protocol, internet said update firmware to 38.16 will solve your problem

On 2026/05/26 at 1:38 AM, ali said:

t has firmware 38.03 and does not have lib protocol, internet said update firmware to 38.16 will solve your problem

I don't have 38.16 in my collection, but I have 38.19, which should have all the features of 38.16.

It is available here.

thank you very much. but i dont have permission to download it.

thank you @Coulomb , i appreciate your help bt this is remote panel firmware. but i need main CPU firmware. link you provided har cpu version 7.xx and remote panel version 38.xx

On 2026/05/30 at 9:15 PM, ali said:

... but this is remote panel firmware. I need main CPU firmware.

I don't know of any 38.xx main firmware. And the remote panel / display firmware has many jobs, including communicating with the battery BMSs. It's not clear to me how much support the main firmware needs to support more than one BMS battery type; I suspect it's no more than is already needed to support Pylontech protocol.

But if more is needed, you'll have to tell me what version your existing main (U1) firmware is.

thank you, current u1 is 38.03