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Here is... Firmwareupdate Pylontech US2000C_3000C V3_0.zip

The batteries had different firmware. I have made an update to the firmware to make it the same on all batteries.

Hi, I have the same problem. How did you solve it?

Or is there a problem with the battery that BMS switches to protect mode? But why only after connecting some appliances?

Hi, I have a Growatt SPF inverter 5000 ES. Is involved as an island. Sometimes it happens that after turning on the LED light in the house (30W) or connecting the laptop charger (50W), the inverter will switch to the error code 04, even if the SOC is 90%. The connected washing machine (2000W) or dryer (650W) is without problems. Problems are only with some appliances. I will be grateful for any help. Firmware Version 067.01 Secondary Firmware Version 068.01

Well thank you. Q: Can I make an upgrade from v1.4 to v1.8, or first from v1.4 to v1.7 only then from v1.7 to v1.8?

Or can I use a tool? : Upgrade Tool v1.0.9 NT1.7+ST2.8.Zip Battery: Device Name US3000C Board NF4.E2 Soft version v1.4 Release Date 22-01-24

Thanks to all of you. I wrote to Pylontech to send me the current firmware v1.7 for an old battery.

I would like to ask you for information. I have a Growatt SPF 5000 ES set and the Pylontech US3000C batteries. First I had only one battery (Soft Version v1.4). Because I knew I wanted to buy two more batteries, I only used it very carefully. Now I bought two batteries with soft version v1.7. Isn't there a problem that batteries have different versions of the firmware? Thank you very much for your answer.