RaeesD

A colleague made the below home-assistant compatible add-on for data retrieval from the BMS via the master battery's RS232 port: https://github.com/Tertiush/bmspace

I had 2x Volta Stage 1 batteries in parallel since May 2023 with firmware v15.44. They were reaching 100% charge together with all cells balanced within 30mV, but the packs SoC drifted apart as the batteries drain, with pack 1 on 25% while pack 2 drops to 20%. The state of health on pack 1 was 100% and pack 2 96%, so pack 2 is now accumulating higher DoD. The supplier suggested I need a firmware update, so last night I updated them both to v15.58 successfully (each completely isolated and dip switches off), have yet to see if the SoC drift fixes itself but at least the inverter reports the average SoC instead of alternating between the 2 like it did before. Only possible issue is the cycles count for both batteries went up 10x and I'm not sure if that is just the new scaling factor is 0.1 instead of 1? Over a period of about 10 minutes pack 1 went from 260 to 2600 and pack 2 from 249 to 2498 and then they stayed there since, will give it a couple more days and see.

Nothing special, the normal [email protected] email. It probably depends who you get on the other side. I haven't been able to use these files though, the SolarMan and Deye apps don't give the option to upload a file, SolarMan website says "Firmware upgrade function is currently not available", the Logger webUI also just does nothing when I try to upgrade. Not too fussed though, nothing to fix atm.

I receieved the attached firmware files from Deye support today but have not used them to upgrade (SUN-8K-SG01LP1-EU). I was emailing them about a once-off (so far) F18 error which they say was a false alarm, then offered to upgrade my firmware. I asked for the files so that I could choose a convenient time, but also there aren't any issues with the inverter so don't want to fiddle with it. Use at own risk. MCU1-SG-Ver0000-C367-CK.bin MCU2_6025US_NC_NR8K59V.bin LSW3_15_FFFF_1.0.9E.bin

I think they do the update in two steps, your Main should get updated to 6024-1724 soon. My main fw update was done remotely (2023/05/30) unannounced and resulted in the power going off for a few seconds.

I got mine 3rd March, same version as yours. Emailed Deye support but still waiting for a response. Why aren't these files just available from their website? I'll post it here if they eventually send it. 22/03 Update: Firmware was updated on 20th March, remotely by Deye, to 3382-1515.

Also interested, the price and spec imply quite good value, about 23k for 5kWh 1C.