Sorry ..have no info on firmware. I have also been trying to contact Growatt and agree they are slow to respond .
Gave you been contacting Shenzhen in China or do you have UK details you can share pls?
Sorry ..have no info on firmware. I have also been trying to contact Growatt and agree they are slow to respond .
Gave you been contacting Shenzhen in China or do you have UK details you can share pls?