Growatt old model like -S firmware download 1. Growatt 30000-50000 TL3-S firmware Download ( Common Version) THAA15xx 20200428pm.hex thaa-xx18 20200630.bin You need to upgrade 2 firmwares: THAA15xx 20200428pm.hex should be upgraded firstly, then thaa-xx18 20200630.bin finally 2. Shinebus Download Shinebus Old Version Shinebus New Version Shinebus Old Version mainly for Growatt 40K TL3-NS, other models … Continue reading Growatt old model like Growatt -S firmware download