The FW can be found on a white sticker on the front of the box (you will see DSP, COMM and Wi-FI) or seen via wireless P2P connection on the DeltaSolar App “Info” page HERE, (video titled “How to Monitor your inverter Offline when you don’t have Internet onsite”)
- Connect to the inverter Wi-Fi
- Turn off mobile data
- Sign in
- Manage devices
- Menu (top left) -> Setting -> Update
- Password: 4613
- Wait for the connection screen, when available select 4G/3G or a router with internet.
- Press next and wait
- Select your inverter model
- Select the FW type (typically COMM is what needs to be done for compatibility, DSP may give you access to additional grid codes)
- Press load hex file
- Press update inverter and wait until completion.
- Stay close to the inverter while updating (depending on the FW selected it can take ~3-8 mins)