WEP

No problem switching between modes, I even have some of the mode changing automated from Home Assistant using https://github.com/mletenay/home-assistant-goodwe-inverter
Some important points to be aware off
Don't switch to "offgrid" mode. If you do, the inverter will drop all power on backup side when you reboot You need a reboot for a new selected mode to take affect If grid is active, you can reboot and backup load won't lose power, except if you were in offgrid mode prior to the restart Depending on what you want to do, its sometimes better changing the on-grid DoD value to manage the battery for loadshedding. This is what I do the most as it doesnt need a reboot a reboot causes solar generation to drop to 0 AND it needs to relearn the panels as if it was the first time connecting the panels, so generation starts slow and takes time to ramp up fully I only change between backup and general, only after the sun is down and if grid is active. Eco mode can also be used to change between charging and discharging.