The only other approach, without using RCD, is to demonstrate you've followed the inverter manufacturer's instructions for protective devices and installation conditions ... which is nearly the same thing.
In the absence of instructions, it's really not possible. Part of the selection process.
The only other approach, without using RCD, is to demonstrate you've followed the inverter manufacturer's instructions for protective devices and installation conditions ... which is nearly the same thing.
In the absence of instructions, it's really not possible. Part of the selection process.