Fuses protect the panels when the "surge arrestor" gets short to the ground.
breaker protect (and works as a sw as well) panels from controller and inverter.
muhendis diagram shows that how it works. Your sample diagram is very basic.
Beautiful words ๐ค that were used by some others as well around the world when a mantis dresses as a butterfly.
Personally I never forget what happened in Bangkok.
I've been Bangkok resident 2 times during last 10 years and last time I renewed my extension was 3 years ago at CW. Fixed account (800,000) never been a problem.
IMO Lawyer perhaps will be needed when beneficiary/beneficiaries are not Thai. Otherwise what "Khun per" suggested (a civil documented will) would be the way.