not many Thais on here,
I spent 160,000thb, for a 5kw system with 11.5kw of battery, that's reduces my monthly bill to next to nothing, last full year i produced 5mwh, at 10thb a unit that's 50,000thb,( see tropicalevo's post) even at the normal 5thb its still a good saving and good for the planet.