Solar just doesn't worth the trouble in Malaysia with current pricing of battery and solar panel efficiency.

To best way to save electricity is to use high energy star electronic and practice rational use and house insulation.

Also don't be a fat ass, saving on food cost too.

NEM? I don't know how that work.
But our weather has too many cloud which can reduce the efficiency of solar power.
Also it is only better if the solar panel can follow the sun.