A TDRI energy analyst says the government's household rooftop solar scheme suits homes that use most electricity during the day. Without batteries, which the scheme does not cover and which remain costly, homes that use power mainly at night gain little. Panel prices have fallen, but Thailand is unlikely to make panels locally, as Chinese supply is far cheaper. Clean power sold to the grid for businesses depends on grid connection fees, which the government has not yet set, so a direct PPA scheme is still pending.