yeah, US started long long time ago (25-30yrs), they had discounts, tax rebates and various flavors, especially southern states. But then their electricity supply is privatize, hence there are many company's a consumer can choose from unlike ours is monopolized with a fix pricing. In general electricity was more affordable there, without currency conversion la.

If I were to suggest, gomen should just put a policy any new housing comes with a build-in solar or an option to add-on atleast