Prime Minister Anutin Charnvirakul has defended the government's household solar rooftop scheme against opposition criticism of its proposed 200-billion-baht loan package, insisting that the initiative is not a "blank cheque". Mr Anutin said public funds would only be drawn down when eligible households participate in the scheme.Speaking on his weekly programme on Saturday, Mr Anutin said the scheme was part of a wider restructuring of Thailand's energy sector, rather than simply offering.