A scheme for Hong Kong residents to generate electricity from rooftop solar panels and contribute to the government’s carbon reduction goals has suffered a setback due to a lack of grid infrastructure, according to the chief executive of the city’s largest power supplier.As many as 13 per cent of applications to install rooftop panels are facing delays or substantial scale curtailment, said Richard Lancaster of CLP Holdings.“In some more remote parts of the New Territories, there isn’t the…