What are the current challenges & future outlook about lending to rooftop solar projects?

India has set an ambitious target of 40 GW of clean energy generation through rooftop photovoltaic (RTPV) installations to be achieved by 2021–22. RTPV uptake, however, has been sluggish with only ~6.1 GW installed so far. Of this, more than 75% capacity comes from commercial and industrial consumers and the rest from residential and  public sector rooftops.