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There are three challenges, technical financial and implementational. They are coupled to each other. For example, if we try to achieve say 70% of electricity generated by 2030 from renewables, as I told you earlier, we have to rely on solar and wind to takes us there. Both these technologies, particularly solar have low plant factors. That means, to get the same equivalent energy of a 300MW LNG fired power plant running at 70% plant factor from solar, we need about 1000MW of solar. This is a big problem. Solar generates a very high power capacity during a shorter period of the day to give the same energy. Now, our transmission network must be rated to transmit 1000MW instead of 300MW to evacuate power from the solar plant to get the same equivalent energy. To evacuate power from solar and wind zones right around the country, we now need a very high capacity 400kV backbone transmission line network, connecting our load centres with RE zones. Right now our backbone transmission line is 220kV. But in order to transmit these high power capacities, we cannot rely on 220kV. So you have to upgrade to 400kV.
