New Delhi: India will continue to rely heavily on electricity generated using coal during the ensuing summer season when peak demand is projected to cross 260 gigawatts (GW) on likely intense heat conditions in parts of the country, a power ministry official said on Tuesday. While renewable capacities continue to be added, authorities are building coal stocks at power plants to meet the peak demand, the official said, adding that solar power would also help immensely in meeting the demand.