A Hitachi Ltd. subsidiary plans to offer rooftop solar power solutions, exclusively targeting more than 400 India-based Japanese firms amid growing corporate use of the sun's energy in the South Asian country, according to company officials.

Hitachi High-Technologies Corp., which teamed up with India's leading rooftop solar solution provider CleanMax Solar in May to tap emerging business opportunities in the sector, will initially target around 100 Japanese companies by 2020 to offer such solutions, the officials said.

"We have zeroed in on over 400 Japanese firms, mostly from the manufacturing sector, which are likely to go for rooftop solutions to run their factories as solar energy is becoming affordable in the country," said Ryo Kobayashi, electronic components and material department manager at Hitachi High-Technologies, based in Tokyo.