Rooftop Solar plant: powerup your house of your own

Except the nice feeling, Dutchman Toine van Megen, an Indophile who has been living in this country for over 40 years, gets nothing for the electricity he pumps into the grid from his rooftop solar power plant. If everyone could afford to be like the former executive of Suzlon and the co-Founder of Auroville Consulting, there would be a vibrant solar rooftop movement in the country.Today, industries, educational institutions and commercial establishments such as shopping malls are putting up rooftop solar — for reasons as diverse as depreciation benefit, meeting renewable purchase obligations, and energy security. However, very few home owners have taken to it, because domestic rooftop solar just does not pay.The case of Tamil Nadu is illustrative. You can put up a 1 kW solar plant under the State’s capital subsidy scheme, or avail yourself of the State’s generation-based (tapering, six-year) incentive, or just not opt for any subsidy or incentive, which is the only option available if one wants to go in for more than 1 kW system.

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The situation looks better when electricity tariffs go up, but to counterweight that are a whole lot of assumptions — maintenance costs, generation, the uncertainty and the ‘cost’ of getting the subsidies. The only way to attract home owners to put up rooftop solar is to pay a remunerative feed-in tariff, which could taper over time, says Vivek Jayakumar, Executive Director, of the Pune-based Arbutus, a solar consultancy. 

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