As a general trend, the allotted transformer capacity for grid-connected solar power plants is between 15 per cent and 30 per cent. Maharashtra as an exception has 40 per cent allotted transformer capacity for solar. The payback period largely depends on the tariff of the particular state. The higher the grid tariff, the lower the payback period.
Also, the question is about how much of your consumption can be offset using solar and how much you are allowed to install. So if you have been thinking that you will install only solar and not consume from the grid at all, that is dependent on your state’s regulations. For example, in Haryana you can install a capacity equalling 100 per cent of your connected load. However, in New Delhi, you have the option of exceeding your connected load by paying extra charges. The table gives you the figures of how much solar you can install as a percentage of the connected load.
The allotted transformer capacity is filled on a first-come first-serve basis. So if you are looking to benefit from rooftop solar for reducing your bill, you might want to consider doing this soon. Once the allotted transformer capacity is saturated, you may not be able to connect your system to the grid for a while. You can take a look at Sunkalp Energy’s website (www.sunkalp.com), which is an aggregator that would help you go solar and connect to the grid.
Tanya Batra is vice president – marketing, Sunkalp Energy