This housing company in Pune is reducing the electricity bill for communal facilities by Rs 90,000 per month through rooftop solar power generation


Undri, April 6, 2022: Nyati Windchimes which is a 200 apartment company in Undri, Pune installed 45kW rooftop solar power generation panels between 2017 and 2019 which generated 200 units of green electricity per day.

Common facility energy consumption is quite high at Windchimes due to the high operating loads of a reverse osmosis plant (since 100% of the water goes through tankers), a wastewater treatment system operating 24 hours a day, 7 days a week, 10 elevators spread over 5 buildings, swimming pool filtration and public lighting. and the average monthly electricity bills were around Rs. 3.5 lacs.

After an initial hesitation to opt for solar investment, the inhabitants agreed in 2017 to start with the first 20 KW system. Subsequently, two other phases were implemented with 15 KW and 8 KW systems bringing the installed capacity to 45 KW. The total investment in the 3 phases was around Rs. 31.0 lacs and the estimated return on investment is around 4-4.5 years since our network unit tariff was at the highest level of Rs. 15/ unit due to the consumption of more than 1000 units/month on each of the meters, explains the president of the WC, Avinash Kapoor.

“Net metering has been helpful because we can also take advantage of the lighting load. However, before the implementation, the management committee carried out a study of the daily consumption hour by hour on each meter in order to make a good dimensioning of the system. This was to prevent excess generation from going to the grid before the net meters were installed (which takes several months). We have also shifted some daily loads on this meter so that all production is consumed.

Solar production helped us reduce the consumption slab on our MSEB meters and therefore contributed to reducing the amount of the bill. The main maintenance requirement for rooftop solar systems is monthly cleaning of solar panels to maintain production efficiency, checking of wiring terminations (which can corrode due to weather elements) and system health. ‘inverter.

Green solar power generation has also helped Nyati Windchimes move towards a greener society. Apart from this, to improve the environmental footprint, a team of volunteers from Nyati Windchimes led by Shyam Khante and Kaushal Gupta have developed a Miyawaki forest on both sides of the road leading to the company. Contribution to this effort has been completely voluntary and this activity has been going on for 5 years, with approximately 7,000 trees planted in the area.

Arrangements have been made to use Windchimes STP treated water to grow these plants. The forest has now become self-sufficient and many birds have taken up residence there. Wind chimes also put several nests on their trees for small birds to increase the sparrow population.

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