Mumbai society goes solar for 81% of its needs

The solar system will be lighting up the common areas of the society including lifts, staircase lightings, and water pumps
Mulund Darshan housing complex have installed a rooftop solar system of 11.05 kilowatt power (kWp) capacity.(HT PHOTO)
Mulund Darshan housing complex have installed a rooftop solar system of 11.05 kilowatt power (kWp) capacity.(HT PHOTO)
Updated on May 21, 2018 12:09 PM IST
Copy Link
Hindustan Times | By, Mumbai

Mulund Darshan housing complex, located in Mulund (East), is one of the latest societies in the city to harness solar power for their electricity requirements.

The J and K wings of the society have installed a rooftop solar system of 11.05 kilowatt power (kWp) capacity consisting of 34 panels spread across 1000 sq. feet area on the roof.

The solar system will cover 81% of the society’s electricity requirements, claim residents. It will be lighting up the common areas of the society including lifts, staircase lightings, and water pumps for the two wings.

“We are constantly striving to include environment-friendly ways of living and have taken several steps to encourage our residents to be more responsible towards our ecosystem. Adopting solar power is a much appreciated inclusion in that. We believe steps taken like these make all the difference,” said S Balasubramaniam, resident.

The grid connected rooftop solar system will generate approximately 16,900 units in a year, 45-50 units per day. An average two bedroom-hall-kitchen apartment in Mumbai consumes 10-12 units of electricity per day. The society also has a net metering policy that facilitates the solar system to be connected with the electricity grid.

“Units generated from the solar system will be utilized and the rest will be sent back to the grid. Any additional units required are taken from the grid. This way, at the end of the year, we pay only for the ‘net’ units consumed,” said Balasubramaniam.

Avishakti Rooftop Solar, the private firm that installed the system during the first week of March, calculated that it will reduce carbon dioxide (CO2) emissions equivalent of 15.30 tonnes in a year.

“The system will result in annual savings of 1,34,000. While the society’s current electricity bill is about 14,166 per month at 7.9 per unit across five metres, electricity generated through solar will reduce the electricity bill to 2,500 per month by combining all metres at 10 per unit. This means, an 82% drop in electricity expenditure,” said Animesh Manek, founder and director, Avishakti Solar.

According to the Ministry of New and Renewable Energy (MNRE), an 11.05 kWp capacity system can mitigate 339 tonnes of CO2 during the entire lifespan of the system, and is equivalent to planting 548 full grown teak trees over the life time.

The society spent 7,75,000 to install the solar project including GST, which will take a maximum of four-and-a-half years to recover.

“Installing such a system comes with an initial cost which is a bit high. While evaluating the option, we had extensive discussions with Avishakti team about the system’s durability, lifespan, and the generation. We figured that apart from recovering costs, the system will run for 25 years and demands no maintenance. It made sense for us”, said KR Ramakrishnan, society member.

Manek said that the entire cost could be recovered over three years if the society received the subsidy for installation from the state government.

“All paperwork for the same is complete, and we expect that at 30% subsidy, the society will get 1,83,000 from the state. Therefore, the recovery cost for installation will drop by one-and-half years,” he said.

“However, new rules are being promulgated by MNRE for fresh installations. Other societies planning on adopting solar need to check the updated guidelines.”

Why should you care?

Solar energy is a free source of renewable energy. It does not cause pollution and instead, reduces the carbon emissions that come from burning coal, gas and oil for electricity generation.

Basics of rooftop solar panels

Sunrays contain particles of light called photons that hit the crystalline photovoltaic cells of the solar panel, which are similar to those seen in calculators and rechargeable flashlights. The solar panels convert photons into electrons in the form of direct current (DC) electricity, which is sent to an inverter. The inverter converts DC current into alternating current (AC), which is then supplied to power lights, fans and all other electronic equipment.

Half of Mumbai’s electricity can be generated by solar power

A recent study by the Indian Institute of Technology Bombay (IIT-B) and think-tank Observer Research Foundation (ORF) found that Mumbai has the potential to generate 1.72 Giga Watt Peak (GWp) solar energy through photovoltaic (solar) panels installed atop buildings. This means solar energy can take care of half of Mumbai’s power needs. Currently, the city generates only 5 Megawatt Peak (MWp) solar energy — 0.3% of its potential.


    Badri Chatterjee is an environment correspondent at Hindustan Times, Mumbai. He writes about environment issues - air, water and noise pollution, climate change - weather, wildlife - forests, marine and mangrove conservation

Close Story

Less time to read?

Try Quickreads

  • Due to the mishap, locals rushed to the spot with cans and other utensils to stock up on edible oil (HT Photo)

    Locals stock up on edible oil after tanker turns turtle

    Mumbai With inflation pushing up the prices of essential commodities, including something as staple as edible oil, residents of Tawa and nearby villages off the Mumbai-Ahmedabad National Highway were in for a treat when a tanker with 12,000 litres of unfiltered groundnut edible oil turned turtle on Saturday morning. A tanker was moving from a Surat oil mill to Mumbai for further filtration when the driver, Vishwas Hanumant Galande (30), lost control of the vehicle.

  • The Manjhara reserved forests in Belrayan range of Dudhwa buffer zone where the incident took place is known for movement of wild animals, including tigers, wild tuskers and leopards. (Pic for representation)

    Man killed in suspected tiger attack in Dudhwa buffer zone

    A 30-year man identified as Mahesh of Dumeda village under the Tikunia police limits was killed in a suspected tiger attack near Manjhara forests in Belrayan range of Dudhwa buffer zone on Saturday. Belrayan range officer Vimlesh Kumar, Tikunia police officials and revenue department officials rushed to the spot and inspected the scene. The area where the incident took place is known for the movement of wild animals, including tigers, wild tuskers and leopards.

  • Kalyan Dombivli Municipal Corporation has rejected 53% of the applications for compensation to the kin of the deceased due to Covid as their mobile numbers are not linked to bank accounts. (HT FILE PHOTO)

    53% applications for Covid compensation rejected in Kalyan Dombivli Municipal Corporation limits

    With over 53% of the applications filed for compensation by the kin of Covid deceased rejected due to technical reasons, the Kalyan-Dombivli Municipal Corporation has appointed two officials to guide people in filing the application, resolve their issues and get the amount credited to their accounts. The KDMC has received 4,409 online applications for compensation. Out of these 1,687 have been approved, 2,370 rejected and 352 pending or sent back.

  • A 27-year-old man has been arrested for killing his 20-year-old roommate after a fight over who cleaned the room in Mahape village. (HT FILE PHOTO)

    Man arrested for killing roommate in Mahape village after fight over household chores

    The Turbhe MIDC police have arrested a 27-year-old man for stabbing his 20-year-old roommate after a fight over cleaning the room. The accused, identified as Manoj Pulvanath Medak, stabbed his friend, Debajit Dhandhiram Charoh, on the neck and killed him on Friday night. The accused and the victim were from Assam and stayed in a rented room in Mahape village. The duo worked as lab boys at a company in Mahape.

  • Less than one year after a gruesome gangrape of a 22-year-old Bangladeshi woman in Bengaluru, a city court has slapped seven of the 11 total convicted accused with life imprisonment sentences. 

    Bengaluru: 7 get life sentence for 21-year-old Bangladeshi woman's gang-rape

    A Bengaluru court on Friday found 11 people guilty of gang-raping a 22-year-old Bangladeshi woman in the city on May 27 last year. The accused included three women and were all given punishments ranging from nine months to life term imprisonment. The incident had occurred in Ramamurthynagar and made rounds on social media after videos of torture and rape were shared widely. All the accused are reportedly illegal immigrants from Bangladesh.

Story Saved
Saved Articles
My Reads
Sign out
New Delhi 0C
Saturday, May 21, 2022