The Raheja Eternity Housing Society initiated several energy conservation and renewable energy projects from December 2016 to September 2017 to reduce their high energy consumption and bills. They replaced over 600 lights with LED bulbs, installed 55 motion sensors, and implemented a two-phase rooftop solar system totaling 81.5 kW. These measures reduced their monthly energy consumption by 74% from 25,900 to 6,800 units and lowered their energy bill by 94% from Rs. 3,59,280 to Rs. 20,000. The projects also decreased their CO2 emissions by 66% and contributed to a 78% reduction in monthly maintenance fees.

1. Energy Conservation/
Renewal Energy Initiatives
Raheja Eternity Housing Society, Thakur Village,
Kandivali (East), Mumbai 400101.
108-09-2018
Presented for ADDA Rise High
Awards 2018

2. 2

3. Introduction
Salient Features:
❖ Building has 229 flats with three wings and 20 floors.
❖ It is located just adjacent to National Park.
❖ It has an over all area of 5,10,000 sq ft with two levels below
ground level for parking.
❖ Occupancy started from April 2016.
❖ Society formed in December 2016.
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4. Introduction
Salient Features (cont…)
▪ On the month of Society Formation, the monthly maintenance charge was Rs.
18000/-.
• It was in fact extremely high.
• On examining, found the high cost of maintenance was due to the combination
of various factors.
• One of the them found was on:
• Very High Energy Consumption at more than 25000 units/month
• As a result, Very High Energy Bill at more than Rs. 3,60,000/- per month
To control this energy factor, Immediate Initiatives on Energy Conservation and
Renewal Energy Generation was initiated .
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5. View of Raheja Eternity
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6. Wholesomeness of the Initiatives
• Initiatives taken that resulted in following fruitful results:
• As on date the energy scenario is:
• Energy consumption came down from 25900 to 6800
units/month
• Energy bill came down from Rs. 3,59,280/- to Rs. 20,000/- per
month
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7. Energy Conservation
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8. Energy Conservation
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9. Savings from Energy Conservation
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10. Initiatives on Energy Conservation in Dec -16
Month Action Initiated
Dec-16 Regulations of high wattage lights in parking area
❖There were 541 high wattage tube lights in two levels
❖All of them were switched on for 24 hours
❖Selectively regulated the timings
❖50% of them were used for 12 hours and the rest for 24 hours
❖Energy conservation was in the tune of 70 units per day
1008-09-2018

11. Initiatives on Energy Conservation in Jan & Feb-17
Month Action Initiated
Jan-17
&
Feb-17
Replacement of entire high wattage tube lights with LEDs in parking area
❖There were 541 high wattage tube lights in two levels
❖All of them were replaced with LED bulbs
❖Identified and Isolated unwanted electrical loads
❖Replacement took 2 months
❖Energy conservation was in the tune of 235 units per day
1108-09-2018

12. Initiatives on Energy Conservation in Mar-17
Month Action Initiated
Mar-17 Replacement of entire high wattage lights with LEDs in Lift Passages
❖There were 360 high wattage tube lights in 60 passages
❖All of them were replaced with LED bulbs
❖Replacement took more than one months
❖Energy conservation was in the tune of 165 units per day
1208-09-2018

13. Initiatives on Energy Conservation in Apr-17
Month Action Initiated
Apr 17 Modification in Electric Circuit in stairs
❖There were 60 high wattage tube lights in stair cases
❖All of them were replaced with LED bulbs
❖Stair case lights were attached to the passage lights , running for 24
hours.
❖Modified the circuit and isolated the operation of stair lights
❖Regulated the time of operation of stair bulbs
❖Energy conservation was in the tune of 25 units per day
1308-09-2018

14. Initiatives on Energy Conservation in May-17
Month Action Initiated
May 17 Energy Conservation in Elevators
❖There are nine large elevators .
❖Each Elevator had 6 high wattage tube lights.
❖Total there were 54 tube lights in 9 elevators, replaced with LEDs
❖Introduced sleep mode in the elevator electric circuit.
❖With this mode, lights are automatically switched off , if the lift is not
used for more than a minute.
❖Energy conservation was in the tune of 87 units per day
1408-09-2018

15. Initiatives on Energy Conservation in June-17
Month Action Initiated
June 17 Energy Conservation through Rooftop Solar
❖First phase of Rooftop Solar System( 65kw) commissioned.
❖The power generation is connected to Tata Power Grid.
❖During the month, there has been reduction in monthly energy bill by
Rs. 50,000/- .
❖Renewal Energy generation through Solar System started.
1508-09-2018

16. Initiatives on Energy Conservation in July-17
Month Action Initiated
July 17
&
Aug 17
Energy Conservation through Installation of Motion Sensors & Second
Phase of Solar System
❖Second phase of Rooftop Solar System(16.5 kw) erection started.
❖Meanwhile, installed 55 motion sensors on stairs for further
conservation of energy.
❖Renewal Energy Generation further saved is 15 units/day
1608-09-2018

17. Initiatives on Energy Conservation in Sept-17
Month Action Initiated
Sept 17 ❑ Energy Conservation through Installation of Second Phase of Solar
System.
❑ Commissioned the 16.5 kw Solar System on 26/9/17.
❖With total installed capacity of 81.5 kw Solar System, the peak
generation was 377 kwh ( units) per day.
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18. Rooftop Solar & Residents’ Involvement
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19. Execution
Staff Involvement:
The in-house staff were fully involved in executing:
❖ Removal of high wattage tube lights fittings.
❖ Fixing fittings for more than 600 LED bulbs
❖ Fixing of more than 55 Motion Sensors
❖ Regular weekly cleaning of Solar Panels
❖ Monitoring daily generation of energy from Solar
1908-09-2018

20. Execution
Residents’ Involvement:
There has been deep involvement of residents at different stages for:
➢ Procurement of LED products & Fittings
➢ Preparation of specs for Rooftop Solar and getting them vetted
through TERI, Delhi and awarding the job.
➢ Obtaining approval from M/s Tata Power prior to installation of Solar
System.
➢ Replacement with LED bulbs and erection of Rooftop Solar.
Moreover, nothing would have been possible without the approval of residents in AGMs.
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21. Reduction in CO2 Emission (Tons/Month)
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22. Month wise Energy Consumption since inception(units)
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23. Impact
• Environmental:
➢Reduction in Emission of CO2 by 66%
➢Reduction on Energy Consumption by 74%
• Social:
➢Highly impacted to the residents near by to replicate such steps on Energy Conservation
➢Society Children have been highly energised and self motivated to sustain the movement.
• Financial:
➢Saving in terms of monthly energy bills by 94%
➢One of the major contributors in the Reduction of Maintenance Bill by 78%, from Rs.
18000/- per month in Dec 16 to 4000/- per month as on date.
2308-09-2018

24. Thank you very much
Raheja Eternity,
Thakur Village, Mumbai
2408-09-2018