We built Inverted Energy to be a facilitator in the global shift towards future mobility and energy storage. With a mission to accelerate the world's transition to sustainable energy, we have developed commercially advanced clean energy technologies, promotion sustainability by working with organisations in building energy storage projects with innovative technologies to move India forward. With the rising cost of fuel and levels of pollution, diesel generator sets are no longer a viable option. However, once combined with energy storage - it can become a cost effective option and also contribute to a clean environment. We aim to democratise energy access through innovation in energy storage technology. #GoBeyond the Ordinary

1. AN ALTERNATIVE SOLUTION TO DIESEL GENSET.

2. SITUATION
ENERGY STORAGE SOLUTION PROPOSAL
Details of the project under discussion :-
• DG SETS SPECIFICATION – 62.5kVA/50kW
• NUMBER OF DG SETS – 2
• OPERATION TIME – 24 HOURS
• WORKING MODEL – 2 DG SETS CONNECTED IN SERIES. ONE DG RUNS AT A TIME.
• GRID CONNECTION – ABSENT
• AVERAGE DIESEL CONSUMPTION – 200-250 litres per day
• AVAILABLE ROOFTOP SPACE – At most 120kW

3. PROBLEM STATEMENT
ENERGY STORAGE SOLUTION PROPOSAL
• The Cold Storage Facility was using a DG set at all times to generate electricity, which was expensive and harmful for the environment.
• Inverted Energy proposed an alternate Solar powered Energy Storage solution, which is cost efficient, reliable and contributes to a sustainable
future.

4. OUR APPROACH
ENERGY STORAGE SOLUTION PROPOSAL
• Site inspection.
- Evaluation of rooftop space and its Solar-PV technical potential.
- Documentation of the Load Profile and the wiring network.
• Acquisition of data
-Voltage, Current and Power consumed with respect to time using a Power Meter.
• Analysis of the acquired statistical data.
• Engineering of a solution set based on available parameters.
• Proposal of a financially feasible solution.

5. SITE INSPECTION
ENERGY STORAGE SOLUTION PROPOSAL
• The available roof size is 14000 square feet. The main door of the facility faces North East
• The Cold Storage Facility has a total of 3 chillers operating at temperatures as low as 10°C, -4°C and -25°C on a 3 Phase wiring connection.
• The site is within 250 meter radius of an Indian Air Force Base, an Ammunition Factory and a DRDO facility, hence, the grid electricity
network is absent.
• The facility maintains hand-written records for the per day diesel consumption.

6. ACQUISITION OF DATA – HAND RECORDS
ENERGY STORAGE SOLUTION PROPOSAL
Data from the hand records of the per day diesel consumption for both the Gensets were tabulated.

7. GRAPHICAL DATA AS PER THE HAND-RECORDS
ENERGY STORAGE SOLUTION PROPOSAL
LitresofDiesel
0.0
250.0
500.0
750.0
1000.0
Dates
5/31/2018 6/7/2018 6/14/2018 6/21/2018 6/28/2018
DG1 DG2 Total

8. ACQUISITION OF DATA – POWER METER
ENERGY STORAGE SOLUTION PROPOSAL
For June 2018, a power meter was installed by Inverted Energy with which data for Voltage, Current and Power were captured.

9. VOLTAGE VS TIME – AS PER THE POWER METER
ENERGY STORAGE SOLUTION PROPOSAL
Voltage(V)
100
150
200
250
300
Time (Hours)
00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00
Voltage varied between 235V and 243V in a day, indicating stable voltage source.

10. CURRENT VS TIME – AS PER THE POWER METER
ENERGY STORAGE SOLUTION PROPOSAL
Current(A)
17
25.3
33.5
41.8
50
Time (Hours)
00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00
Current drawn varied between 17Amps and 25Apms, indicating uniform usage of load.

11. ENERGY VS TIME – AS PER THE POWER METER
ENERGY STORAGE SOLUTION PROPOSAL
Energy(kWh)
0
3.75
7.5
11.25
15
Time (Hours)
00:00 01:00 02:00 03:00 04:00 05:00 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00
Energy consumption profile is similar as of the current profile.

12. COMPARISON OF HAND RECORDS AND METER DATA
ENERGY STORAGE SOLUTION PROPOSAL
Date DG 1 DG 2 Total
05-07-2018 345.1 306.7 651.8 647.6 0.65
06-07-2018 345 324.3 669.3 660.18 1.39
07-07-2018 378.2 334 712.2 701.96 1.46
08-07-2018 339 325 664 646.04 2.79
09-07-2018 409 294 703 667.24 5.36
10-07-2018 387 154 541 550.34 1.7
Data from the Hand Records
Data from the Meter % Error in Hand Records

13. Power(kW)
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
50.00
55.00
60.00
Time (Hours)
00:3001:3002:3003:3004:3005:3006:3007:3008:3009:3010:3011:3012:3013:3014:3015:3016:3017:3018:3019:3020:3021:3022:3023:30
60kW Load
Demand which can
be met with the
stored energy.
LOAD AND PV CURVES FOR 50% ROOFTOP PV POTENTIAL
ENERGY STORAGE SOLUTION PROPOSAL
Energy which can be
stored in Batteries.
Demand which can
be met with the
stored energy.

14. LOAD AND PV CURVES FOR 75% ROOFTOP PV POTENTIAL
ENERGY STORAGE SOLUTION PROPOSAL
Power(kW)
0.00
22.50
45.00
67.50
90.00
Time (Hours)
00:30
01:00
01:30
02:00
02:30
03:00
03:30
04:00
04:30
05:00
05:30
06:00
06:30
07:00
07:30
08:00
08:30
09:00
09:30
10:00
10:30
11:00
11:30
12:00
12:30
13:00
13:30
14:00
14:30
15:00
15:30
16:00
16:30
17:00
17:30
18:00
18:30
19:00
19:30
20:00
20:30
21:00
21:30
22:00
22:30
23:00
23:30
00:00
90kW Load
Demand which can
be met with the
stored energy.
Energy which can be
stored in Batteries.
Demand which can
be met with the
stored energy.

15. LOAD AND PV CURVES FOR 100% ROOFTOP PV POTENTIAL
ENERGY STORAGE SOLUTION PROPOSAL
Power(kW)
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
110.00
120.00
Time (Hours)
00:30
01:00
01:30
02:00
02:30
03:00
03:30
04:00
04:30
05:00
05:30
06:00
06:30
07:00
07:30
08:00
08:30
09:00
09:30
10:00
10:30
11:00
11:30
12:00
12:30
13:00
13:30
14:00
14:30
15:00
15:30
16:00
16:30
17:00
17:30
18:00
18:30
19:00
19:30
20:00
20:30
21:00
21:30
22:00
22:30
23:00
23:30
00:00
120kW Load
Demand which can
be met with the
stored energy.
Energy which can be
stored in Batteries.
Demand which can
be met with the
stored energy.

16. BATTERY SIZING
ENERGY STORAGE SOLUTION PROPOSAL
60kW 90kW 120kW
01:00 0.00 0.00 0.00 20.366 0.00 0.00 0.00
02:00 0.00 0.00 0.00 22.202 0.00 0.00 0.00
03:00 0.00 0.00 0.00 22.95 0.00 0.00 0.00
04:00 0.00 0.00 0.00 21.25 0.00 0.00 0.00
05:00 0.00 0.00 0.00 22.644 0.00 0.00 0.00
06:00 0.00 0.00 0.00 21.114 0.00 0.00 0.00
07:00 5.70 8.55 11.20 19.448 0.00 0.00 0.00
08:00 12.05 18.07 23.66 20.162 0.00 0.00 3.50
09:00 21.11 31.67 41.47 22.474 0.00 9.20 19.00
10:00 34.12 51.18 67.02 25.126 8.99 26.06 41.90
11:00 32.79 49.19 64.41 25.908 6.88 23.28 38.51
12:00 30.40 45.59 59.71 22.984 7.41 22.61 36.72
13:00 33.50 50.25 65.80 22.61 10.89 27.64 43.19
14:00 34.55 51.83 67.87 28.288 6.26 23.54 39.58
15:00 39.98 59.97 78.54 27.608 12.37 32.37 50.93
16:00 43.19 64.79 84.85 26.35 16.84 38.44 58.50
17:00 22.73 34.10 44.65 25.024 0.00 9.07 19.62
18:00 17.87 26.81 35.11 23.426 0.00 3.39 11.68
19:00 5.17 7.75 10.15 23.494 0.00 0.00 0.00
20:00 0.00 0.00 0.00 23.426 0.00 0.00 0.00
21:00 0.00 0.00 0.00 21.59 0.00 0.00 0.00
22:00 0.00 0.00 0.00 22.066 0.00 0.00 0.00
23:00 0.00 0.00 0.00 20.23 0.00 0.00 0.00
00:00 0.00 0.00 0.00 22.168 0.00 0.00 0.00
69.67 215.59 363.14
92 285 480
Excess Generation(60
kW) (in kWh)
Excess Generation(90
kW) (in kWh)
Excess Generation(120
kW) (in kWh)
Total
Rated Battery Bank (@90%DOD) (in kWh)
Time
Generation
Load (kW)
For all three cases – 50%, 75% and 100%
rooftop PV Plant potential, the rated Battery
Bank capacities working at 90% DOD (Depth of
Discharge) is derived as 92kWh, 285kWh,
480kWh.

17. FINANCIAL FEASIBILITY
ENERGY STORAGE SOLUTION PROPOSAL
The battery size with respect to the PV Plant Capacity
follows a linear trend as the excess generation (kWh) is
additive as the PV plant capacity increases. Hence, the
proposed solution, 75kW-189 kWh is in line with
customer’s investment budget of INR 1 Cr.
The energy requirement of the facility is catered by
Diesel and Solar + Battery system. Diesel Gensets will
only be used to supplement for additional power.
For the proposed solution the expected time of recovery
is ~ 5 Years.
Scenarios (PV - Battery) 60kW - 92kWh 90kW - 285kWh 120 kW - 480kWh 75kW - 189kWh
Running Load (kW) 27 27 27 27
Operation Hours 24 24 24 24
Energy Consumed in 1 day 648 648 648 648
Energy Supplied by PV (kWh) 252 378 504 315
Energy Supplied by DG Set 396 270 144 333
Energy Storage Components
PV Plant (in kW) 16,50,000 24,75,000 33,00,000 21,00,000
Inverter (in kW) 10,00,000 13,00,000 15,00,000 63,20,000
Rated Battery Bank (in kWh) 31,20,000 95,20,000 1,66,00,000 14,00,000
Installation Cost 2,40,000 3,60,000 4,80,000 3,00,000
Total 60,10,000 1,36,55,000 2,18,80,000 1,01,20,000
Expected Inflation Rate 10% 10% 10% 10%
DG Set Cost 5,00,000 5,00,000 5,00,000 5,00,000
Yearly Diesel Cost (Without ESS) 45,36,000 45,36,000 45,36,000 45,36,000
Yearly Diesel Cost (With ESS) 27,72,000 18,90,000 10,08,000 23,31,000
Yearly Savings (With ESS) 17,64,000 26,46,000 35,28,000 22,05,000
Total Savings at end of Year 1 17,55,152 25,56,970 33,58,789 21,56,061
Total Savings at end of Year 2 35,90,486 52,34,213 68,77,940 44,12,350
Total Savings at end of Year 3 55,10,010 80,37,742 1,05,65,474 67,73,877
Total Savings at end of Year 4 73,66,420 1,08,22,357 1,42,78,293 90,94,390
Total Savings at end of Year 5 93,15,651 1,37,46,202 1,81,76,754 1,15,30,928
Total Savings at end of Year 6 1,13,62,343 1,68,16,240 2,22,70,138 1,40,89,292
Investment
Diesel GenSet
Time of Recovery (with 10% return discount)

18. PROPOSED SOLUTION
ENERGY STORAGE SOLUTION PROPOSAL
SOLAR PANELS BATTERY INVERTER
75kW 189kWh 70kW

19. THANK YOU