The ultimate list of 39 Solar Energy case studies

See how people and organizations save annually with solar energy

The adoption of solar energy in the world is growing at a rapid pace in the world.

More and more consumers, businesses and governmental organizations are considering solar energy.

But it can be sometimes difficult to convince your family, friends, boss or colleagues to adopt solar energy?

To make it easier to convince people to adopt solar power we selected the best and most complete 39 solar energy case studies.

The case studies included in this list contain key information about the return on investment and annual savings of solar energy systems built all over the world and different sizes.

The list is divided in three categories; Residential Solar Energy, Commercial Solar Energy and Public Sector Energy. 

 

Residential Solar Energy

1. Home Lavallee Family

Country: Cumberland, Rhode Island, United States
Installer: Renewable Energy Service of New England Inc.
Solar PV: Suniva
Inverter: Enphase
Size: 9.5 kW
Return on Investment: 34.9%
Annual Savings: $3845

RES installed 33 solar modules for the Lavallee Family. The projected return of investment is 6 years.

Read case study (http://www.energysage.com/project/7085/cumberland-solar-pv/)

2. Home Middle Franconia

Country: Bavaria, Germany
Inverters: SMA
Size: 5 kWp
Cost reduction: €875 per year

One family of five installed a solar energy system with batteries. The whole system included a SMA pv inverter, a SMA battery inverter and a SMA sunny home manager for system monitoring and energy management.

Read case study (http://www.sma.de/en/home-systems/user-story-solar-system-smart-2.html)

3. Home Götz Family

Country: Wetzlar-Hermannstein, Germany
Installer: Gecko Logic
Solar PV: Yingli
Inverters: SMA
Size: 8.5 kWp
Cost Reduction: €3936 per year

A colleague convinced the family to invest in solar energy. The solar modules exceed the predicted energy yield. This system was installed by Gecko Logic.

Read case study 
(http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/Yingli_CS_Goetz_EN_062011-1.pdf)

4. Home Tan Family

Country: Jalan Kelawar, Tanglin, Singapore
Installer: ReZeca Renewables
Solar PV: Yingli Solar
Size: 18.6 kWp
Estimated Annual Savings: SGD$6000

The Tan Family wanted to reduce their footprint and their energy bills. In total 62 solar panels were installed.

Read case study (http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/AseanCaseStudy_Singapore_Residential_Tanglin-v2.pdf)

5. Home Pappalardo Family

Country: Viagrande, Italy
Installer: Etnergia
Solar PV: Yingli
Inverters: SMA
Size: 8.58 kW
Cost Reduction: €5533 per year

After seeing solar pv installation in other countries the family decided to switch to solar energy. The company Etnergia installed 39 solar panels on roof with south-east orientation. The system is performing better than expected.

Read case study (http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/Yingli_CS_Goetz_EN_062011-1.pdf)

6. Wood Edge Apartments

Country: Hempstead, New York, United States
Installer: Sunrise Solar Solutions
Size: 50 kW
Savings over system life: $545 899

Wood Edge Apartments is an affordable housing project. The building is located near the Atlantic Ocean and already survived two hurricanes and is working perfectly. The mounting system is a hybrid ballast/attached system.

Read case study (http://www.sunrisesolarllc.com/commercial-solar/case-studies/item/4-woods-edge-apartments)

 

Commercial Solar Energy

7. Absolute Coatings

Country: New Rochelle, New York, United States
Installer: Sunrise Solar Solutions
Inverter: Enphase
Size: 82 kW
Savings over system life: $442 866

Sunrise Solar Solutions designed and installed 313 solar modules for Absolute Coatings on a new roof. The mounting system is ballast only. This project is part of 200 kW solar energy system that will completed in a next phase.

Read case study (http://www.sunrisesolarllc.com/commercial-solar/case-studies/item/1-absolute-coatings)

8. Birkhof Horse Stables and Riding School

Country: Waldsoms, Germany
Installer: Gecko Logic
Solar PV: Yingli
Inverters: SMA
Size: 34.68 kWp
Cost Reduction: €12 954

Birkhof choose for solar energy, because of environmental and cost reduction reasons. Gecko Logic installed the system in 2008.

Read case study (http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/Yingli_CS_Birkhof_EN_062011-1.pdf)

9. Ryan and Ryan Insurance

Country: Kingston, New York, United States
Installer: Sunrise Solar Solutions
Solar PV: Conergy
Inverter: Enphase
Size: 16.3 kW
Savings over lifetime system: $69 654
Years to breakeven: 5.9

The roof of Ryan and Ryan Insurance was big enough to place enough solar panels to cover their whole energy consumption. The solar panels are mounted with a fully ballasted racking system.

Read case study (http://www.sunrisesolarllc.com/commercial-solar/case-studies/item/3-ryan-and-ryan-insurance)

10. Powerplant Poggiorsini

Country: Poggiorsini (Bari), Italy
Installer: SAEM Company
Solar PV: Yingli
Inverters: Siel
Size: 3 MWp
Return: €1 412 000 per year

The solar power plant was built by SAEM Company and is made up of 13 500 units. The plant is oriented to the south. The plant produces enough energy to power the homes of 1500 families.

Read case study (http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/Yingli_CS_Centrale-Poggiorsini_EN_062011-1.pdf)

11. Huerto Solar Villar de Cañas II

Country: Villar de Cañas, Spain
Installer: CYMI
Solar PV: Yingli
Inverters: Siemens
Size: 9.8 MWp
Return: €6 336 000 per year

Prosolcam bought a 22 hectare site to invest in solar energy. The company CYMI designed and installed the system that consist of 56 180 pv modules. The plant has an south facing orientation.

Read case study (http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/Yingli_CS_VillaDeCanas_EN_062011-1.pdf)

12. Amcorp Gemas Solar Plant

Country: Gemas, Negeri Sembilan, Malaysia
Installer: Amcorp Power Sdn. Bhd.
Solar PV: Yingli
Size: 10 269 MWp
Return: MYR 11.88 million (about $2.6 million)

Amcorp Power is a solar farm developer in Malaysia. The solar plant has a power purchase agree with Tenaga Nasional Berhad for 21 years. The plant that consists of 41 076 pv modules, produces enough energy for 3315 residential homes.

Read Case Study (http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/AseanCaseStudy_Malaysia_Solarfarm_10MW%20Amcorp%20Gemas_v4.pdf)

13. Jackson Enterprise LLC

Country: California, United States
Installer: CM Solar Electric
Solar PV: Sunpower, LG
Inverter: SMA
Size: 26kW
Average Annual Savings: $11 556
Return on Investment: 23.6%

The solar energy system provides at least 100% or more of the energy consumption of the building. And the total net investment of the system was $49 000.

Read case study (https://www.energysage.com/project/6762/jackson-enterprise-llc/)

14. Diab Engineering

Country: Geraldton, Australia
Installer: Infinite Energy
Solar PV: Conergy
Inverter: SMA
Size: 100 kW
Year 1 return on investment: 34%
10 Year Net Present Value: $139 000
Annual Savings: $41 000

Diab Engineering choose Infinite Energy to install a solar energy system on there roof of their workshop. Diab Engineering used government funded solar programmes to finance their system.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies/manufacturing-engineering-transportation/diab-engineering)

15. GAL Manufacturing

Country: New York,United States
Installer: Solar City
Size: 237 kW
Annual Savings: $50 000

GAL Manufacturing is a family owned company that builds elevator parts. The system will generate almost half of the buildings energy consumption. The project is partly funded by government funds.

Read case study (http://www.solarcity.com/commercial/local-business-solar-projects/gal-manufacturing)

16. Hewlett Packard

Country: Palo Alto, California, United States
Size: 1 MW
Estimated Lifetime Savings: $1 million

HP installed 1 MW of solar modules on its roof. The system will provide 20% of the buildings usage. HP doesn’t own the system, but will purchase the energy produced from Solar City.

Read case study (http://www.solarcity.com/commercial/commercial-solar-projects/hp)

17. Velmade Prestige Sheet Metal

Country: Osborne Park, Australia
Installer: Infinite Energy
Solar PV: REC Solar
Inverter: SMA
Size: 31 kW
Year 1 return on investment: 18%
10 year Net Present Value: $7 400
Annual Savings: $8 500

In 2014 Velmade installed 120 solar modules on its roof. As a small-to-medium business it wanted to reduce its operating costs. The project is expected to payback in 5.3 years. Velmade used outside funding for its solar system.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies/manufacturing-engineering-transportation/velmade-prestige-sheet-metal)

18. Bella Ridge Winery

Country: Herne Hill, Australia
Installer: Infinite Energy
Solar PV: REC Solar
Inverter: SMA
Size: 40 kW
Year 1 return on investment: 21%
Annual Savings: $18 300

Bella Ridge Winery is a energy intensive company and was suffering of rising electricity prices in Australia. Infinite Energy installed 156 REC Solar modules on a ground mounted rack. The projected payback period is 4.4 years.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies/agriculture-produce-wineries/bella-ridge-winery)

19. Cheeky Brothers

Country: Osborne Park, Australia
Installer: Infinite Energy
Solar PV: REC Solar
Inverter: Fronius
Size: 40 kW
Year 1 return on investment: 28%
Annual Savings: $13 500

Cheeky Brothers is a Food company that installed 152 REC Solar panels on its roof. The system produces 28% of electricity consumption.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies-2/retail-hospitality/cheeky-brothers40kw/)

20. Seven Acres Business Park

Country: Suffolk, United Kingdom
Installer: Enviko
Solar PV: CSUN
Inverter: SMA
Size: 40 kW
Yearly Income and Savings: £8 079

This business park decided to install 120 solar panels on its roof just in time before feed in tariffs were reduced in 2012. The project was completed just in time by Enviko.

Rea case study (http://www.enviko.com/solar/case-studies/business-park)

21. Broad Oak Cider Farm

Country: Clutton Hill Industrial Park, Bristol, United Kingdom
Installer: Enviko
Solar PV: Conergy
Inverter: Solaredge
Size: 100 kW
Yearly Income and Savings: £15 894

Enviko helped Broad Oak Cider Farm install 400 solar panels that covered the whole roof of the building. Power optimizers were used to reduce the effects of shading on the panels.

Read case study (http://www.enviko.com/solar/case-studies/clutton-hill-industrial-park.php)

22. Glebar Inc.

Country: Franklin Lakes, New Jersey, United States
Installer: Solar Energy World
Solar PV: Schuco
Size: 55.5 kW
Yearly Savings: $8000

Glebar Inc was looking for a way to reduce its energy bills and reduce its carbon footprint. Solar Energy World helped achieving their goals. The system is partly funded with a tax break and Solar Renewable Energy Credits.

Read case study (https://www.solarenergyworld.com/commercial-solar-panels/business-case-studies/glebar-precision-grinding/)

23. Metuchen Sportscomplex

Country: Metuchen, New Jersey, United States
Installer: Solar Energy World
Solar PV: LG
Size: 312 kW
Yearly Savings: $33 397

The developer Recycland LLC decid to add Solar Energy to its building to reduce energy costs and to reduce its carbon footprint.

Read case study (https://www.solarenergyworld.com/commercial-solar-panels/business-case-studies/metuchen-sportsplex/)

24. Alfandre Architecture

Country: New Paltz, New York, United States
Installer: Sunrise Solar Solutions
Solar PV: Conergy and Hyunday
Inverter: Enphase
Size: 33.4 kW
Savings over lifetime system: $190 000

Alfandre Architecture is applying for the LEED GOLD Certification. Adding solar energy to the project is a logical step. Sunrise Solar Solutions did the installation of the new building.

Read case study (http://www.sunrisesolarllc.com/commercial-solar/case-studies/item/2-alfandre-architecture)

25. Ebay

Country: San Jose, California, United States
Installer: Solar City
Size: 650 kW
Annual Cost Savings: $100 000

Ebay wanted to make its campus in San Jose more sustainable. Solar City designed and installed the 3248 solar panel system on five different buildings located on the campus.

Read case study (http://www.solarcity.com/commercial/commercial-solar-projects/ebay)

26. Heritage Paper

Country: Livermore, California, United States
Installer: Solar City
Size: 528 kW
Annual Cost Savings: $26,950

Heritage Paper is the packaging supplier of big companies like Nordstrom and Cliff Bar. Their huge facility uses huge amounts of energy and installing solar panels was a no-brainer.

Read cases study (http://www.solarcity.com/sites/default/files/Comm_Case_151120_J4712_RC_V-01_HeritagePaper.pdf)

27. Batth Farms

Country: San Joaquin Valley, California, United States
Installer: Solar City
Size: 1.5 MW
Estimated lifetime savings: $9 000 000

The Batth farm uses a lot of energy for the irrigation of the land and running waterpumps. To reduce their operating costs Solar City installed a solar energy system on their farmland.

Read case study (http://www.solarcity.com/sites/default/files/Comm_Case_151120_J4712_RC_V-01_Batth.pdf)

28. Advance Auto Parts

Country: Enfield, Connecticut, United States
Installer: Solar City
Size: 1.17 MW
Annual Cost Savings: $100 000

Advance Auto Parts is a distribution company of after-sales auto parts. Solar City installed the solar system with little to no disruption to daily operations.

Read case study: (http://www.solarcity.com/commercial/commercial-solar-projects/advance-auto-parts)

29. Roofmart

Country: Kewdale, Australia
Installer: Infinite Energy
Solar PV: REC Solar
Inverter: SMA
Size: 100 kW
Year 1 Return on Investment: 25%
10 year Net Present Value: $103 200
Annual Savings: $37 600

Roofmart design, manufactures and distributes steel constructions that are used for garages, patios and sheds. The system was installed in december 2015 and the cost will be returned in under 4 years.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies-2/manufacturer/roofmart100kw/)

30. Imdex

Country: Osborne, Australia
Installer: Infinite Energy
Solar PV: Winaico
Inverter: SMA
Size: 100 kW
Year 1 Return on Investment: 32%
10 Net Present Value: $240 300
Annual Savings: $45 300

Imdex is listed on the ASX and produces and manufactures fluids and instruments for the mining, oil and gas industries. The projected payback period the solar energy system will be 3.1 years.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies-2/manufacturer/imdex100kw/)

 

Public Sector Solar Energy

31. AC Transit District

Country: California, United States
Installer: Sunpower

ACT Transit District is is Sunpower helped AC Transit District with the installation of two solar energy projects. The solar project in

Read case study (https://us.sunpower.com/sites/sunpower/files/media-library/case-studies/cs-cs-ac-transit-saves-energy-costs-sunpower-powerguard.pdf)

32. Department of Mines and Petroleum

Country: Carlisle, Australia
Installer: Infinite Energy
Solar PV: Winaico
Inverter: SMA
Size: 40 kW
Year 1 Return on Investment: 31%
10 Year Net Present Value: $69 200
Annual Savings: $15 400

Infinite Energy installed 153 solar panels on the roof of the Department of Mines and Petroleum. The projected return is 2.8 years.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies/government-local-council/department-of-mines-petroleum)

33. Sacred Hearts Academy

Country: Hawaii, United States
Installer: Hawaiian Energy Systems
Solar PV: Centrosolar America
Solar Inverter: Enphase
Size: 243 kW
Cost Reduction: 33% annually

Sacred Hearts Academy is a private school in Honolulu, Hawaii. Hawaiian Energy Systems inc. and Centrosolar America installed 1023 panels on three different sun orientations and was completed in 2013.

Read casestudy (https://centrosolaramerica.com/honolulus-sacred-hearts-academy-features-243kw-solar-pv-array/)

34. Ina Levine Jewish Community Center

Country: Arizona, United States
Installer: Green Choice Solar
Solar PV: Centrosolar America
Size: 1.3 MW
Cost reduction: $6.8 million lifetime system

The Ina Levine Jewish Community Center delivers services to the Scottsdale community. Green Choice Solar installed 5685 solar panels on two locations. One part of the panels was installed on the roof and the majority was installed on 400 carports.

Read casestudy (https://centrosolaramerica.com/1-3mw-solar-pv-solar-array-installed-at-ina-levine-jewish-community-center-jcc-in-arizona/)

35. Fire station Gifhorn

Country: Germany
Installer: Elektro Ohlhoff
Solar PV: Yingli Solar
Inverter: Kaco Powador
Size: 60.86 kWp
Cost Reduction: €25900

The roofs of the fire station in Gifhorn presented a perfect solar energy investment opportunity. It was an easy decision for the local government of Gifhorn.

Read case study (http://d9no22y7yqre8.cloudfront.net/assets/uploads/projects/downloads/Yingli_CS_FirestationGif_EN_062011-1.pdf)

36. University of Colorado

Country: Boulder, Colorado, United States
Installer: Eco Depot USA / Solarado Energy
Inverter: SatCon Technology Corporation
Size: 100 kW
Average Annual Savings: $21 750
Return on investment: 7.9%
In september 2009 the University of Colorado installed solar panels on a solar carport. This project was part of a LEED Platinum certificate process for which the University applied. The LEED platinum status is the highest green building status that can be achieved in the LEED program.

Read case study (https://www.energysage.com/project/6776/cu-boulder-100-kw-solar-carport/)

37. Rotary Residential College

Country: Kensington, Australia
Installer: Infinite Energy
Solar PV: REC Solar
Inverter: SMA
Size: 40 kW
Year 1 return on investment: 33%
10 year Net Present Value: $69 000
Annual Savings: $20 400

Rotary Residential College is a high-school with a lodging service to their students. Infinite Energy helped the Rotary Residential College with the installation of 153 REC solar panels on their roof.

Read case study (https://www.infiniteenergy.com.au/commercial/case-studies/education-medical/rotary-residential-college)

38. Solar Carport Santa Cruz

Country: Santa Cruz, California, United States
Installer: Swenson Solar
Size: 386 kW
Annual Savings: $73 000

The city of Santa Cruz choose Swenson Solar to build two solar carports with 834 and 936 solar panels installed on them.

Read case study (https://www.energysage.com/project/6728/municipal-solar-carport-in-santa-cruz/)

39. Hurstpierpoint College

Country: Hurstpierpoint, United Kingdom
Installer: Enviko
Solar PV: Conergy
Inverter: SMA
Size: 53.75 kW
Yearly Income and Savings: £10 151

Hurstpierpoint is a college home to more than 1000 students. The college wanted to reduce their energy bill and demonstrate their green credentials. The solar panels are installed on three different roofs. Because of the feed-in-tariff the cost of the installation will be recovered in 6 years.

Read case study (http://www.enviko.co.uk/solar/case-studies/hurstpierpoint-college)