Australia

Sydney

2021/Dec

Economics

• Investment (after subsidies) = 2868 AUD
• NPV = 17138 AUD
• Payback = 2.8 years

PV system

• 27 panels
• 370 Wp per panel
• Potential installers: Rapid solar energy 

Author

• Tobias Jachnick
• tobias@jachnick.de
• linkedin

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Brazil

Curitiba

2022/Jan

Economics

• Investment = 7950 BRL
• NPV = 11003 BRL
• Payback = 8 years

PV system

• 10 panels
• 330 Wp per panel
• Potential installers:  

Author

• Marco Catanese
•  

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Chile

Las Condes, Santiago

2022/May

Economics

• Investment (after subsidies) = 9352 EUR
• NPV = 11067 EUR
• Payback = 8.9 years

PV system

• 18 panels
• 400 Wp per panel
• Potential installers: Punto Solar 

Author

• Leonor Farmhouse
• leonor.farmhouse@gmail.com
• linkedin

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Colombia

Bogotá

2021/Dec

Economics

• Investment = 5.3 million COP
• NPV = 4.7 million COP
• Payback = 6 years

PV system

• 3 panels
• 260 Wp per panel
• Potential installers: E&M 

Author

• Adriana Espinel
• 47512@novasbe.pt
• linkedin

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France

Bordeaux

2021/Dec

Economics

• Investment (after subsidies) = 16938 €
• NPV = 7150 €
• Payback = 15.5 years

PV system

• 24 panels
• 370 Wp per panel
• Potential installers: Effy 

Author

• Jean Sulzer
• 44001@novasbe.pt
• linkedin

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Germany

Aalen

2023/Dec

Economics

• Investment (after subsidies) = 3927 €
• NPV = 5538 €
• Payback = 3.2 years

PV system

• 5 panels
• 435 Wp per panel
• Potential installers: Idealo, Stadtwerke Gmund

Author

• Clemens Bernhard
• clemensbernhard@web.de
• linkedin

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Bonn

2022/Dec

Economics

• Investment (after subsidies) = 8961 €
• NPV = 5536 €
• Payback = 11.2 years

PV system

• 10 panels
• 395 Wp per panel
• Potential installers: SRW Energy 

Author

• Elias Thies
• eliasthies@t-online.de
• linkedin

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Düsseldorf

2021/Dec

Economics

• Investment (after subsidies) = 10622 €
• NPV = 13770 €
• Payback = 10.5 years

PV system

• 30 panels
• 330 Wp per panel
• Potential installers: Alpha solar 

Author

• Niklas Gerth
• niklas.gerth@t-online.de
• linkedin

More (pdf)

Frankfurt

2023/Dec

Economics

• Investment (after subsidies) = 15477 €
• NPV = 3562 €
• Payback = 15.9 years

PV system

• 11 panels
• 425 Wp per panel
• Potential installers: Zolar, Calosol, Klarsolar

Author

• Lorenz Wurzel
• 56069@novasbe.pt
• linkedin

More (pdf)

Hamburg

2021/Oct

Economics

• Investment (after subsidies) = 12872 €
• NPV = 4383 €
• Payback = 13.9 years

PV system

• 30 panels
• 330 Wp per panel
• Potential installers: EWE

Author

• Benedikt Becker
• benedikt.becker.pv@outlook.com

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Munich

2023/Dec

Economics

• Investment (after subsidies) = 12390 €
• NPV = 11871 €
• Payback = 9.8 years

PV system

• 29 panels
• 265 Wp per panel
• Potential installers: Svea solar, Klarsolar

Author

• Philipp Hauswurz
• 54597@novasbe.pt
• linkedin

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Greece

Thessaloniki

2023/Dec

Economics

• Investment (after subsidies) = 6427 €
• NPV = 3466 €
• Payback = 9.8 years

PV system

• 6 panels
• 300 Wp per panel
• Potential installers: elpedison, dei, nrg

Author

• Christina Lefkarou
• lefkarou.christina@outlook.com
• linkedin

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Italy

Florence

2021/Nov

Economics

• Investment (after subsidies) = 4378 €
• NPV = 5781 €
• Payback = 3.1 years

PV system

• 12 panels
• 445 Wp per panel
• Potential installers:  

Author

• Lupo Steinhauslin
• lupomsteinhauslin@gmail.com
• linkedin

More (pdf)

Genoa

2022/Apr

Economics

• Investment (after subsidies) = 2716 €
• NPV = 4586 €
• Payback = 9.5 years

PV system

• 4 panels
• 385 Wp per panel
• Potential installers: Otovo 

Author

• Riccardo Verona
• riccardoverona3@gmail.com
• linkedin

More (pdf)

Milan

2022/Apr

Economics

• Investment (after subsidies) = 2850 €
• NPV = 3415 €
• Payback = 12 years

PV system

• 4 panels
• 400 Wp per panel
• Potential installers: Wolmann 

Author

• Marco Tonna
• Tonna.marco25@gmail.com
• linkedin

More (pdf)

Padova

2024/May

Economics

• Investment (after subsidies) = 5160 €
• NPV = 7070 €
• Payback = 13 years

PV system

• 12 panels
• 430 Wp per panel
• Potential installers: 

Author

• Lorenzo de Chiara 
• 52576@novasbe.pt
• linked

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Porto Empedocle (AG)

2022/Apr

Economics

• Investment (after subsidies) = 2700 €
• NPV = 7863 €
• Payback = 4 years

PV system

• 3 panels
• 375 Wp per panel
• Potential installers: energit 

Author

• Renato Di Gangi
• renatodigangi@gmail.com
• linkedin

More (pdf)

Ravello

2024/May

Economics

• Investment (after subsidies) = 9255 €
• NPV = 10297 €
• Payback = 11 years

PV system

• 15 panels
• 435 Wp per panel
• Potential installers: Enel X, Iren 

Author

• Riccardo Ioimo
• ioimo.riccardo@gmail.com
• linkedin

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Rome

2022/Jan

Economics

• Investment (after subsidies) = 3360 €
• NPV = 3664 €
• Payback = 12 years

PV system

• 4 panels
• 400 Wp per panel
• Potential installers: Benext 

Author

• Giuseppe Paiano
• 44638@novasbe.pt
• linkedin

More (pdf)

Luxembourg

Luxembourg

2022/Dec

Economics

• Investment (after subsidies) = 12400 €
• NPV = 10447 €
• Payback = 11.8 years

PV system

• 25 panels
• 400 Wp per panel
• Potential installers: Topsolar AS 

Author

• Simon Ziegler
• simon.z7@web.de
• personal website

More (pdf)

Norway

Olso

2024/May

Economics

• Investment (after subsidies) =  €
• NPV = -3230 € (Negative NPV! Investment is not recommended.)
• Payback = 29 years (not discounted)

PV system

• 12 panels
• 580 Wp per panel
• Potential installers: Solcelle 

Author

• Le An Tran
• leantranx@gmail.com
• personal website

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Portugal

Carcavelos

2021/Dec

Economics

• Investment (after subsidies) = 427 €
• NPV = 7109 €
• Payback = 1.8 years

PV system

• 4 panels
• 350 Wp per panel
• Potential installers: edp 

Author

• João Pereira
• joao.pereira@novasbe.pt
• personal website

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Faro

2021/Dec

Economics

• Investment (after subsidies) = 468 €
• NPV = 10914 €
• Payback = 2 years

PV system

• 6 panels
• 380 Wp per panel
• Potential installers: edp 

Author

• António Lima
• antonio.de.castilho.lima@gmail.pt 
• linkedin

More (pdf)

Lisboa

2022/Dec

Economics

• Investment (after subsidies) = 1445 €
• NPV = 6092 €
• Payback = 3.4 years

PV system

• 8 panels
• 390 Wp per panel
• Potential installers: Otovo 

Author

• Jéssica Gonçalves
• jessgoncalves@outlook.pt
• linkedin

More (pdf)

Montijo

2024/May

Economics

• Investment (after subsidies) = 2128 €
• NPV = 5614 €
• Payback = 6.1 years

PV system

• 6 panels
• 380 Wp per panel
• Potential installers: Iberdrola, EDP 

Author

• Jayanti Hazra
• 45720@novasbe.pt
• linkedin

More (pdf)

Peso da Régua

2023/Dec

Economics

• Investment (after subsidies) = 1500 €
• NPV = 4749 €
• Payback = 2.3 years

PV system

• 5 panels
• 410 Wp per panel
• Potential installers: sunenergy, edp, Iberdrola 

Author

• Sofia Tomás
• sofiamariatomas@hotmail.com

More (pdf)

Portimão

2022/Dec

Economics

• Investment (after subsidies) = 1902 €
• NPV = 7256 €
• Payback = 4.2 years

PV system

• 9 panels
• 380 Wp per panel
• Potential installers: Goldenergy 

Author

• Bruno Lázaro
• 48230@novasbe.pt
• linkedin

More (pdf)

Porto

2022/Dec

Economics

• Investment (after subsidies) = 1195 €
• NPV = 6201 €
• Payback = 2.1 years

PV system

• 8 panels
• 375 Wp per panel
• Potential installers: Sunenergy 

Author

• Tomás Carvalho
• tomasgcarvalho2000@gmail.com
• linkedin

More (pdf)

Spain

Barcelona

2022/Dec

Economics

• Investment = 7207 €
• NPV = 9229 €
• Payback = 8.1 years

PV system

• 9 panels
• 450 Wp per panel
• Potential installers: Iberdrola 

Author

• João Pinto
• joaobpinto11@gmail.com
• linkedin

More (pdf)

Sweden

Stockholm

2023/Dec

Economics

• Investment (after subsidies) = 115614 SEK
• NPV = 133730 SEK
• Payback = 10.2 years

PV system

• 26 panels
• 375 Wp per panel
• Potential installers: HemSol, Solar Power Solutions, Ecokraft  

Author

• Matilde Mourão Costa
• matilde_m_costa@live.com.pt
• linkedin

More (pdf)

Switzerland

Zurich

2022/Feb

Economics

• Investment (after subsidies) = 16607 CHF
• NPV = 4383 CHF
• Payback = 25 years

PV system

• 27 panels
• 390 Wp per panel
• Potential installers: Stahlin 

Author

• Sven Hatzfeld
• sven.hatzfeld@web.de
• linkedin

More (pdf)

United Arab Emirates

Dubai

2023/Dec

Economics

• Investment = 49950 AED
• NPV = 41236 AED
• Payback = 10.8 years

PV system

• 18 panels
• 555 Wp per panel
• Potential installers: Al Shirawi Solar, 3D 

Author

• Maria Leonor Neto
• Leonor.neto@hotmail.com
• linkedin

More (pdf)

United Kingdom

London

2021/Dec

Economics

• Investment = 2400 GBP
• NPV = 2979 GBP
• Payback = 16 years

PV system

• 6 panels
• 265 Wp per panel
• Potential installers: Light renewables 

Author

• Vlad Cristea
• vlad.cristea@novasbe.pt
• linkedin

More (pdf)

For more details on how we estimate these numbers, please read the How page.