European Solar Case Studies | Rooftop PV Payback Examples – SolarHomeTech

Solar success stories across Europe

From compact city homes to coastal villas, these snapshots show how the analyzer guides real-world decisions.

Istanbul, Turkey
Analyzer result Payback ≈ 4.3 years

Istanbul rooftop opportunity

An Istanbul apartment block mapped 7.8 kW, channeling 9.8 MWh into lifts, cooling, and EV fleets.

System Size 7.8 kW
Annual Yield 9.800 kWh/yr
Annual Savings € 2.400 /yr
Lifetime Value € 36.500
CO2 Offset 4.1 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Ankara, Turkey
Analyzer result Payback ≈ 4.6 years

Ankara rooftop opportunity

Ankara villas model 7 kW on flat roofs, delivering 9 MWh into daytime HVAC while banking generous export credits.

System Size 7.0 kW
Annual Yield 9.000 kWh/yr
Annual Savings € 2.150 /yr
Lifetime Value € 34.000
CO2 Offset 3.8 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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New York, United States
Analyzer result Payback ≈ 9.1 years

New York rooftop opportunity

A Brooklyn brownstone models 10.5 kW across two roof planes; PVWatts shows 12.5 MWh yearly under ConEd TOU rates.

System Size 10.5 kW
Annual Yield 12.500 kWh/yr
Annual Savings € 2.300 /yr
Lifetime Value € 43.000
CO2 Offset 5.2 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Los Angeles, United States
Analyzer result Payback ≈ 6.6 years

Los Angeles rooftop opportunity

On a Pasadena bungalow, a 9.6 kW array tracks 15.2 MWh annually, trimming peak TOU costs and charging two EVs.

System Size 9.6 kW
Annual Yield 15.200 kWh/yr
Annual Savings € 2.800 /yr
Lifetime Value € 52.000
CO2 Offset 6.3 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Austin, United States
Analyzer result Payback ≈ 6.9 years

Austin rooftop opportunity

East Austin ranch homes fit 8.8 kW arrays making 14 MWh; buyback credits plus tax incentives keep payback under seven years.

System Size 8.8 kW
Annual Yield 14.000 kWh/yr
Annual Savings € 2.450 /yr
Lifetime Value € 47.000
CO2 Offset 5.8 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Phoenix, United States
Analyzer result Payback ≈ 6.2 years

Phoenix rooftop opportunity

A Phoenix stucco roof tilts 9 kW south; PVWatts forecasts 16.5 MWh, dominating daytime cooling loads.

System Size 9.0 kW
Annual Yield 16.500 kWh/yr
Annual Savings € 2.550 /yr
Lifetime Value € 49.500
CO2 Offset 6.9 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Denver, United States
Analyzer result Payback ≈ 7.0 years

Denver rooftop opportunity

Denver row homes run 7.8 kW designs with 11.5 MWh output, riding high elevation sun and Xcel net-metering.

System Size 7.8 kW
Annual Yield 11.500 kWh/yr
Annual Savings € 1.950 /yr
Lifetime Value € 39.500
CO2 Offset 4.8 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Seattle, United States
Analyzer result Payback ≈ 7.4 years

Seattle rooftop opportunity

A Ballard craftsman fits 8 kW between dormers; cool temperatures keep efficiency high for 10 MWh per year.

System Size 8.0 kW
Annual Yield 10.000 kWh/yr
Annual Savings € 1.750 /yr
Lifetime Value € 34.000
CO2 Offset 4.2 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Miami, United States
Analyzer result Payback ≈ 6.7 years

Miami rooftop opportunity

A Miami two-story uses a 10 kW roof plus hurricane-rated racking; PVWatts shows 15 MWh covering year-round cooling.

System Size 10.0 kW
Annual Yield 15.000 kWh/yr
Annual Savings € 2.600 /yr
Lifetime Value € 48.000
CO2 Offset 6.0 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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Chicago, United States
Analyzer result Payback ≈ 7.5 years

Chicago rooftop opportunity

A Chicago two-flat runs 9.2 kW; PVWatts projects 11.8 MWh, trimming ComEd bills despite snowy winters.

System Size 9.2 kW
Annual Yield 11.800 kWh/yr
Annual Savings € 2.100 /yr
Lifetime Value € 38.000
CO2 Offset 5.0 tCO2/yr

Modeled with Solarhome tariffs and 2025 utility assumptions.

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