How much energy do solar panels produce in Oeiras?

A 5 kWp solar panel system in Oeiras, Portugal produces approximately 8,101 kWh per year, based on EU PVGIS data.

How much can you save with solar panels in Oeiras?

A 5 kWp system without battery saves approximately €719 per year (accounting for 18% self-consumption and feed-in tariff for surplus). The payback period is 7.6 years.

What is the optimal panel angle in Oeiras?

The optimal tilt angle for solar panels in Oeiras is 34 degrees facing 4 degrees from south.

Solar Panels in Oeiras

Portugal · 38.69°N, 9.31°W

Solar Potential

Excellent

1,620 kWh per kWp installed capacity

Your Solar Savings Estimate

Configure system size and battery to see realistic savings

Data last updated: March 2026

System Size

Battery Storage

Annual Output

8,101kWh

Net Annual Savings

€719

Payback Period

7.6 yrs

25-Year Net

€16,683

Savings Breakdown

Self-consumed (18% of 8,101 kWh)1,458 kWh × 0.220 €/kWh

→ Savings from own usage+€321

Injected to grid (82% of production)6,643 kWh × 0.060 €/kWh

→ Feed-in revenue+€399

Net Annual Savings€719

Installation cost (5 kWp × 1,100 €/kWp)€5,500

Portugal Solar Policy

UPAC system: surplus at 90% of MIBEL market price (~€0.04-0.08/kWh). 23% VAT (6% temporary rate expired July 2025).

Source: ERSE, Eurostat H1 2025

The savings estimates shown are for informational purposes only and do not constitute financial advice. Actual savings depend on your specific installation, roof condition, shading, consumption patterns, and future electricity price changes. Feed-in tariffs and regulations change frequently. Always obtain quotes from certified installers and consult a financial advisor before making investment decisions.

Monthly Energy Production

502 kWh

537 kWh

679 kWh

740 kWh

810 kWh

793 kWh

861 kWh

854 kWh

762 kWh

613 kWh

483 kWh

469 kWh

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Month	Energy (kWh)	Irradiation (kWh/m²)
January	502	120
February	537	130
March	679	167
April	740	187
May	810	207
June	793	204
July	861	222
August	854	221
September	762	196
October	613	154
November	483	118
December	469	112
Total	8,101	2,040

Environmental Impact

CO2 Saved Per Year

1,888 kg

Equivalent Trees Planted

86 trees

Optimal Panel Angle

34° tilt

Technical Details

Data Source: EU PVGIS v5.3
Coordinates: 38.69105°N, 9.31085°W
System Loss: 14%
Optimal Inclination: 34°
Optimal Azimuth: 4°
Yearly Irradiation: 2040 kWh/m2
Retail Electricity Price: 0.220 EUR/kWh
Feed-in Tariff: 0.060 EUR/kWh
Install Cost: 1,100 EUR/kWp

€1,786

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