How much energy do solar panels produce in Vialonga?

A 5 kWp solar panel system in Vialonga, Portugal produces approximately 7,965 kWh per year, based on EU PVGIS data.

How much can you save with solar panels in Vialonga?

A 5 kWp system without battery saves approximately €707 per year (accounting for 18% self-consumption and feed-in tariff for surplus). The payback period is 7.8 years.

What is the optimal panel angle in Vialonga?

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

Solar Panels in Vialonga

Portugal · 38.87°N, 9.08°W

Solar Potential

Very Good

1,593 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

7,965kWh

Net Annual Savings

€707

Payback Period

7.8 yrs

25-Year Net

€16,309

Savings Breakdown

Self-consumed (18% of 7,965 kWh)1,434 kWh × 0.220 €/kWh

→ Savings from own usage+€315

Injected to grid (82% of production)6,531 kWh × 0.060 €/kWh

→ Feed-in revenue+€392

Net Annual Savings€707

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

493 kWh

534 kWh

674 kWh

710 kWh

787 kWh

775 kWh

855 kWh

851 kWh

749 kWh

607 kWh

475 kWh

455 kWh

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Month	Energy (kWh)	Irradiation (kWh/m²)
January	493	118
February	534	130
March	674	167
April	710	181
May	787	204
June	775	203
July	855	226
August	851	226
September	749	196
October	607	155
November	475	117
December	455	110
Total	7,965	2,034

Environmental Impact

CO2 Saved Per Year

1,856 kg

Equivalent Trees Planted

84 trees

Optimal Panel Angle

34° tilt

Technical Details

Data Source: EU PVGIS v5.3
Coordinates: 38.87206°N, 9.07805°W
System Loss: 14%
Optimal Inclination: 34°
Optimal Azimuth: 4°
Yearly Irradiation: 2034 kWh/m2
Retail Electricity Price: 0.220 EUR/kWh
Feed-in Tariff: 0.060 EUR/kWh
Install Cost: 1,100 EUR/kWp

€1,776

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