How much energy do solar panels produce in Eiras?

A 5 kWp solar panel system in Eiras, Portugal produces approximately 7,289 kWh per year, based on EU PVGIS data.

How much can you save with solar panels in Eiras?

A 5 kWp system without battery saves approximately €671 per year (accounting for 20% self-consumption and feed-in tariff for surplus). The payback period is 8.2 years.

What is the optimal panel angle in Eiras?

The optimal tilt angle for solar panels in Eiras is 35 degrees facing 4 degrees from south.

Solar Panels in Eiras

Portugal · 40.25°N, 8.42°W

Solar Potential

Very Good

1,458 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

7,289kWh

Net Annual Savings

€671

Payback Period

8.2 yrs

25-Year Net

€15,306

Savings Breakdown

Self-consumed (20% of 7,289 kWh)1,458 kWh × 0.220 €/kWh

→ Savings from own usage+€321

Injected to grid (80% of production)5,831 kWh × 0.060 €/kWh

→ Feed-in revenue+€350

Net Annual Savings€671

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

457 kWh

497 kWh

603 kWh

636 kWh

718 kWh

696 kWh

792 kWh

786 kWh

686 kWh

553 kWh

431 kWh

436 kWh

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Month	Energy (kWh)	Irradiation (kWh/m²)
January	457	110
February	497	122
March	603	150
April	636	163
May	718	187
June	696	184
July	792	211
August	786	210
September	686	181
October	553	141
November	431	106
December	436	105
Total	7,289	1,869

Environmental Impact

CO2 Saved Per Year

1,698 kg

Equivalent Trees Planted

77 trees

Optimal Panel Angle

35° tilt

Technical Details

Data Source: EU PVGIS v5.3
Coordinates: 40.24827°N, 8.41549°W
System Loss: 14%
Optimal Inclination: 35°
Optimal Azimuth: 4°
Yearly Irradiation: 1869 kWh/m2
Retail Electricity Price: 0.220 EUR/kWh
Feed-in Tariff: 0.060 EUR/kWh
Install Cost: 1,100 EUR/kWp

€1,643

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