How much energy do solar panels produce in Custoias?

A 5 kWp solar panel system in Custoias, Portugal produces approximately 7,510 kWh per year, based on EU PVGIS data.

How much can you save with solar panels in Custoias?

A 5 kWp system without battery saves approximately €667 per year (accounting for 18% self-consumption and feed-in tariff for surplus). The payback period is 8.2 years.

What is the optimal panel angle in Custoias?

The optimal tilt angle for solar panels in Custoias is 34 degrees facing -7 degrees from south.

Solar Panels in Custoias

Portugal · 41.11°N, 7.32°W

Solar Potential

Very Good

1,502 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

7,510kWh

Net Annual Savings

€667

Payback Period

8.2 yrs

25-Year Net

€15,065

Savings Breakdown

Self-consumed (18% of 7,510 kWh)1,352 kWh × 0.220 €/kWh

→ Savings from own usage+€297

Injected to grid (82% of production)6,158 kWh × 0.060 €/kWh

→ Feed-in revenue+€370

Net Annual Savings€667

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

391 kWh

524 kWh

656 kWh

684 kWh

765 kWh

758 kWh

852 kWh

837 kWh

723 kWh

576 kWh

402 kWh

342 kWh

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Month	Energy (kWh)	Irradiation (kWh/m²)
January	391	93
February	524	127
March	656	162
April	684	174
May	765	199
June	758	202
July	852	231
August	837	226
September	723	190
October	576	146
November	402	98
December	342	82
Total	7,510	1,932

Environmental Impact

CO2 Saved Per Year

1,750 kg

Equivalent Trees Planted

80 trees

Optimal Panel Angle

34° tilt

Technical Details

Data Source: EU PVGIS v5.3
Coordinates: 41.1053°N, 7.32097°W
System Loss: 14%
Optimal Inclination: 34°
Optimal Azimuth: -7°
Yearly Irradiation: 1932 kWh/m2
Retail Electricity Price: 0.220 EUR/kWh
Feed-in Tariff: 0.060 EUR/kWh
Install Cost: 1,100 EUR/kWp

€1,653

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