How much energy do solar panels produce in Cascais?

A 5 kWp solar panel system in Cascais, Portugal produces approximately 8,281 kWh per year, based on EU PVGIS data.

How much can you save with solar panels in Cascais?

A 5 kWp system without battery saves approximately €735 per year (accounting for 18% self-consumption and feed-in tariff for surplus). The payback period is 7.5 years.

What is the optimal panel angle in Cascais?

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

Solar Panels in Cascais

Portugal · 38.70°N, 9.42°W

Solar Potential

Excellent

1,656 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

8,281kWh

Net Annual Savings

€735

Payback Period

7.5 yrs

25-Year Net

€17,176

Savings Breakdown

Self-consumed (18% of 8,281 kWh)1,491 kWh × 0.220 €/kWh

→ Savings from own usage+€328

Injected to grid (82% of production)6,790 kWh × 0.060 €/kWh

→ Feed-in revenue+€407

Net Annual Savings€735

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

503 kWh

544 kWh

691 kWh

759 kWh

832 kWh

815 kWh

887 kWh

881 kWh

784 kWh

626 kWh

490 kWh

468 kWh

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Month	Energy (kWh)	Irradiation (kWh/m²)
January	503	120
February	544	131
March	691	168
April	759	188
May	832	208
June	815	205
July	887	222
August	881	221
September	784	197
October	626	155
November	490	118
December	468	111
Total	8,281	2,044

Environmental Impact

CO2 Saved Per Year

1,929 kg

Equivalent Trees Planted

88 trees

Optimal Panel Angle

34° tilt

Technical Details

Data Source: EU PVGIS v5.3
Coordinates: 38.69681°N, 9.42147°W
System Loss: 14%
Optimal Inclination: 34°
Optimal Azimuth: 4°
Yearly Irradiation: 2044 kWh/m2
Retail Electricity Price: 0.220 EUR/kWh
Feed-in Tariff: 0.060 EUR/kWh
Install Cost: 1,100 EUR/kWp

€1,802

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