How much energy do solar panels produce in Viseu?

A 5 kWp solar panel system in Viseu, Portugal produces approximately 7,514 kWh per year, based on EU PVGIS data.

How much can you save with solar panels in Viseu?

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 Viseu?

The optimal tilt angle for solar panels in Viseu is 35 degrees facing -1 degrees from south.

Solar Panels in Viseu

Portugal · 40.66°N, 7.91°W

Solar Potential

Very Good

1,503 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

7,514kWh

Net Annual Savings

€667

Payback Period

8.2 yrs

25-Year Net

€15,074

Savings Breakdown

Self-consumed (18% of 7,514 kWh)1,352 kWh × 0.220 €/kWh

→ Savings from own usage+€298

Injected to grid (82% of production)6,161 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

466 kWh

515 kWh

631 kWh

652 kWh

734 kWh

722 kWh

824 kWh

817 kWh

705 kWh

571 kWh

443 kWh

433 kWh

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Month	Energy (kWh)	Irradiation (kWh/m²)
January	466	111
February	515	125
March	631	156
April	652	166
May	734	191
June	722	192
July	824	222
August	817	220
September	705	186
October	571	145
November	443	108
December	433	103
Total	7,514	1,925

Environmental Impact

CO2 Saved Per Year

1,751 kg

Equivalent Trees Planted

80 trees

Optimal Panel Angle

35° tilt

Technical Details

Data Source: EU PVGIS v5.3
Coordinates: 40.66165°N, 7.90905°W
System Loss: 14%
Optimal Inclination: 35°
Optimal Azimuth: -1°
Yearly Irradiation: 1925 kWh/m2
Retail Electricity Price: 0.220 EUR/kWh
Feed-in Tariff: 0.060 EUR/kWh
Install Cost: 1,100 EUR/kWp

€1,594

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