Solar vs other ways to use the same money
If you had €6,700 to spend, how does solar compare to a savings account, government bonds or the stock market? An honest, number-based comparison over 15 years.
What it does
An honest, number-based comparison of putting €6,700 into a 5 kWp solar system versus a savings account, Portuguese government bonds or the stock market over 15 years. The full tool lets you try other amounts (€4,200 or €9,800) too.
- Real annual return rates for each option, no sales spin
- Compares value after 15 years, side by side
- Explains why solar wins on risk even when stocks win on paper
Create a free account to use the full Investment Comparison tool — your answers and results are saved to your dashboard.
Create free accountExample — value after 15 years on €6,700
Try €4,200 and €9,800 system sizes in the full tool.
Other free tools you might find useful
No signup, no installer pitches. Just honest, independent resources for solar in Northern Portugal.
Get your free 2026 solar guide for Northern Portugal
Create a free account to unlock your personal guide and save your tool results to a dashboard. No spam, no installer calls, no obligation.
See what’s inside the guide