Choosing to install solar panels is more than an ecological decision — it’s a technical, financial, and strategic decision.
But before signing contracts or accepting quotes, there are fundamental questions you should clarify.
In this article, we help you ask the right questions and, above all, get clear answers.
1. Does my home have good conditions for installation?
It may seem simple, but many forget to assess:
- Roof orientation and tilt
- Shadows from buildings or trees
- Condition of the structure (tiles, waterproofing)
An initial technical assessment helps determine whether the installation will be efficient or if adaptations are needed.
2. Do I know my energy consumption?
Before knowing how many panels you need, you should understand:
- Your average daily/monthly consumption (in kWh)
- The times of day you consume the most (morning? night?)
With this data, it’s possible to correctly size the system — neither too much nor too little.
3. Is it worth including a battery?
A battery can increase self-consumption and allow you to use solar energy at night, but it comes with a slightly higher upfront cost.
Ideal for those who:
- Spend many hours away from home during the day
- Want greater energy independence
- Live in areas with frequent power outages
4. Am I eligible for subsidies or tax benefits?
Currently, there are no active incentives from the Environmental Fund or reduced VAT for this type of installation.
However, by installing the system with a certified company like Roteiro do Saber, your installation will be properly certified and eligible to apply as soon as new support lines or tax benefits are available.
This ensures that you invest today in a safe, compliant system without missing the opportunity to benefit from future incentives.
5. Is the installation company certified?
Not all companies on the market meet the legal requirements to install self-consumption systems.
Before accepting a proposal, check if the company:
- Has technicians certified by DGEG
- Offers online system monitoring
- Provides maintenance and technical support
6. How will the connection to the grid be made?
If you choose self-consumption with sale to the grid, it is necessary to:
- Submit a notification to DGEG
- Have a contract with an electricity supplier to sell excess energy
- Have a bidirectional meter
It may seem complex, but with the right guidance, the entire process can be simplified.
7. How long until I start saving?
This depends on several factors:
- Total cost of installation
- Amount of support received
- Percentage of self-consumption
On average, the return on investment ranges between 5 and 8 years, and panels last around 25 years.
Conclusion
Installing solar panels is a worthwhile investment, but only if done with information, planning, and technical support.
At Roteiro do Saber, we believe the right energy starts with the right question. We’re here to help you answer them all.
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