Make your solar journey safe, cost-effective and reliable.

With 3D Watt, you’ll discover the essential criteria for evaluating proposals and hiring the right solar installer for your project.

What Does a Solar Installer Do?

  • Consumption assessment: analysis of your site’s energy profile.

  • Sizing: calculating the ideal size of the solar PV system.

  • Generation simulation: estimating output based on real-world data.

  • Technical design: in line with legislation, ANEEL rules (Brazil’s national electricity regulator) and the distribution utility’s standards.

  • Equipment selection: specifying equipment, providing guidance and arranging finance.

  • Utility approval (homologação): handling the filings and meeting the requirements for a safe grid connection.

  • Warranty management: liaising with manufacturers and distributors.

  • Preventive maintenance: ongoing technical support.

Useful Tips for Choosing with Confidence

Check the Company’s CNPJ (Brazilian company tax ID)

  • Look up its registration with the Receita Federal (Brazil’s federal tax authority).

  • Check that its status is active, along with its CNAE (business activity code) and how long it has been trading.

  • Search for legal proceedings on sites such as JusBrasil and Serasa (Brazilian legal and credit-check databases).

Assess Their Market Reputation

  • Review their portfolio of completed projects and customer testimonials.

  • Prioritise installers with a well-established online presence.

Demand Technical Qualifications

Check for the mandatory certifications:

  • NR-10 (Brazilian occupational standard for electrical safety)

  • NR-35 (Brazilian occupational standard for working at height)

  • CREA (confirm an active registration with your state’s CREA — the regional engineering council — with a qualified professional able to issue the ART, the Technical Responsibility Note)

Insist on a Bespoke Technical Design

  • Ask that the calculations account for the energy consumed at the same time as it is generated. A tailored simulation maximises your financial return.

  • Sizing, layout and financial calculations adapted to your distribution utility’s tariff.

  • Detailed documentation is your best safeguard.

Insist on Certified Equipment and Favour Recognised Brands

  • The INMETRO seal (Brazil’s national metrology and certification body), inverters with extended warranties and recognised brands.

  • Confirm the specifications of the materials and equipment in the proposal and the contract.

Check the Installer’s Accreditation with Financial Institutions

  • Many banks require the installer to be approved on their lending platforms.

  • An accredited installer speeds up loan approval and disbursement.

Approval with the Distribution Utility

  • An installer’s experience with your distribution utility’s approval process can be a real differentiator.

  • A smooth, surprise-free approval keeps the project on schedule, so you can start enjoying savings on your electricity bill as soon as possible.

Understand the Warranties

  • The installer ensures the equipment warranties are activated and managed.

  • Remember that, whatever the source of the problem, the installer is jointly and severally liable for faults under Brazil’s Consumer Protection Code (Código de Defesa do Consumidor).

Technical Support and Maintenance

  • Check the support channels and the post-installation maintenance plan. A good installer keeps you supported at all times.

The 3D Watt Checklist for Hiring with Confidence

A good technique is to build your client’s perception of value using methods such as FAB (Features, Advantages and Benefits).

CRITERIONCHECKNOTES
Company CNPJ check☐
Installer’s installation track record and market reputation☐
Technical qualifications of the professionals☐
Bespoke technical design including the simultaneity factor☐
INMETRO certification and reputation of the equipment brands☐
Installer’s accreditation with financial institutions☐
Installer’s experience with project approval at your distribution utility☐
Review of the warranty clauses☐
Technical support and after-sales maintenance☐

Next Steps

Ready to hire your solar installer?

Visit the 3D Watt Platform to compare proposals from trusted installers, simulate your system in line with Lei 14.300 (Brazil’s distributed generation regulatory framework) and track the whole journey safely and efficiently.