Frequently asked questions

The panels convert sunlight into electricity (direct current), which the inverter turns into alternating current for use at home. Any surplus charges the battery or is exported to the grid.

You can install panels only and save during the day. A battery maximises self-consumption, gives you power at night and protection during grid outages. The calculator compares both options.

With a battery and a hybrid inverter (backup/EPS function), yes — it powers the essential circuits. Without a battery, the system shuts down for safety when the grid fails.

It depends on the area, orientation and pitch. Each LONGi 650W panel takes up about 2.7 m². We carry out a technical analysis with satellite imagery to work out the ideal number.

Yes, although they produce less. Panels generate electricity from diffuse light; annual production is calculated from the average irradiation in your area.

On average between €4,000 and €12,000, depending on the power, equipment and battery. The calculator gives you a personalised estimate based on your consumption.

Typically 4 to 8 years, depending on your consumption and tariff. With rising energy prices, many customers recover it sooner.

Grants (e.g. the Fundo Ambiental) and tax benefits may be available from time to time. Conditions change — we confirm which incentives apply when we prepare your proposal.

Yes. Energy you do not use can be exported to the grid (UPAC), earning you a payment. Income up to a certain annual limit is also exempt from IRS (Portuguese income tax).

We work with payment schedules (typically 30% upfront / 70% on installation) and can point you to credit/financing options.

The physical installation normally takes 1 to 2 days. The whole process — from simulation to grid connection — takes 2 to 4 weeks, depending on technical approval and scheduling.

Yes, it is a turnkey service: design, DGEG registration, installation and after-sales support.

All of mainland Portugal. Head office in Lisbon and warehouse/team in Caldas da Rainha.

No. We use mounting structures suited to each roof type (pitched or flat), keeping the roof watertight and safe.

Tier-1 equipment with product and performance warranties of up to 25–30 years (panels), plus specific inverter and battery warranties from each manufacturer.

Yes. On top of the manufacturer warranties, we provide a warranty on the installation work.

Yes. We provide monitoring and maintenance to keep your system performing over time.

Self-consumption systems must be notified/registered depending on their power. We handle the process for you. Up to 700 W no registration is needed; between 700 W and 30 kW a prior notification (UPAC) is required.

Unidade de Produção para Autoconsumo (self-consumption production unit) — the legal term in Portugal for a photovoltaic system for your own use, with any surplus exported to the grid.