Frequently asked questions

A typical 4.5 kWp system (10 modules) costs around €6,950 including VAT, installed and registered. With a Reserva 10 battery, around €11,900. You get a fixed price after the site visit.

It depends on how much you use and when. A family using 4,900 kWh a year usually saves €600–750 a year without a battery and €950–1,100 with one. Your proposal gives your figure, not an average.

For homes, 7 to 10 years. For businesses, 4 to 6. Panels produce for more than 25 years.

Many Spanish municipalities offer property-tax and building-tax rebates for several years. We tell you what's available where you live and help you apply. We never include uncertain subsidies in the payback calculation.

Almost always. An east-west roof produces 12–18% less than a south-facing one, but spreads production better across the day.

We don't install on fibre cement: it may contain asbestos. We'll put you in touch with an authorised removal company and install afterwards.

You can join a collective self-consumption scheme with your neighbours. We'll explain it at your residents' meeting.

About 3 weeks from accepting the proposal to installation day. Installation takes one day. Full grid registration takes 1 to 3 months; you self-consume in the meantime.

A Luxsolaris crew of 2 or 3 people with a crew leader. They'll call the day before to confirm the time.

At the start and at the end. When they finish, the crew leader shows you the system, the switchboard and the app. It takes about 20 minutes and is worth it.

On tiles, we lift them, fix the bracket to the roof structure and replace them with a sealing piece. On metal sheet we use fixings with watertight seals. On flat roofs, ballast, no drilling.

Without a battery, the system disconnects for safety, as regulations require. With a Reserva battery and backup kit, the circuits you choose keep working.

It goes to the grid and your supplier deducts it from your bill (simplified surplus compensation). If you have a battery, it charges first.

Aster modules have a 30-year performance warranty: at least 87.4% of initial output in year 30. The inverter is usually replaced once in the system's life; it has a 10-year warranty.

Rain does most of the work. In dusty areas or near farmland we recommend one clean a year, included in the Home Care plan.

Check that the Lux Gateway light is solid green. If it flashes orange, it has lost Wi-Fi. If that doesn't fix it, call +34 000 000 003.

With your email or phone number and a 6-digit PIN, or with your Google, Facebook or Apple account.

In the app, under Invite your friends, share your link. When someone installs with us, you each get €50 off your next maintenance bill or an accessory.