Technology that follows the sun. Energy that fits into your home, your business and your project.
Sun. Architecture. Innovation. Technology.
Our technologyHot water and pools with the collector that follows the sun.
Got old solar collectors?See how to replace them with RTS PLUS.↗
A vote of confidence
Trust in Sunaitec equipment starts in our partners' projects.
Energy solutionsPanels, batteries and heating & cooling for homes and businesses.
Still heating your home with oil?Swap the boiler for a heat pump.↗
Technology partners
We install and stand behind the leading brands in solar energy.
01 — Who we are
We believe energy should be a natural part of the space. That is why we design and manufacture solar technology that brings together engineering, efficiency and architectural freedom.
From heat to electricity, we think of every project as a whole. For your home, for your business, for a future with more possibilities.
02 — Projects
Homes, hotels, industry and agribusiness.
From design to installation
Answer four questions and get a first estimate. Every request is reviewed by an engineer.
Request a quote ↗Designed and made in Portugal.Our own technology · solar thermal
RTS PLUS builds hot water production into the architecture of the building. The receivers work horizontally and become pergolas, shading canopies or roofs, with no tilted panels on the roof.
At sunrise, each receiver turns its mirror towards the sun.
Sunlight is concentrated nineteen times onto the absorber tube and heats the water.
Tracking continues all afternoon: more hours of output than a fixed collector.
Above, an architectural element. Below, shade and hot water.
One system, two perspectives
For the architect
For the engineer
01 — Architecture
The solar system is no longer equipment to hide on the roof. Designed by the architect, one element shades, shelters and produces energy: a pergola, a canopy over the façade, the roof of a pool or a car park.
The façade shades, filters the light and heats the pool.
Integration types
02 — Developers and investors
RTS PLUS meets the renewable energy share required for domestic hot water and contributes to the building's energy rating, without compromising the image of the development.
A renewable contribution to the building's energy performance, with the energy simulation carried out by Sunaitec.
Hot water from the sun, tracked throughout the day, with useful output on sunny winter days too.
Solar Keymark certification, national and international patents and more than 3,000 units installed, mainly in hotels and residential buildings.
03 — How it works
Technical columns support adjustable solar thermal receivers. Active sensors keep each receiver aligned with the sun, so it produces more than a fixed collector. It is the result of research in materials engineering, optics, thermodynamics, robotics and digital electronics.
Output per receiver, aperture area, dimensions, operating pressure, heat losses and mounting conditions: all in the datasheet, sent straight to your email.
The design manual and installation instructions are provided to installers and designers in the client area.
For your home
Pumped flat-plate collectors lose efficiency over the years. We replace them with RTS PLUS and reuse whatever is still in good condition.
We work with architects and engineers on the design of the solution, send the technical dossier and carry out the energy simulation for regulatory compliance.
Solar PV and batteries
Every system is sized from your consumption profile, location and available area before any quote is made.
Calculator
Enter your average monthly electricity bill. The calculation uses solar output for central Portugal.
Assumptions: electricity at €0.21/kWh incl. VAT, 1,520 kWh/kWp per year in central Portugal, 590 Wp modules, surplus sold at €0.03/kWh. Indicative values: the site survey fine-tunes the system.
—
Bill above €1,000? We'll prepare a tailored study. Request a study
Equipment
Self-consumption systems on pitched roofs, flat roofs, ground mounts or pergolas.
12-year product and 25-year output warranties
They store the energy produced during the day for use at night. Lithium-ion technology.
Around 20 years of service life · minimum 10-year warranty
Charge your electric vehicle with the energy your panels produce, with smart power management.
WallboxIncluded in every quote
Send us your electricity bill and a photo of the roof. Every request is reviewed by an engineer.
Heat pumps and hot water
Monobloc heat pumps with natural refrigerant R290. They heat the home, cool it in summer and make hot water, with water up to 75 °C for the radiators you already have.
Boiler replacement
It is one of the jobs we do most. The heat pump connects to your existing radiators and you stop depending on heating oil.
SNT-BCM range · rated values
| Model | SNT-BCM-08 | SNT-BCM-12 | SNT-BCM-15 | SNT-BCM-18 |
|---|---|---|---|---|
| Heating output | 8 kW | 12 kW | 15 kW | 18 kW |
| Power supply | 1-phase / 3-phase | 1-phase / 3-phase | 1-phase / 3-phase | 1-phase / 3-phase |
| COP A7/W35 (underfloor) | 5,33 | 4,76 | 5,02 | 4,75 |
| SCOP W55 (radiators) | 3,97 | 3,99 | 4,03 | 3,99 |
| Energy class W35 / W55 | A+++ / A+++ | A+++ / A+++ | A+++ / A+++ | A+++ / A+++ |
| Cooling A35/W7 | 8.0 kW | 11.8 kW | 14.5 kW | 16.0 kW |
| Sound pressure at 1 m (W35) | 41 dB(A) | 44 dB(A) | 47 dB(A) | 49 dB(A) |
| Typical area (radiators, average insulation) | up to 110 m² | 110 a 170 m² | 170 a 215 m² | 215 a 260 m² |
Domestic hot water
Tank and heat pump in a single unit. It replaces the gas water heater, the electric boiler or the oil boiler for hot water, using a fraction of the energy.
We remove the oil or gas boiler and connect the heat pump to the existing system. With radiators there is usually no building work.
A tank with a built-in heat pump replaces the gas or electric water heater and uses a fraction of the energy.
We size the output from the home's area, insulation and emitters, not just from a catalogue.
Tell us the floor area and your current heating system. You get a first recommendation straight away.
Solar collector replacement
We replace old flat-plate collectors with RTS PLUS, the solar thermal technology we develop and manufacture in Portugal.
How we do it
The receivers work horizontally: they can sit on the roof, on a terrace or on a pergola that gives shade.
Monitoring
RTS PLUS comes with remote monitoring. You can follow solar production and water temperature from your phone.
Tell us how many collectors you have and what is failing. A photo helps us prepare the visit.
Oil boiler replacement
We replace the boiler with an R290 heat pump connected to your existing radiators. It heats, cools in summer and can make your hot water.
How we do it
With radiators, building work is usually not needed. The output is sized for your home, not taken from a catalogue.
Calculator
Enter how many litres you buy per year and the price you pay. We compare it with the cost of a heat pump heating the same home.
Assumptions: agricultural/heating oil (dyed), 10 kWh per litre, boiler efficiency 85%, heat pump SCOP 3.9 (radiators at 55 °C), electricity at €0.21/kWh incl. VAT. Indicative values. The site survey confirms output and consumption.
—
Sunaitec range
Monobloc units with natural R290 refrigerant and water up to 75 °C for your existing radiators. The output is sized on site, from the floor area and insulation.
| Model | SNT-BCM-08 | SNT-BCM-12 | SNT-BCM-15 | SNT-BCM-18 |
|---|---|---|---|---|
| Heating output | 8 kW | 12 kW | 15 kW | 18 kW |
| Power supply | 1-phase / 3-phase | 1-phase / 3-phase | 1-phase / 3-phase | 1-phase / 3-phase |
| COP A7/W35 (underfloor) | 5,33 | 4,76 | 5,02 | 4,75 |
| SCOP W55 (radiators) | 3,97 | 3,99 | 4,03 | 3,99 |
| Energy class W35 / W55 | A+++ / A+++ | A+++ / A+++ | A+++ / A+++ | A+++ / A+++ |
| Cooling A35/W7 | 8.0 kW | 11.8 kW | 14.5 kW | 16.0 kW |
| Sound pressure at 1 m (W35) | 41 dB(A) | 44 dB(A) | 47 dB(A) | 49 dB(A) |
| Typical area (radiators, average insulation) | up to 110 m² | 110 a 170 m² | 170 a 215 m² | 215 a 260 m² |
Domestic hot water
Tank and heat pump in a single unit. It replaces the gas water heater, the electric boiler or the oil boiler for hot water, using a fraction of the energy.
Monitoring
The Sunaitec heat pump comes with Wi-Fi and remote monitoring. You can follow its operation and adjust comfort from your phone.
Tell us the floor area, how much you spend on oil and what radiators you have. A photo of the boiler helps us prepare the visit.
Partners
For distributors, installers, architects, engineers and designers. Prices, documentation and orders all in one portal.
Sell heat pumps and solar systems under the Sunaitec brand, backed by the technical support of a team that installs them every day.
Include RTS PLUS in your project and meet renewable energy requirements without compromising the building's design.
Sign in to the client area to see quotes, orders and invoices.
Sign in to the client areaPortfolio
Hotels, apartment buildings, industry and homes — photographed on site by our team.
Tell us what you want to heat, generate or charge. We will send you a quote within a few days.
Company
Sunaitec is a 100% Portuguese-owned company that develops, manufactures and sells advanced solar energy solutions. 18 years of experience, from the lab to the building site.
Quality policy
Management is committed to providing the resources needed to continually improve the Quality Management System and risk-based thinking.
ISO 9001 certified system · SGQ 134/2018
Certificates and licences
Portfolio
Residential, industry and hospitality.
Terms and privacy
How this website works, what data we collect when you contact us, why, and for how long. Last updated: October 2026.
This English version is provided for convenience. In case of any discrepancy, the Portuguese version prevails.
Sunaitec, Lda · VAT PT508089140 · Estrada das Moitas Altas, 300, Fração D, Pinheiros, 2415-746 Leiria, Portugal · +351 244 818 470.
For any question about your personal data, email [email protected] with "Data protection" in the subject line.
We only collect the data you give us in the website forms:
The website uses no advertising cookies and no third-party analytics tools. We do not ask for sensitive data; please do not include it in messages or attachments.
We do not sell or share your data with third parties for marketing and we make no automated decisions that affect you. Estimates from the calculator and the request form are indicative only.
After these periods the data is deleted or anonymised.
Website requests go straight into our management system (Odoo), hosted on servers in the European Union. We use service providers that process data on our behalf under contract and with appropriate safeguards: hosting and infrastructure in the EU, email and, if you choose that channel, WhatsApp for contact. The website loads no third-party resources: fonts, images and videos are served from our own server.
If any provider processes data outside the European Economic Area, the transfer only takes place with the safeguards set out in the GDPR, such as adequacy decisions or the European Commission's standard contractual clauses.
The website uses no cookies. We only store two items on your device (browser local storage), both needed for features you use: the draft of an unfinished quote request, so you do not lose what you typed, and whether you closed the contact suggestion, so it does not show again. This data is never sent to us and you can clear it at any time in your browser settings. The pages you visit are only used during your visit, to preselect the solution in the request, and are not stored.
You can request access to, rectification, erasure, restriction and portability of your data, object to processing and withdraw consent at any time, without affecting processing carried out before. Just write to [email protected]; we reply within one month.
You also have the right to lodge a complaint with the Portuguese data protection authority, CNPD (www.cnpd.pt).
The website only runs over an encrypted connection (HTTPS), access to the management system is restricted to the people who need the data for their work, and we keep backups. No system is infallible; if we detect a personal data breach that poses a risk, we will notify the CNPD and, where required, the people affected, as the law requires.
You can file a complaint in the Electronic Complaints Book (Livro de Reclamações). For consumer disputes you may turn to an alternative dispute resolution body such as CNIACC – National Centre for Consumer Dispute Information and Arbitration (www.cniacc.pt). The full list is available on the Portuguese Consumer Portal.
These terms are governed by Portuguese law. Without prejudice to mandatory consumer protection rules, the courts of Leiria have jurisdiction.
Quote request
Four steps. At the end you get a reference number and your request goes to an engineer.
Prefer to answer on WhatsApp? Continue on WhatsApp ↗
5.0on GoogleProject
Got a project?Request a quote in 2 minutes.
Request a quote
