A photovoltaic system is an investment that spans decades, and the difference between a good system and a poor one lies in the choice of equipment and the quality of the installation. We use exclusively components from authorised distributors, with recognised bankability and real warranties. Below we explain, in plain terms, what matters for each component.
Four main components work together: the panels produce, the inverter converts, the battery (optional) stores, and the app shows you everything in real time.
Modules from manufacturers classified as tier-1 in the Bloomberg NEF reports — an indicator of bankability, that is, of the manufacturer’s long-term financial soundness. We use bifacial modules where the installation allows it (they also capture reflected light), with low annual degradation, typically 0.35–0.55% per year. Extended product and performance warranty, around 25 years.
The inverter is the “brain” of the system: it transforms the direct current produced by the panels into alternating current usable in the home. We choose between string inverters (efficient and economical, for roofs without shading) and microinverters or optimisers (for complex roofs or those with partial shading), with a conversion efficiency above 98%. Typical warranty of 10 years.
For independence and backup during power outages we recommend batteries with LFP (lithium iron phosphate) chemistry, thermally safer and more durable than the NMC variants. Usable depth of discharge (DOD) typically 80–95% and over 4,000 charge cycles, with a warranty of around 10 years. You store the daytime surplus for evening consumption.
See production, consumption and system status in real time from the dedicated app, on iOS and Android. You receive alerts on abnormal operation and a monthly report with the production achieved — the basis for our performance guarantee, which compares the real production with the estimated one.
Not every lithium battery is the same. The NMC (nickel-manganese-cobalt) variants have high energy density but are more thermally sensitive. For residential applications, where the battery stays mounted next to the house for years, the priority is safety and lifespan, not maximum compactness.
That is why we recommend LFP chemistry: superior thermal stability, a reduced risk of thermal runaway and a significantly higher number of cycles, which means more years of operation at the same usable capacity. We size the capacity according to your evening and night consumption, so you don’t pay for storage you don’t use.
Quality equipment only matters if it is installed and authorised correctly. We work exclusively with qualified and insured personnel.
ELECRO is ANRE-authorised, and the installation is carried out by electricians with an authorisation grade appropriate to electrical works. This is the condition for your installation to be legally connected to the grid and registered as a prosumer.
The works are covered by professional liability insurance, and the installation benefits from a 2-year warranty from us, on top of the equipment manufacturers’ product warranties.
If the system produces more than 10% below the estimate in the offer during the first year of operation, we step in and correct it at our own expense. The estimate is based on the real solar resource of the area, not on optimistic figures.
The final configuration is set after a technical visit, depending on the roof, consumption and budget. Let’s talk about your home.