The list covers Almassora, Castellón de la Plana, Vila-real and Cabanes, among other towns. Within 20 km of Castellón de la Plana are PSC Placas Solares Castellón, Solaric Solar Renovable and Solarcas. For work that needs return visits, a firm within an hour’s drive is usually worth a slightly higher quote.
direnergy, Instalzeco and Energía Solar La Martina lead on Google among firms with at least 20 reviews. The average rating across the list is 4.8 (firms with at least five reviews). Look at how recent the reviews are; a strong score from years ago says less than a steady run of recent ones.
Off-grid work is different from grid-tied rooftop solar. Ask how many stand-alone systems the firm has fitted, which inverter brands it services itself, and what happens if the battery fails in August.
Questions to ask before you sign
- How many off-grid (stand-alone) systems have you fitted?
- Can you size the system from my appliance list?
- What battery chemistry, usable capacity and warranty are you quoting?
- Which inverter brand, and do you service it yourselves?
- What does the price include: fitting, cabling, certificates?