7 solar panel myths in Spain that aren't true
Myth 1: "Solar panels don't work with clouds." False. Modern panels generate up to 25% capacity on cloudy days.
Myth 2: "Only worth it with a big roof." Not necessarily. 4-6 panels can cover a significant portion of your consumption.
Myth 3: "It takes 20 years to pay off." With current rates and subsidies, typical payback in Spain is 4-7 years.
Myth 4: "Panels degrade quickly." Modern panels have 25-30 year warranties and lose only 0.5% efficiency per year.
Myth 5: "Can't do solar on a flat." You can, via shared self-consumption in HOAs.
Myth 6: "You need batteries." Not always. Net metering can suffice if you consume during the day.
Myth 7: "Subsidies are gone." Still active in 2026: MOVES III, IRPF and regional grants.
This article was written by the DoctorSun team. We sell no panels — just honest advice.