Estimate how much solar adds to your property value
Enter your home details. The calculator gives a range, not a single number, based on Spanish market studies of energy-rating premiums. It is an indicative estimate, not a valuation.
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Leave your details and a KiDi Solar engineer will prepare a free system proposal and tell you how it affects your energy certificate.
How the estimate works
Spanish research links a better energy rating to a higher sale price. The calculator applies these findings to your inputs:
- Per-step premium. A joint IESE, Tinsa and Accumin study of about 243,000 homes (2012-2024) found that each one-letter improvement raises value by 1.3% on average; for Andalucia the effect is closer to 1.0-1.1%, and for detached houses about 1.5%.
- How many letters solar adds. Panels cut non-renewable primary energy use and CO2 emissions. Depending on system size, self-consumption and prior consumption, a certificate typically improves by one letter and sometimes two (Tinsa).
- Bigger gap for poorly rated homes. Older Spanish studies (BC3, 2015; Alicante, 2020) found homes rated E-G priced noticeably lower than D or better (roughly 5-10% in small samples). If your home moves out of E-G, the high case reflects this.
- Cost. Indicative price of 950 EUR per kWp including IVA; a hybrid inverter (+1,000 EUR, under 7 kWp) or a 16 kWh battery (+2,000 EUR, from 7 kWp) if selected. We do not count a battery as a certificate improvement.
Scenarios: low = conservative per-step premium (1.0%) with one letter, or no change if the system covers only part of your use; most likely = one letter at the premium for your property type; high = two letters, or the larger E-G threshold effect.
Limits. Studies measure average listing and sale prices, not your individual home. Asking prices are not final prices, some samples are small, and the certificate must actually be updated by a qualified technician after installation. Savings on electricity bills are separate from, and additional to, any value effect.
Frequently asked questions
Do solar panels increase property value in Spain?
Evidence suggests yes, mainly through the energy certificate. Spanish data show about 1.3% higher value per energy-rating letter on average, and solar can raise the rating by one letter or sometimes two. The effect is an average, not a guarantee.
Do solar panels change my energy certificate?
They can. The certificate does not update automatically; a certified technician must issue a new one after installation. KiDi Solar can coordinate this.
Is the result a valuation?
No. It is an indicative range from published studies. For a bank or legal valuation use a registered appraiser.
Does a battery add value?
A battery improves self-consumption and independence, but we do not count it as a separate value uplift because there is no reliable data for Spain.
What does a solar system cost on the Costa del Sol?
Typical turnkey price at KiDi Solar is around 950 EUR per kWp including IVA, so a 5 kWp system is about 4,750 EUR. The final price depends on the roof and equipment.
Sources
- Tinsa: energy certificate and solar panels (citing the IESE / Tinsa by Accumin report)
- BC3 Basque Centre for Climate Change (2015): energy label and housing price in Spain
- MDPI (2020): energy efficiency and asking prices, Alicante
Figures are published averages. KiDi Solar does not guarantee a specific increase in value.