What’s the ROI for Solar Panels?
Six real Marblanc Solar case studies help explain the ROI on solar panels – and what drives the difference between them.
Roman Mitchell is a BEng-qualified civil engineer and Co-Owner of Marblanc Solar, bringing a decade of engineering expertise to one of the fastest-growing solar installers in Spain. Since joining in 2024 he has overseen 500+ installations.
BEng-qualified civil engineer
University of the West of Scotland
10 years' civil engineering experience
500 installations overseen
Get in touch with Roman Mitchell – he will respond within 24 hours (weekdays).
roman@marblancsolar.com +34951823083Roman Mitchell is an accredited civil engineer who comes from a background of starting up and selling his own successful companies. He relocated to Spain in 2024, where he met Adam Millington, the founder of Marblanc Solar. Drawn by the opaportunity he saw in Spain’s solar market and the natural fit with his civil engineering background, Roman became Co-Owner in 2024 with a mandate to transform the client proposal process.
Roman oversees Marblanc Solar’s team of survey engineers, who create detailed solar proposals for prospective clients, and the appointment-setting team responsible for booking survey visits. He works closely with the content team to document installations and produce educational materials about solar energy and how Marblanc Solar operates. Roman is personally present in every client WhatsApp group and takes direct responsibility for the quality of Marblanc Solar’s aftersales care.
Outside of work, Roman enjoys the gym and making the most of life in Marbella.
Roman applies his civil engineering training to a survey process that goes far beyond a standard quote. Each survey includes a drone inspection of the roof to assess quality and solar suitability, a review of the property’s electrical boards and intake capacity, and analysis of the client’s energy bill data. The output is a 15–20 page report covering system design, estimated ROI, payback period, and financial projections – an educational document built to help clients make a fully informed decision.
He uses his skills for the following Marblanc Solar services:
Sur in English
17/05/2026
Featured in SUR in English, Marblanc Solar's 400% growth story – built on in-person surveys and aftercare – while rivals collapsed in Spain's post-boom solar market.
Read More »The Olive Press
17/05/2026
Roman Mitchell quoted in The Olive Press explaining how the Iran war-driven 700% spike in Spanish wholesale energy prices underscores the case for household solar self-generation.
Read More »Bay Radio
25/02/2026
Bay Radio covered Marblanc Solar completing its first Costa Blanca installation, marking the company's official expansion beyond the Costa del Sol.
Read More »NuSun Network
17/05/2026
Roman Mitchell featured on the Nusun Realty podcast covering solar savings, installation process, ROI, and upcoming EU regulations for Costa del Sol property owners.
Read More »The Olive Press
17/05/2026
Olive Press case study showing a Marblanc Solar client on track for 17.7% first-year ROI, with Adam Millington explaining the four key financial metrics used in every proposal.
Read More »Euro Weekly News
Euro Weekly News covered Marblanc Solar donating 180 gift-wrapped toys to the Hadas Caradas Costa Christmas Collection, supporting orphanages and vulnerable families across the Costa del Sol.
Read More »Euro Weekly News
06/11/2025
Euro Weekly News covered the live announcement of Marblanc Solar's €20,000 giveaway winner – ticket 41, a recent customer who received their entire installation cost back.
Read More »Euro Weekly News
17/10/2025
Euro Weekly News cover Marblanc Solar's €20,000 solar system giveaway with details on how to enter.
Read More »Sur in English
26/09/2025
SUR in English covered Marblanc Solar's €20,000 solar system giveaway – described as Spain's biggest – aimed at growing solar adoption across Andalusia.
Read More »The Spanish Eye
17/05/2026
The Spanish Eye covered Marblanc Solar's €20,000 Costa del Sol solar system giveaway, including prize details, entry requirements, and Roman and Adam's quotes on driving solar adoption in Andalusia.
Read More »The Olive Press
01/10/2025
The Olive Press covered Marblanc Solar's €20,000 solar system giveaway with entry details and quotes from Roman Mitchell and Adam Millington.
Read More »Sur in English
14/07/2025
SUR in English reported on a Costa del Sol home nearly destroyed by a cheap, unqualified solar installation, with Adam and Roman warning about the hidden dangers and costs of choosing the cheapest quote.
Read More »Ask the Experts
17/05/2026
In this episode of Ask the Experts, Darren Simons chats with the co-owner of Marblanc Solar Roman Mitchell. Marblanc Solar is a solar installer and solar company based in Marbella, on the Costa del Sol in the province of Málaga.
Read More »Marblanc Solar is the top-rated solar installer focusing on the Costa del Sol and the Costa Blanca in Spain. Hear what our clients say about working with us.
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