We cut a Mijas business's electricity costs by over €6,000 a year after installing 42 solar panels and a 30.72kWh battery across its tiled commercial roof.
A commercial premises in Mijas came to Marblanc Solar wanting to bring down a heavy electricity bill and take control of rising energy costs. We designed and installed a 25.41kW system of 42 solar panels across the building’s pitched tiled roof, paired with a 30.72kWh battery to carry the business through its evening trade. The result was a projected saving of over €6,000 a year, cutting the annual bill by 79%.
For a business running long hours, electricity is one of the largest fixed overheads – and this Mijas premises was feeling it, with an average monthly bill of €636.64 and an annual spend of €7,639.70. The owners wanted to protect the business against rising tariffs, cut that outgoing significantly, and make use of solar energy well beyond daylight hours, when a hospitality premises is often at its busiest.
They were far from alone in the area. Marblanc Solar has completed a range of installations in Mijas and across the wider province of Málaga, and the process began the same way each time: with a free solar survey. This involved a site visit, a drone inspection of the roof, a shading analysis across each roof face, and detailed energy modelling built around the building’s real consumption, which we used to produce a tailored proposal.
The survey, carried out by our survey engineer Enrique Ferreiro, confirmed both the scale of the opportunity and the challenge the roof presented.
Our energy assessment took into account:
The defining feature of this project was the roof itself: a large, multi-faced tiled structure that called for the array to be split and set out carefully across more than one plane to capture the best of the sun through the day. Battery storage was central to the design from the outset. As with our 10-panel installation in Riviera del Sol, Mijas – where a split east- and west-facing array was paired with a battery for night-time use – this system was built to bank daytime generation rather than lose it to the grid, here on a far larger scale. The 30.72kWh battery lifts self-consumption from 36% on solar alone to 62%, so the premises runs on its own stored energy long after the sun goes down. On these figures the proposal projected a saving of €6,011.02 a year, bringing the average monthly bill down from €636.64 to €135.72.
Our installation team set out the 42 panels across the building’s pitched tiled roof, working with the structure rather than against it. The main block was mounted on the south-east-facing slope to capture strong production through the day, with a further section placed on an adjacent face so the full 25.41kW could be accommodated without crowding a single plane. On a roof broken into several faces and ridges, that careful distribution is what allows a system of this size to perform.
The Sunfer MicroRail system anchored the array securely to the tiled surface, and all cabling was routed cleanly out of sight to preserve the appearance of the building. We took particular care to preserve the integrity of the tiled roof throughout, sealing every fixing point for a weather-resistant, leak-proof finish suited to a commercial premises that cannot afford disruption.
Once the system was commissioned, the support did not stop there. We secured a feed-in tariff with a virtual battery to make the most of any surplus, then monitored the building’s electricity usage daily for two weeks – fine-tuning consumption, setting plug timers, and walking the client through the solar app so they could track generation and storage themselves. The premises was then added to our Monday–Sunday WhatsApp group for ongoing aftersales care, giving the business a direct line to our team every day of the week.
Our Free Solar Survey includes: home visit, drone inspection, 3D performance model, two custom proposals and break-even estimations.
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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