We cut a client's electricity bills by €4,846 a year – a 97% reduction – after installing 31 solar panels and battery storage at a villa in Estepona, Málaga.
Marblanc Solar installed an 18.755 kWp ground-mounted solar system with 26.28 kWh of usable battery storage and an EV charger at a villa in Estepona, Málaga. The client wanted near-total energy independence and relief from a rising electricity bill, so the system was sized to carry the property day and night. It is projected to cut their annual electricity costs by €4,846.96 – a 97% reduction.
With an average electricity bill of €417.64 a month – over €5,000 a year – the client had reached the point where the running costs of a large villa made a serious solar investment an easy decision. The goal was energy independence: not simply trimming the bill, but covering as much of the property’s demand as possible from its own generation and storage, around the clock.
After looking through our installations in Estepona and across the wider province of Málaga, the client arranged a free solar survey. Our assessment combined an on-site visit, a drone survey of the grounds, a shading scan of the surrounding treeline, and detailed energy modelling to size the system against the villa’s real consumption.
The survey confirmed the high annual usage typical of a large villa with a pool, and identified one defining site characteristic: the best home for the array was not the roof but an open, flat section of land below the garden, bordered along its eastern side by dense mature woodland. Our survey engineer Alan Manning modelled the site to make the most of that open aspect while designing around the shade.
Our energy assessment took into account:
Ground-mounting the array became the defining feature of the design. Freed from the constraints of the villa’s roof, we could orient and tilt every panel for maximum year-round yield, while panel-level optimisers were specified to protect output from the neighbouring trees. Battery storage was central to the system from the outset. As with our 13-panel installation in Estepona, the client wanted to draw on stored solar power through the evening rather than falling back on the grid after sunset – though here, a far larger 26.28 kWh usable bank takes that principle much further, carrying the bulk of the property’s night-time demand. The modelling projected an annual saving of €4,846.96, cutting the average monthly bill from €417.64 to just €13.73.
Our installation team built the array on an open, flat section of land below the garden, mounting the 31 panels on a heavy-duty galvanised ground structure set on concrete foundations for long-term stability. Because the frame set the geometry rather than an existing roof, every row could be pitched and oriented for optimal year-round production, arranged in staggered rows across the site. Each panel was fitted with its own TIGO optimiser, so shade tracking across the array from the eastern treeline affects only the panel it touches rather than dragging down a whole string.
All DC and AC cabling was routed cleanly out of sight between the array, the Sigenergy inverter and the battery bank, run in UV- and fire-rated conduit to current REBT standards. The galvanised structure itself was engineered for corrosion resistance and secure anchoring, giving the ground-mounted system a stable, weather-resistant footing built to last the life of the panels.
Once the system was commissioned, our aftersales care began straight away. We registered the client on a feed-in tariff with a virtual battery to bank any surplus exported to the grid, then spent the first two weeks monitoring daily consumption, fine-tuning plug timers to line up with peak solar hours, and setting up the monitoring app so the client could follow live generation, battery charge and EV charging from their phone. They were also added to our Monday–Sunday WhatsApp aftercare group for ongoing support.
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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