Solar photovoltaic + batteries in coastal villas: production, ROI and roof aesthetics

Solar photovoltaic in Alcudia is profitable investment: 300+ sunny days/year, tax incentives and mature technology. This guide analyzes sizing, batteries, real ROI and aesthetic integration in luxury villas.

Solar production in Alcudia: real data

• Equivalent sun hours: 4.8-5.2 kWh/kWp·day (annual average)
• 400W panel production: 1.9-2.1 kWh/day (700-750 kWh/year)
• 6 kWp installation (15 panels): 10,000-11,500 kWh/year

Sizing by consumption

• 200 m² villa permanent use: 8-10 kWp (€4,500-6,000/year consumption → 20-25 panels)
• Villa seasonal use: 4-6 kWp sufficient (12-15 panels)
• With heated pool: +2-3 kWp additional

Storage batteries

When worth it?

• YES: If year-round living (night self-consumption)
• YES: If frequent power cuts (backup)
• NOT immediate: If seasonal use (grid compensation more profitable)

Options and costs

• 10 kWh lithium battery: €6,000-9,000 (Tesla Powerwall, BYD, Huawei)
• Lifespan: 10-15 years (5,000-8,000 cycles)
• Battery ROI: 12-18 years (less profitable than panels alone)

Total installation costs (2025)

8 kWp system without batteries

• Total: €13,500-18,500

8 kWp system + 10 kWh battery

• Total: €23,500

ROI and real savings

Without batteries (grid compensation)

• Production: 12,000 kWh/year
• Direct self-consumption: 40% = 4,800 kWh (€1,000/year savings)
• Compensated surplus: 60% = 7,200 kWh (€700/year savings at €0.10/kWh)
• Total annual savings: €1,700
• ROI: €16,000 / €1,700 = 9-10 years

Aesthetics: integration in luxury roof

Aesthetic options

• Full-black panels: Black frame and cells (+10% cost, -5% performance but much better aesthetics)
• Solar tiles (Tesla Solar Roof): Total integration but 3-4× conventional panel price
• Coplanar mounting: Panels attached to roof (less visible from street)

Strategic placement

• Rear slope (not visible from main access)
• Optimal south orientation: 180° ±30°
• Ideal Mallorca tilt: 30-35°
• No shadows 9:00-17:00h (trees, chimneys)

Conclusion: profitable investment

Solar photovoltaic in Alcudia has real ROI 9-12 years, durability 25-30 years and increases property value. Batteries improve autonomy but extend ROI. Key: size well, place strategically and integrate with aesthetic criteria.