Radical transparency. Here we document exactly how we calculate savings, production, and ROI for solar installations in Málaga.
Last reviewed:
Our simulations use official APIs and documents to guarantee accuracy:
These are illustrative scenarios, not measured results or an independent audit. Each study should record version, date, location, orientation, shading, hourly consumption and tariff.
| Output and losses | The public example treats output as net annual system energy and uses a 14% system-loss assumption. Losses are not deducted twice. Each project simulation must document its inputs and output. |
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| Direct self-consumption | The example tables assume 60–70% of output. This is not a typical or guaranteed percentage for every home; it must be adjusted to hourly demand and battery use. |
| Savings and payback | Example annual savings = output × direct-use percentage × €0.20/kWh. Simple payback = investment excluding VAT / annual savings. Exports and incentives are not included. |
| Complete scenario | The individual study should separate VAT, total investment, exports, financing, maintenance, replacements, degradation and tariff scenarios. Neither a 3% annual price rise nor 0.5% degradation is a universal guarantee. |
Example: 5,940 kWh × 60–70% × €0.20/kWh = €712.80–831.60/year. At €4,500 excluding VAT, simple payback is 5.4–6.3 years before tax and costs. This does not replace a final VAT-inclusive quotation.
Links to key regulations for self-consumption in Andalusia: