Self-consumption vs grid feed: which is better?

Indicative comparison as of April 2026. Tariff offers verified at retailer level — confirm current conditions before contracting. Translation may need a fact-check pass.

For most homes in Málaga, simplified compensation with fixed tariff is the best self-consumption option. It’s simpler, doesn’t require producer registration, and combined with a retailer offering fixed compensation (~0.07 €/kWh) offers the best balance of savings and simplicity. But there are nuances worth knowing before choosing.

The 3 self-consumption options in Spain

The Royal Decree 244/2019 RD 244/2019 · BOE 06/04/2019 defines three legal modalities for residential photovoltaic installations. Each has different administrative, fiscal and economic implications.

Simplified compensation: how it really works

When your panels produce more than you consume (typically 10:00 to 16:00 in Málaga), the surplus is automatically exported to grid. Your retailer compensates by discounting it from the cost of energy you consumed from grid in non-solar hours.

The PVPC problem in solar hours

Here’s the data many websites omit: PVPC price during peak solar production hours is almost zero. This means if your retailer pays surplus at hourly PVPC price, you’ll receive a derisory amount per kWh exported at noon.

These are the real PVPC prices on a typical April 2026 day:

The solution: fixed compensation tariff

Some retailers offer a fixed price for your surplus, regardless of hour. This radically changes the economy of your installation. In April 2026, the best offers are around 0.07 €/kWh.

Real comparison: Málaga, 5 kWp, average family

To see real economic impact, we calculate a concrete scenario: 5 kWp installation in Málaga (verified production of 1,656 kWh/kWp/year via PVGIS PVGIS 5.2 · 2026-04-08 ), family with average consumption, instantaneous self-consumption of 40%.

Clear winner: compensation with fixed tariff (€779/year) over PVPC (€531) and market sale (€681). The difference between fixed tariff and PVPC is €248 annually — just by changing retailer.

The virtual battery: third option

Some retailers offer a “virtual battery” for €2.90-3.90/month extra. It works like this: your surplus is “stored” virtually and you recover it at another time of year (even another month). It’s like having a physical battery, but without hardware.

When does a physical battery make sense?

Physical battery is a much larger investment (€4,000-8,000 for 5-10 kWh) but has advantages no virtual solution can offer:

• Your electricity tariff has large peak/valley spread (more than 0.15 €/kWh difference between valley and peak hours).
• You need backup against power outages (critical appliances, remote work, isolated installations).
• Your self-consumption without battery is less than 30% (empty home during the day, consumption concentrated at night).
• You want maximum independence from the grid and don’t mind paying a premium for it.

For a detailed analysis of battery types, current prices and when it really compensates, check our battery price guide, use our calculator, or review the April 2025 blackout analysis.