Self-consumption in Spain falls in H1 2025 (–14.6%), but residential and batteries take off
Quick summary: Spain added 611 MW of self-consumption in the first half of 2025, a –14.6% year-on-year change. The decline is concentrated in the industrial segment (–22.9%) due to curtailment and grid saturation, while the residential and storage segments grew strongly after the Iberian blackout in April.
What happened and why it matters
According to APPA Renovables, price differentials in the day-ahead market and grid congestion have pressured the profitability of industrial self-consumption, with 19% curtailment in 2024 and over 83% of nodes saturated for new demand. At the same time, the April blackout prompted households to add or prepare batteries and backup.
Key data
- 611 MW installed in H1 2025 (self-consumption).
- –14,6% vs H1 2024.
- –22,9% in industrial (≈70% of total power).
- +11.6% in residential; 146 MWh of batteries in H1 2025, almost all of 2024.
- 19% of self-consumed energy was cut in 2024; >83% of saturated nodes.
What it means for SMEs and homes (ES/PT)
The value of self-consumption shifts from surplus to autonomy and flexibility. For companies: battery + back-up reduces exports and peaks, and enables demand response. For homes: hybrid systems with battery improve supply security in the event of grid incidents.
Aurensol recommendations
- Single-phase hybrid inverters with back-up and wide MPPT window.
- Three-phase hybrid inverters for C&I with export control.
- 48 V lithium batteries (LV) for residential and retrofit.
- Modular HV batteries for medium-high power.
- “All-in-one” systems with integrated BMS and monitoring.
Regulation and upcoming measures
The sector is calling for tax incentives, a 10% reservation of grid capacity for self-consumption, and specific storage regulation to accelerate investment and compliance with the PNIEC 2030.
Source
PV Tech (17/09/2025): “Self-consumption keeps falling in Spain, sector adds 611 MW in H1 2025”, by Jonathan Touriño Jacobo. Read original.
Note: This article summarizes public information and adds Aurensol's own analysis for clients in Spain and Portugal.
