Photovoltaic self-consumption in schools and educational centers
Table of Contents
Why self-consumption works in an educational institution
- Daytime consumption = sun: school hours coincide with the highest photovoltaic production.
- Stable savings: you reduce the energy term from the first month.
- Work without interruptions: we plan work during vacations or weekends.
- School security: controlled access, lifelines and protected pipelines.
- Educational value: monitoring screen to work on sustainability and stem.
Self-consumption modalities recommended for schools
| Modality | When it fits | Practical note |
|---|---|---|
| With surplus (compensation) | Schools ≤ 100 kW in bt | Monetize midday; do not size “to pour”. |
| No surplus (anti-spill) | Contracts or environments with injection restrictions | Fast turnaround; take care of size to avoid cutting back |
| With batteries | Winter evenings, events, weather/tic peaks | Increases useful % and can lower power |
| Collective (shared) | Nearby campuses and municipal buildings |
Allocation by coefficients; allocation monitoring |
How much a school saves (indicative)
| Center size | Typical power | % self-consumption without / with battery |
|---|---|---|
| Small school (300-500 students) | 25-40 kWp | 60-75% / 70-85% |
| Medium school (500-1,000) | 40-80 kWp | 60-80% / 75-90% |
| Large campus | 80-150 kWp | 55-75% / 70-90% |
Quick example
Annual consumption: 180,000 kWh – system 80 kWp → production ~128,000 kWh/year
- Without battery (self-consumption 70% / compensation 10% at 0.08 €): savings ≈ 89,600×0.16 + 12,800×0.08 = ~16,128 €/yr.
- With battery (self-consumption 85% / compensation 5%): savings ≈ 108,800×0.16 + 6,400×0.08 = ~18,304 €/year → difference ~2,176 €/year (value battery capex).
What we always include
How we size (designed for school calendar)
- Audit by load curve (12 months): school vs. vacations, working days vs. vacations.
- Hourly simulationby orientation/tilt and shadows (patios, huts, trees).
- Size sweep: we choose the point with the most useful self-consumption (we do not oversize per summer).
- Battery operated stage(optional): winter evenings, events and peak weather/tic.
- Modality: with surplus (compensation), without surplus (anti-dumping) or collective (nearby campus/buildings).
- Site plan: no classrooms in use, safe routes, signage and janitorial training.
Safe construction without interrupting classes
- Assembly during vacations or weekends so as not to disrupt the classroom. Bounded areas, signage, epis and lifelines.
- Noisy work outside school hours.
- Final review with janitorial/maintenance and delivery of manuals.
Grants and financing
Municipal subsidies (ibi/icio) and regional programs.
On-site PPA: no initial investment; you pay per kWh cheaper than the grid.
Turnkey EPC if you prefer to be owners from day 1.
- We combine subsidies and deductions to maximize ROI.
Our projects
- Equivalent to plant 1.000 mature trees
- Equivalent to plant 260 mature trees
Frequently Asked Questions
What happens to summer if the center is empty?
We dimension to maximize self-consumption during the school year, without over-dimensioning for summer. The base consumption (tic, cameras) supports part of the production; the rest is compensated in the invoice or the battery is valued.
Do we need batteries to make it profitable?
No, with daytime you already achieve a high % without battery. The battery compensates if you want to cover winter evenings, events or cut power peaks.
Can the work be done without affecting classes?
Yes, we schedule on vacations or weekends, we narrow down areas and move noisy work out of school hours.
With or without surplus?
If you can compensate surpluses, you monetize midday. If not, we install anti-spill and adjust size to avoid cuts.