Blog

What I think, out loud.

Reflections from the front line of community energy transition. Real stories from assemblies, town halls and rooftops.

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FeaturedJuan's diary
25 Apr 2026 · 4 min read

Why I built this site

And why you're late if you want your own energy community.

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Energy communities
18 Oct 2026 · 10 min read

The Dutch miracle of renewable acceptance

The Netherlands put 50% local ownership in writing. Seven years on: 44% in wind, 21% in solar and an awkward lesson for Spain.

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Energy policy
16 Jul 2026 · 7 min read

The bottleneck of Spain's energy transition

Iberdrola and an independent analyst agree the grid model isn't working. What alternative models exist —Germany, Catalonia— and what Spain should learn.

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Coming soon

Energy communities

What "energy community" really means

Three myths and one inconvenient truth.

Cooperativism & CGE

Why Sapiens is a non-profit cooperative

And why that changes everything.

Energy policy

The auditor who didn't believe the model

A real story from a Valencian town hall.

Energy communities

How to set up an energy community

Seven steps any neighbourhood can take.

Juan's diary

What I learned at Acumen

The difference between fixing a problem and breaking a cycle.

Energy poverty

72 families, 80% savings

The arithmetic of solidarity energy.

Energy letters

Once a month I write to you. No noise. Lessons from the front line of community energy transition — what I see in town halls, assemblies and rooftops.