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.

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.

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.