How we decide where a battery goes.
Every score Gridspace produces comes from an ontology — a structured theory of what makes a place work for storage. It is versioned, auditable, and open to argument. This is where we show it.
Ontology Explorer
Browse the site types we screen for — what defines each one, why it works, what kills it, and how confident we are.
Explore the ontology →Decision Log
Every change to the scoring model, dated, explained, and attributed. What we changed, what evidence moved us, who validated it.
Read the log →Discovery Feed
The AI proposes site types and candidates. Humans confirm or reject. Both outcomes are published — including the misses.
See what we're testing →Ontology Lab
Disagree with our weights? Fork the ontology, change them, and run it against the real map. Publish your version.
Open the Lab →The current model
Why these weights? → The decision record that set them, including the recorded dissent.
Latest findings
Things we learned from running the ontology. Every finding has a number in it.
What actually kills a battery site — nine post-mortems
Six of nine failed on ownership fragmentation, not on grid or permitting.
Inside the feasibility score, 0 to 100
Five categories, 23 weights, and the confidence rating that changes what a number means.
Why we retired cemetery maintenance yards
Adequate on geometry and access; fails on social license in every district tested.