# Whole-system EROEI: has anyone actually measured it?

**URL:** <https://ukenergyforum.org/t/whole-system-eroei-has-anyone-actually-measured-it/13>\
**Category:** Generation\
**Created:** [September 10, 2026, 10:32am UTC](https://ukenergyforum.org/t/whole-system-eroei-has-anyone-actually-measured-it/13 "2026-09-10T10:32:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![richard](https://ukenergyforum.org/letter_avatar_proxy/v4/letter/r/f0a364/32.png) [@richard](https://ukenergyforum.org/u/richard)\
**Post date:** [September 10, 2026, 10:32am UTC](https://ukenergyforum.org/t/whole-system-eroei-has-anyone-actually-measured-it/13/1 "2026-09-10T10:32:15Z")

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Does a renewables-powered system return more energy than it consumes — measured across the whole system, mining to grid?

The book’s claim is that nobody has measured it, and that the energy cliff leaves little margin for error. If you know of a whole-system EROEI measurement that answers this, post it here with the methodology.