Sizr Notes

Writing about power, sites andthe software in between.

No thought leadership. Working notes from the sizing problem we spend all day inside, written to be useful on a Monday morning.

Power

Why temporary power gets oversized, and what it costs you

Add up every nameplate rating on a site and you will specify a set roughly twice the size you need. It is a habit, not a calculation, and it has a price.

Latest note

18 August 2026 / 7 min

Sustainability

Quiet hours are the whole hybrid battery argument

A battery does not make a generator smaller by magic. It makes the generator switch off, and the hours it stays off are where the whole business case lives.

11 August 2026 / 6 min

Sustainability

Your carbon report is wrong if it stops at 6pm

Fuel does not clock off. If a report models a ten hour day, it is describing a site that does not exist and a saving that will not appear on the invoice.

29 July 2026 / 5 min

What AI should and should not be doing in power sizing

The interesting use of AI in temporary power is not guessing the answer. It is removing the twenty minutes of questions before the answer and explaining the reasoning afterwards.

15 July 2026 / 6 min