Insights

Plain-language guides for people who buy and manage energy.

Tariffs, proposals and performance, explained without the jargon. Practical guides to help you ask better questions of your bills, your suppliers and your own systems.

Guides

Start here · Bills and tariffs

How to read a commercial electricity bill

The charges on a commercial bill respond to different fixes. Learn which is which, and five checks to run on your last 12 months before you spend anything.

3 min readRead the guide

In this guide

The charges you will usually find
Five checks on your last 12 months
What to do with what you find

Solar and procurement

Ten questions to ask before you accept a solar proposal

A good proposal answers most of these before you ask. If yours does not, ask them. The answers show whether the saving on the front page will survive your site.

3 min readRead the guide

Performance

Why solar systems miss their business case after commissioning

A system that works on commissioning day can still miss its forecast. The usual causes are ordinary, and so are the ways to catch them.

3 min readRead the guide

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Practical energy notes

Tariffs, project lessons and performance findings for businesses that buy and manage energy.