Home Energy Guides
Plain-English explanations of how home energy works — electricity bills, solar, EVs, heat pumps, and more. Every guide links to a free calculator so you can run the numbers for your home.
What Is a Kilowatt Hour (kWh)?
The one unit that appears on every electricity bill, explained with everyday examples — fridges, TVs, EV chargers.
Understanding Your Electricity Bill
Every line on your electricity bill decoded — kWh charges, fixed fees, demand charges, taxes, and how to spot errors.
EV Home Charging 101
Level 1 vs Level 2 charging, installation costs, overnight charging strategy, and how much it actually adds to your bill.
How Home Solar Panels Work
From photons to kilowatt hours — how solar panels, inverters, and net metering work together to power your home.
Heat Pump Guide: How They Work & When They're Worth It
What heat pumps are, how they deliver 2–4× more heat than they use, and whether one makes financial sense for your home.
15 Ways to Reduce Your Energy Bill
The highest-impact changes — ranked by typical annual savings — from switching bulbs to replacing appliances to solar.
Where should you start?
Our home energy guides are written for homeowners, not engineers — no jargon, no sales pitch, and every figure traced to an official source. Where you begin depends on what you're trying to work out:
- • New to how energy is measured? Start with What Is a Kilowatt Hour (kWh)? — the one unit behind every bill and calculator.
- • Bill higher than expected? Read Understanding Your Electricity Bill, then 15 Ways to Reduce Your Energy Bill, ranked by typical annual savings.
- • Weighing up solar, a heat pump, or an EV? The solar, heat pump, and EV charging guides explain how each works and when it actually pays off.
Guides, calculators, and the blog — what's the difference?
Guides explain how something works in plain English. Calculators put exact numbers on your own home — every guide links to the relevant one, so you go from "how it works" to "what it costs me" in a click. The blog covers timely, data-led pieces like current price caps, appliance running-cost rankings, and grant changes. Together they take you from understanding to a decision — without a paywall or an email sign-up.
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Ready to run the numbers?
Every guide links to free calculators so you can put exact figures on your situation — no email required.
Browse all 29 calculators