Guides
The questions people actually ask first
Four long-form guides covering the decisions that involve the most money and the most sales pressure. Each one sets out what changes the answer, what to ask an installer, and the mistakes that cost the most.
Last reviewed: September 2026
Read the guides
- Solar8 min read
How much do solar panels cost in the UK?
What sits inside an installed price, why two quotes for the same roof differ by thousands, and which line items to challenge before you sign.
- Solar8 min read
Are solar panels worth it?
Which households see a strong return, which see a modest one, and the four variables that decide the answer for your house.
- Batteries7 min read
Is a home battery worth it?
Usable capacity, round-trip losses, cycles and the price gap between cheap and peak hours. The arithmetic that decides storage.
- Heat pumps9 min read
Is my house suitable for a heat pump?
Heat loss, emitters, flow temperature and siting. What a proper survey checks, and the shortcuts that produce cold, expensive systems.
How to use them
Each guide is written for someone about to spend several thousand pounds of their own money. They are deliberately numerate and deliberately sceptical, in both directions: a sales claim and a doom claim get the same treatment.
Where a figure depends on your house, your tariff or your quote, we say so rather than invent a national average. The calculator is the faster route to a number you can defend.
Get a number, not just an argument
The solar savings calculator answers the cost and payback questions directly, using figures you control and assumptions you can see.