Resilience
Power-cut protection
Why solar switches off in a cut, the five levels of backup, and what homes and businesses should protect first.
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Know your system before you buy it
Each guide answers one question properly, with current UK prices and worked examples.
Home
Lowering your bills
The ROI calculator, how the sums work, and how solar compares with savings, investments and a loan.
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Fundamentals
System types compared
On-grid, hybrid, automatic switchover and off-grid, with diagrams and typical costs.
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Fundamentals
Solar sizing
How many panels a home needs, small ground-mounted arrays, and 12V sizing for narrowboats and campervans.
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Batteries
Battery systems
kWh and kW, what a kWh of storage costs today, and how to judge a warranty.
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Tool
System finder
Tick your appliances, set the hours, and see which systems and batteries fit your budget.
Open the finder