Install solar yourself. Save £5,000+.
Step-by-step DIY solar guides for UK homeowners. No jargon, no sales pitch, honest advice from people who have actually done it.
Everything you need to go solar
Practical guides, honest comparisons, and free tools -- written for people doing it themselves. No installer sales pitch.
Complete Installation Guide
From sizing your system to wiring your inverter. Every step explained for UK regs.
Read guideSolar Savings Calculator
Work out your payback period based on your roof, location, and electricity usage.
Try the calculatorBest Solar Kits Compared
We compare the top DIY solar kits available in the UK on price, quality, and what's actually worth buying.
Compare kitsGrants & Incentives
ECO4, the Smart Export Guarantee, and 0% VAT. We explain exactly what you can claim in 2026.
Check eligibilityBattery Storage
Is home battery storage worth it? Compare prices, capacities, and payback for UK homes.
Learn moreInverter Buyer's Guide
String vs microinverters, sizing correctly, and the best models for UK systems.
Read guideFree solar tools
No sign-up, no paywall. These calculators are built by someone who actually installs solar, and they work.
Solar Savings Calculator
Work out your system size, annual generation, and payback period. Uses UK irradiance data and current electricity prices.
Try it freeVictron MPPT Calculator
Enter your panel specs and string config. Get the exact SmartSolar model you need with temperature-adjusted voltage calculations.
Calculate nowDC Cable Sizing Calculator
Work out voltage drop and minimum cable size for your DC runs. Critical for safe, efficient solar wiring.
Size your cablesLatest guides
Deep dives into Victron hardware, real installation walkthroughs, and practical money-saving tips.
Victron MPPT Comparison
Every SmartSolar model from 75/15 to 250/100 compared. Specs, pricing, and which to pick for your setup.
Compare modelsVictron MultiPlus Comparison
Inverter-chargers from 800VA to 6500VA. Fan noise fixes, parallel config, and which unit for your home.
Compare MultiPlusDIY Powerwall Build Guide
Build a 14kWh home battery from salvaged EV cells for under £1,500. Sourcing, BMS, fusing, and UK regs.
Build your ownBalcony & Plug-in Solar UK
Legal from April 2026: the 800W rules, DNO notification, and the best plug-in kits for flats and renters.
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