Solar Energy Concepts

DIY Solar for UK Homes - Real Guides from a Real Installation

Step-by-step practical guides, component lessons, and hard-earned fixes from real UK DIY solar projects.

Latest Articles

~10% capacity loss after 3 years and 600 cycles. Well within the 4,000-cycle warranty. At this rate, 80%+ capacity at the 10-year mark.
You can add a pack later, even at different cycle count. The BMS recalibrates. I did it, and the readings have since converged.
How I charge: Octopus Go + Solar Assistant automation. Saves £1,668/year. The setup details are in this article.
Honest drawbacks included. Winter balancing drift, BMS firmware update, and how the fix works.

Read Entry →

Outgoing Fixed (12p/kWh) is simplest and suits most solar-only homes.
Agile Outgoing can outperform Fixed if you shift export into high-price windows.
Flux (28.60p peak export) is best for battery owners who can discharge during 4–7pm.

Read Entry →

Use this as a pre-buy checklist while UK plug-in solar standards finish rolling out.
Prioritise compliance and component quality over cheap kit marketing claims.
Buying right once beats buying early twice when rules and product labels are still evolving.

Read Entry →

Plug-in solar is simple in concept: panels generate DC, microinverter converts to AC, home uses it first.
Safety and compliance still matter even for small systems.
Understanding the flow helps avoid bad purchases and unrealistic savings expectations.

Read Entry →

Plug-in solar is confirmed, but technical details (limits and product standards) are still being finalised.
Key dates: April rule change, July product standard window, October transition end.
Use this guide before buying so your kit remains compliant and export-ready.

Read Entry →

Use the calculator to estimate your numbers based on your setup.
Yes, it’s worth it. A 16.1kWh battery on Octopus Go pays for itself in 3.2 years — no solar panels needed.
Save £5,200–£7,700+ over 16 years using cheap overnight electricity and discharging during peak hours.
System cost ~£3,300 (battery + inverter + electrician). 0% VAT until March 2027.
New in April 2026: BS 7671 Amendment 4 introduces Chapter 702 — the first UK wiring standard for home batteries.
Best tariff: Octopus Go (7.5p overnight → ~28.5p peak = 21p spread). Start with battery, add solar later.

Read Entry →

Zero Bills is not free energy. The hardware cost is paid upfront through the home price or retrofit finance.
Octopus uses approved premium hardware. That makes it a different comparison to most budget DIY builds.
You trade control for simplicity. Octopus manages optimisation; DIY gives you full manual control.
Best fit for new builds. Retrofit can still work, but the economics are less clear.

Read Entry →

Panel prices are lower than most people expect — around £0.50/W to £0.70/W for a quality panel.
Price per watt is only part of it — warranties, degradation, and supplier reliability matter too.
Timing matters in 2026 — the China export rebate ends April 1, which will push costs up.
Buy on value, not hype — this guide shows you how.

Read Entry →

South-facing roofs deliver the highest annual yield for typical UK domestic systems.
Midday production peaks can exceed daytime demand, so storage/export strategy is key.
This guide gives practical system sizing for a 4-bed home with realistic budget ranges.

Read Entry →