Plug-in solar costs, savings and payback explained Plug-In Solar Compare Plug-in solar costs: how sensitive is your payback? The same purchase can look attractive or disappointing depending on the assumed annual saving. The table uses a fictional £600 complete cost to make that sensitivity visible. None of these rows is a household forecast, and simple payback excludes maintenance, financing, replacements and changes in tariffs or generation. [ ] £40 £600 ÷ £40 15 years Notes: ______________________________ [ ] £60 £600 ÷ £60 10 years Notes: ______________________________ [ ] £80 £600 ÷ £80 7.5 years Notes: ______________________________ [ ] £100 £600 ÷ £100 6 years Notes: ______________________________ A personal purchasing checklist, not confirmation of suitability, permission or safety. Guide sources checked: 2026-09-06. Check current guidance and exact product information before purchase. Read the full guide: https://pluginsolarcompare.co.uk/guides/plug-in-solar-costs-savings