Worked examples, not case studies
SEO Dons (SEO-DONS LTD) publishes this guide and does not install renewable energy systems, so it has no client projects to show. An earlier version of this page described modelled scenarios with savings, paybacks and contract wins. Modelled figures are not results, so those scenarios have been removed.
Where to find the arithmetic instead
- The cost guide sets out indicative price ranges for each technology.
- The savings calculator gives an upper-bound solar estimate from your own electricity spend.
- Three modelled scenarios with the assumptions shown are on the commercial buildings page.
- A roof-sizing example with the arithmetic shown is on the small business page.
- A let-building example for owners is on the commercial landlords page.
How to judge any case study you are shown
Ask whether the client is named, whether metered before-and-after data is shown, whether the date and the installer are given, and whether the figures include the funding route. A case study that cannot answer those is a model, and should be labelled as one.
Five checks for any case study
- Named client or not. An anonymous case study cannot be checked, so treat its figures as marketing.
- Metered data. Look for before-and-after half-hourly or monthly meter readings, not a modelled saving.
- Date and duration. A saving measured over one summer says little about a full year.
- What else changed. Tariff changes, opening hours and efficiency work all move a bill; the case study should separate them from the new equipment.
- The funding route. Payback on a cash purchase, asset finance and a PPA are different numbers, so the comparison should use the same basis.