01 — METHOD & SOURCES
Every figure on this site, and where it came from.
A savings claim you cannot audit is marketing. This page exists so that an engineer, an architect or a sceptical spouse can check our working and disagree with it precisely.
25
locations modelled from primary yield data
11
assumptions declared in full below
0
figures from a competitor brochure
Four markets where we refuse to quote payback
Dubai, Abu Dhabi, Riyadh, Doha — Gulf / subsidised tariffs.
02 — ASSUMPTIONS
What we assumed, and why it is conservative.
The arbitrage capture rate of 55% is the clearest example: a perfect trader would capture close to 100% of the spread, and no real system does.
03 — SOURCES
No figure on this site comes from a competitor’s brochure.
Where we could not obtain primary data — for instance a household spot market in Cyprus or Qatar — we claim nothing rather than estimating.
04 — LIMITATIONS
What these figures are not.
- 01
They are not a quotation
Site works, groundworks, grid connection charges and VAT are excluded and vary substantially by property.
- 02
They are not a guarantee of trading income
Wholesale spreads reflect a temporary scarcity of flexibility. We size every case so that it remains defensible on self-consumption alone.
- 03
They do not model your actual consumption profile
The simulator uses a smooth household profile. A house that cooks at 19:00 and charges a car overnight behaves differently from one that runs a workshop at midday.
- 04
They assume no shading
A pavilion under a mature oak will underperform these figures materially. Shading is assessed on site.
- 05
They exclude tariff and policy change
Where a change is already legislated — Dutch net metering ending in 2027 — we have used the post-change position.