The authority on utility-scale solar power
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The Wiki-Solar Database holds many different parameters
The ratios we analyse and how they are calculated
The data we hold on each project enables us to calculate a number of key parameters related to the design and intended performance of utility-scale solar power plants.
These are based on the published data for the project (often at the time of design or installation) so actual operational ratios may differ.
Design performance ratio
Rated output capacity in MWAC ÷
Solar array capacity in MWP
Actual performance ratio will vary
Annual energy yield
Design output in MWh ÷
Rated output capacity in MWAC
Assuming standard irradiation levels
Annual energy yield ÷ average house electricity consumption
Varies with energy intensiveness of local households
Annual energy yield ÷ average carbon intensity of electricity
Varies depending on regional fuel mix for electricity generation
Emissions saving ÷ average annual emissions per car
Varies with regional fuel economy of vehicle fleet
Solar array (fenced) area ÷
Varies with latitude and type of mounting structure / tracking
Capital cost of project ÷
Based on published completion or resale cost - not necessarily equivalent
Non-equity finance ÷
Capital cost of project
Worldwide average ratios
The following table shows the worldwide averages as of March 2014.
Data for individual projects show that some ratios can vary substantially from these averages.
Varies geographically from 1,380 in Europe to 2,645 in South America
<200 in N America to >450 in Asia
<300 in France with low fossil-fuelled electricity
Only limited data for this ratio at present
Median is lower - some sites larger than needed
Decreasing from >$8m in 2008 to <$3m in 2014
We can calculate many of these ratios on a regional basis for continents, countries and even provinces, and we include this data in selected reports as shown here.
Where factors change with time, we also calculate ratios on an annual basis.
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