Roadmap

Under development

Review & Update-Me

Stages, Status and Icons

Stages

Planning: Items that have not yet been started
Design: Scoping & user experience design
Develop: Actively building
Test: Testing and iterating
Beta: Release for optional use, may have rough edges or additional features in development
Release: Stable release
Public Beta: Release for optional use, may have rough edges or additional features in development
Full Release: Stable public release

Status

Completed

Work In Progress

In Queue

Icons

start timestamp

end timestamp

input optional parameters

∡ Tilt angle

↻ Orientation angle

∡ Inclined irradiance components

⭸ Horizontal irradiance component

⦜ Normal (right) angle

⭍ Effective irradiance

% Fraction (i.e. for sky-view fraction)

⌁ Power

㎾ Power unit

㎾h Energy unit

⌇ Irradiance

⌇% Relative irradiance

W/m² Irradiance unit

Input¶

Read input arguments, parameters and data

Read functions	Plan	Design	Develop	Test	Beta	Optimise	Release
Read input required arguments
Read start timestamp for time series
Read end timestamp for time series
Read input optional parameters
Read ∡ Tilt angle
Read ↻ Orientation angle
Identify geographic location
Read geographic location Longitude
Read geographic location Latitude
Read input (data, arguments)
Read input data [solar irradiance, meteorological variables, elevation]
Read input data solar irradiance
Read external data time series (ex.: SIS, SID)
Read input data meteorological variables
Read input temperature
Read input wind speed
Read input elevation data
Read input horizon data (or calculate on-the-fly?)

Calculations¶

Calculate solar geometry variables, solar irradiance components, photovoltaic performance

Calculation functions	Plan	Design	Develop	Test	Beta	Optimise	Release
Generate time series based on user input `start` and `end` timestamps
Set default ∡ Tilt angle
Set default ↻ Orientation angle
Calculate horizon data on-the-fly (alternative to Read input horizon data)
Calculate/Identify shading [Shade]
Select energy model
Calculate global irradiance
Read spectral correction values
Calculate solar geometry variables ¹
Identify solar position [Above horizon, Low angle, Below horizon]
Optimise tilt² if requested
Optimise tilt² and orientation³ if requested
Set tilt and orientation depending on tracking type ?
Calculate total radiation
Calculate system performance

Output¶

Output

Output quantities and attributes	Plan	Design	Develop	Test	Beta	Optimise	Release
ϑ Longitude
ϕ Latitude
Elevation
∡ Tilt
↻ Orientation
Timestamps
Time zone (if user requested a local time)
⌁ Power
Energy (aggregated time series of PV power series)
Efficiency %
Loss
Global irradiance
Global broadband inclined ∡
Global broadband horizontal modelled ⭸
Global broadband horizontal read from external source ⭸
Globel spectrally resolved inclined irradiance
Direct
Direct irradiance effective ⭍
Direct inclined ∡
Direct horizontal irradiance modelleld ⭸
Direct horizontal read from external source ⭸
Direct normal irradiance ⦜
Diffuse irradiance
Diffuse irradiance effective 🗤⭍
Diffuse inclined irradiance ∡
Diffuse horizontal irradiance modelled ⭸
Diffuse horizontal calculated from external source ⭸
Diffuse clear sky irradiance ☀
Reflected irradiance
Reflected irradiance effective ☈⭍
Reflected ∡
Extraterrestrial irradiance
Extra ⦜
Extraterrestrial normal irradiance ⦜ modelled
Solar geometry variables
Overview ⦩⦬ solar position parameters for a moment or 📈 time series
⭸ Solar incidence angle
🕛 🌐 Hour angle (ω)
🌅 Hour angle (ω) at sun rise and set angle
⦬ Solar azimuth angle
Solar zenith angle
∢ Solar declination angle
⦩ Solar altitude angle
Other quantities
Refracted altitude
Albedo constant modifiable
Sky view fraction %
Solar constant modifiable
Perigee constant modifiable
Eccentricity modifiable
Linke′ turbidity adjusted
Linke turbidity
Rayleigh index
Air mass index
Metadata
Efficiency Algorithm
Irradiance source
Incidence algorithm
⯐ Positioning algorithm
⏲ Timing algorithm

Help ¶

Introduction in to ..

Command / Subject	Introduction subcommand	Description
`power`	`intro`	A short primer on photovoltaic performance
`irradiance`	`intro`	A short primer on solar irradiance
`position`	`intro`	A short primer on solar geometry

See also detailed Implementation for Solar Position ↩
In PVGIS <= 5.x and older, tilt is referred as slope angle ↩↩
In PVGIS <= 5.x and older, orientation is referred as aspect angle ↩