Solar array power

Array power P = S₀ η A cosθ / r_AU². θ is 0° to 90° from the array normal. η is a user-selected efficiency.

SIDUS educational calculator. Category utilities. Tags: operations, power, satellite, utilities. Pure SI. Not flight software.

Formula

P = S₀ η A cosθ / r²

Solar array electrical power

Primary sources

SmallSat power subsystems (NASA SmallSat Institute): Solar-array inverse-square irradiance and cosine projection, and spacecraft power-subsystem context for end-of-life array estimates.
Solar irradiance science (NASA): Total solar irradiance at 1 AU. The array tool uses a fixed educational solar constant.

How do AI agents use this tool?

Read /llms.txt or call https://sidus.tools/api/mcp. Open the interactive page for live SI inputs.

Open interactive tool · SIDUS