EX12 — Power Sizing¶

Tags: power · sizing variants · frozen driver Input: power-sizing.yaml · Runtime tier: standard · Recommended views: Power, Analysis

Purpose¶

Compare solar-array and battery changes against the same frozen power driver so generation and storage trades remain directly comparable.

Setup¶

A single satellite runs for 24 hours with a deliberately undersized baseline. Three variants change array area, battery capacity, or both.

astraeus run astraeus-resources/examples/user/power-sizing.yaml

RunSpec Focus¶

Sizing variants are local overrides on one baseline. This preserves the orbit, attitude, load, initial state, and cadence across every comparison.

power:
  sizing:
    enabled: true
    variants:
    - id: larger-array
      overrides: {power: {panel_area_m2: 0.5}}
    - id: larger-battery
      overrides: {power: {battery: {capacity_wh: 900}}}
    - id: larger-array-and-battery
      overrides:
        power: {panel_area_m2: 0.35, battery: {capacity_wh: 900}}

Results¶

The reference run completed successfully in 0.42 seconds and evaluated all three variants. The baseline was infeasible. The larger battery still fell below the 25% minimum (21.26%); the larger array reached the 100% upper boundary. The combined variant remained between 64.70% and 72.23% and was feasible.

State-of-charge range for the baseline and three sizing variants

Artifacts To Inspect¶

Artifact	What it shows
`power/sizing/sizing_summary.json`	Variant status and the location of each result bundle
`power/power_summary.json`	Baseline state-of-charge range and infeasibility
`power/sizing/<variant>/power_summary.json`	Comparable feasibility and energy rollups for each variant
`power/sizing/<variant>/timeline_power.parquet`	Variant-specific generation, load, and state-of-charge timeline

Interpretation¶

More generation and more storage solve different problems. Array-only sizing can trade energy deficit for excess generation, while storage-only sizing cannot fix a persistent generation shortfall. The balanced variant closes both sides of this particular energy cycle.