🔋 Energy & Renewables · Project Development

Keep production models honest

P50/P90 discipline, loss-tree transparency, and as-built model updates protecting projections.

advanced~35 minSolar EngineersEnergy AnalystsProject Developers

Steps

1Build loss tree explicitly: soiling, temperature, availability, clipping, line losses
2Quote P50 for engineering, P90 for financing; never blur them
3Update models with as-built equipment and measured first-year data
4Compare predicted vs actual monthly; investigate >5% persistent deviations
5Document every assumption change between model versions
6Feed O&M findings back into loss assumptions fleet-wide

Common Pitfalls

▲Cherry-picking sunny months as 'performance proof'
▲Models frozen at financial close despite field reality

Commands

Install with skills CLI

$ npx skills add aniruddhaadak80/skills --skill project-development-production-model-integrity

Install globally

$ npx skills add aniruddhaadak80/skills --skill project-development-production-model-integrity -g

Tags

#modeling#pvsyst#finance#energy-renewables#project-development

Install this skill

$ npx skills add aniruddhaadak80/skills --skill project-development-production-model-integrity -a opencode

SKILL.md

# Keep production models honest

> P50/P90 discipline, loss-tree transparency, and as-built model updates protecting projections.

## When to Use This Skill

P50/P90 discipline, loss-tree transparency, and as-built model updates protecting projections.

## Steps

1. Build loss tree explicitly: soiling, temperature, availability, clipping, line losses
2. Quote P50 for engineering, P90 for financing; never blur them
3. Update models with as-built equipment and measured first-year data
4. Compare predicted vs actual monthly; investigate >5% persistent deviations
5. Document every assumption change between model versions
6. Feed O&M findings back into loss assumptions fleet-wide

## Common Pitfalls

- Cherry-picking sunny months as 'performance proof'
- Models frozen at financial close despite field reality

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