{
 "about": "Modeler lesson M3: the choices the lesson offers and its reference results. The model is lesson 13's planning LP (13-capstone.json holds its costs and sources); the year is town_year.json (2025) and the second weather year m03-capacity-expansion-2024.json. The reference block is written by node _tests/learn/test_m03-capacity-expansion.js --write and re-solved by the same test on every run.",
 "accessed": "2026-11-03",
 "cap": 200,
 "sets": [
  {
   "id": "typ4",
   "label": "4 typical weeks",
   "short": "4 typical",
   "perSeason": 1,
   "extremes": [],
   "live": true
  },
  {
   "id": "wk7",
   "label": "4 typical + 3 extreme weeks",
   "short": "4 + 3 extreme",
   "perSeason": 1,
   "extremes": [
    "peak",
    "netpeak",
    "calm"
   ],
   "live": true
  },
  {
   "id": "typ8",
   "label": "8 typical weeks",
   "short": "8 typical",
   "perSeason": 2,
   "extremes": [],
   "live": true
  },
  {
   "id": "wk11",
   "label": "8 typical + 3 extreme weeks",
   "short": "8 + 3 extreme",
   "perSeason": 2,
   "extremes": [
    "peak",
    "netpeak",
    "calm"
   ],
   "live": false
  },
  {
   "id": "wk15",
   "label": "12 typical + 3 extreme weeks",
   "short": "12 + 3 extreme",
   "perSeason": 3,
   "extremes": [
    "peak",
    "netpeak",
    "calm"
   ],
   "live": false
  }
 ],
 "storage": {
  "set": "wk7",
  "cap": 200,
  "energyCapex": 20,
  "energyCapexNote": "An illustrative what-if, not a forecast or a sourced cost: battery energy at $20 per kWh (lesson 13 uses the sourced $247.34 per kWh in 2025 dollars, NREL's $241 in 2024 dollars converted, in 13-capstone.json, techs.battery), chosen so that the solver builds a battery large enough for the three rules between weeks to differ.",
  "modes": [
   "linked",
   "cyclic",
   "free"
  ]
 },
 "reference": {
  "about": "Written by node _tests/learn/test_m03-capacity-expansion.js --write; re-solved by the same test on every run. Costs in $ a year, CO2 in t a year, energy in MWh, power in MW.",
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 }
}