Biomass steam in both plans, PV on the factory roof only

User, 17 Oct 2026: "only put solar on the factory, prepare the other
buildings for solar, option a and b should operate on biomass".

- Steam: two 500 kg/h biomass modules (Getabec class, 6M to 10M THB) plus
  a fuel store and handling block (1M to 2M, estimate) in both plans; the
  electric bank becomes the alternative. ~0.67M THB of fuel a year against
  ~4.9M for electric steam; grid demand ~264 kW instead of ~980 kW.
- Solar: ~520 kWp on the factory roof (the biomass-case optimum is ~500 to
  550 kWp, hourly sketch in sustainability.md "PV size with biomass
  steam"); office roof and parking canopies built PV-ready (~120 kWp
  later). ~87 % used on site, ~61 % of the plant's electricity.
- Calculator: biomass default, bFuel row, pvKWp 520, pvSelf 87, iso fills
  the factory roof first and shows the other roofs as PV-ready.
- Numbers: launch plant ~168M / 232M / 296M with contingency; Plan A
  ~182M (~2M above 180M: the Chinese-route lever priced only electric
  boilers; a Chinese biomass quote is the way back), Plan B ~217M (label
  ~215M), ~35M more. Calculator EBITDA A 2.17M, B 2.23M USD.
- CSV, total-investment, revenue-model, sustainability, scale, biomass,
  site-candidates, boi, steam-cooling, construction RFQ (canopies
  PV-ready), README, roadmap; business plan draft 0.3 rebuilt (A and B
  63 pages) with new renders.

docs/boi.md

@@ -26,7 +26,7 @@ top through the upgrade measures, where this project happens to be strong:
   THB 12M per MW
   ([B Global Law](https://bgloballaw.com/2026/01/18/boi-announcement-no-3-2568-amendment-to-renewable-energy-efficiency-enhancement-measures),
   [Smarter Energy Solution](https://smarterenergysolution.com/blog/boi-solar-thailand-2026),
-  checked October 2026). So owning the ~640 kWp array earns no BOI
+  checked October 2026). So owning the ~520 kWp factory-roof array earns no BOI
   benefit; its case is the bill (see [sustainability](sustainability.md)).
   Whether the 271 kWh battery qualifies is for the BOI consultant. A PPA
   developer selling solar power (200 kW or more per distribution point)