Solar on every roof, BOI solar correction, open source section

Solar (user, 17 Oct 2026: "use as much roof space as possible")
- PV on every roof and canopy: ~640 kWp on the Payap scenario plot
  (factory roof ~523, canopies ~54, flat office roof ~65 kWp around the
  AC units); ~300 kWp on the Mueang Chi hall. Calculator: pvKWp 640,
  new pvSelf 85 % (zero export, hourly sketch), PV cost per kWp times the
  array, office-roof PV in the iso view, roofs drawn full.
- 12.8M to 16.6M THB at 20 to 26 THB/W; CSV baseline 34.37M to 56.34M;
  launch plant ~168M / 231M / 294M THB with contingency; Plan B ~216M
  (label ~215M), ~39M above Plan A; Plan A unchanged (it leases the
  array), its solar lever ~17.5M. PV payback ~4.2 to 5.9 years.
- Permits (rooftop solar no factory licence since 28 Dec 2024, ERC
  exemption under 1,000 kVA, PEA zero export) and PPA discounts sourced
  in sustainability.md.

BOI correction
- Announcement 3/2568 (in force 1 July 2025) ended BOI promotion for
  solar installations; only the battery may qualify (12M THB per MW cap).
  Removed the "BOI solar measure" from boi.md, total-investment,
  revenue-model, sustainability, site-candidates and both plan versions;
  Plan B's case for owning the array is the PPA bill it avoids
  (~0.07M USD a year).

Open source (user, 17 Oct 2026)
- digital-factory.md "Open source throughout, and working with other
  plants": everything we run and build is open source on NixOS, our code
  published (licence to decide), vendor firmware the stated exception;
  later the stack and factory-automation services for other pressing
  plants, not in the revenue.
- Business plan section 5.6 plus an executive-summary bullet, reading
  guide and not-modelled mentions; draft 0.3 rebuilt (A 60, B 61 pages),
  renders re-made with the roofs full.

docs/finance/total-investment.md

@@ -51,7 +51,7 @@ on two shifts (estimate: the [scale](../scale.md) basis gives ~0.71 to
 | Cutting room: Sillitoe SDMS, spare cutterhead and support, mastering console and chain, monitoring, room build-out | 200k – 350k | 6.6M – 11.6M | SDMS list price USD 125k (ex tax and shipping); the rest estimate |
 | Metrology and QC stack (XRF, laser confocal, wide-area profiler, inline vision on three presses, audio station) | 350k – 810k | 11.6M – 26.7M | estimate, phaseable ([quality automation](../quality-automation.md)) |
 | PVC lab, day-one tier | 55k – 150k | 1.8M – 5.0M | estimate, [quality automation](../quality-automation.md) |
-| Utilities, solar, battery, HVAC, clean zones, racking | 835k – 1,439k | 27.6M – 47.5M | [utilities CSV](utilities-investment.csv) baseline re-sized for three presses: chiller bank two modules instead of three; solar at 20 to 26 THB/W installed and the battery installed (Thai market prices checked October 2026, sources in the CSV) |
+| Utilities, solar, battery, HVAC, clean zones, racking | 1,042k – 1,707k | 34.4M – 56.3M | [utilities CSV](utilities-investment.csv) baseline re-sized for three presses: chiller bank two modules instead of three; PV on every roof and canopy (~640 kWp, user decision 17 October 2026) at 20 to 26 THB/W installed and the battery installed (Thai market prices checked October 2026, sources in the CSV) |
 | Building ~1,500 m² plus civil and site works | 650k – 1,100k | 21.4M – 36.3M | estimate at 12,000 – 20,000 THB/m² plus ~20 % site works; soil is the main variable |
 | Overhead crane, runway, frame premium, machine door | 97k – 227k | 3.2M – 7.5M | estimate, [crane, workshop and tours](../crane-workshop-tours.md) |
 | Maintenance workshop and machine bay fit-out | 30k – 76k | 1.0M – 2.5M | estimate, same |
@@ -61,9 +61,9 @@ on two shifts (estimate: the [scale](../scale.md) basis gives ~0.71 to
 | Cassette duplication and CD-R duplication | 55k – 190k | 1.8M – 6.3M | estimate, business plan sections 4.8 and 4.9 |
 | Freight, installation, commissioning, training (Pheenix, Sibert, Sillitoe, Newbilt beyond its quoted 5 days) | 150k – 300k | 5.0M – 9.9M | estimate |
 | Working capital, PVC stock, spares, lease deposit, first-year rent | 135k – 290k | 4.5M – 9.6M | estimate; land is leased, so no land purchase |
-| Subtotal | ~4.22M – 7.47M | ~139M – 246M | midpoint ~5.84M USD, ~193M THB |
-| Contingency 15 % | ~0.63M – 1.12M | ~21M – 37M | |
-| **Total, launch plant** | **~4.85M – 8.6M USD** | **~160M – 283M THB** | midpoint ~6.72M USD, ~222M THB |
+| Subtotal | ~4.42M – 7.73M | ~146M – 255M | midpoint ~6.08M USD, ~201M THB |
+| Contingency 15 % | ~0.66M – 1.16M | ~22M – 38M | |
+| **Total, launch plant** | **~5.1M – 8.9M USD** | **~168M – 294M THB** | midpoint ~6.99M USD, ~231M THB |
 
 Not in the total: a **reserve for the ramp-up** (staff hired before first
 revenue, overheads until volume covers them; ~10M to 20M THB, estimate),
@@ -78,7 +78,7 @@ import VAT paid at the border and reclaimed later (estimates).
 
 ### The investor's question: 180M THB, maybe 20 % more (October 2026)
 
-*Superseded by [Two plans](#two-plans-a-at-180m-thb-and-b-at-210m-thb-october-2026)
+*Superseded by [Two plans](#two-plans-a-at-180m-thb-and-b-at-215m-thb-october-2026)
 below. Written against the earlier Pheenix estimate (USD 320k to 650k,
 total ~227M THB at the midpoint); its galvanics lever is now the base
 price.*
@@ -131,7 +131,7 @@ building RFQ with a soil test, and distributor quotes for the metrology
 stack. Until they are in, quote **~216M THB** to the investor as the
 target with the levers above, and 180M as the low-quote case.
 
-## Two plans: A at ~180M THB and B at ~210M THB (October 2026)
+## Two plans: A at ~180M THB and B at ~215M THB (October 2026)
 
 Decided (user, October 2026): the business plan comes in **two
 versions** for the investor, built from the same documents:
@@ -139,12 +139,16 @@ versions** for the investor, built from the same documents:
 - **Plan A, ~180M THB**: the launch plant with every machine decided
   above (one Duplex system, one Classic, galvanics, Sibert, the cutting
   room), brought down with six cost levers.
-- **Plan B, ~210M THB**: the same launch plant, one Duplex system and
+- **Plan B, ~215M THB**: the same launch plant, one Duplex system and
   one Classic, with everything in: none of Plan A's six levers taken.
   First drawn as five presses at ~225M THB (Plan A plus 25 %); re-defined
   by the user on 17 October 2026 ("plan b should also only start with 1
   duplex and 1 classic, but with all levers"). In both plans the second
-  Duplex system is a growth step from revenue.
+  Duplex system is a growth step from revenue. On 17 October 2026 the
+  solar array was sized to every roof and canopy (~640 kWp, "use as much
+  roof space as possible"); that raised Plan B from ~208M to ~216M and
+  Plan A's solar lever from ~9.7M to ~17.5M, and left Plan A's price as
+  it was, because Plan A leases the array.
 
 Both are priced **without contingency** (user decision) and **with the
 ramp-up reserve**, because the reserve is cash the investor puts in
@@ -153,8 +157,8 @@ reference plus 20 % in both. Midpoints, estimates:
 
 | Plan A: launch plant with six levers | Saves | Subtotal after it |
 |---|---|---|
-| Launch plant, every block, no contingency | | ~192.8M THB (~5.84M USD) |
-| Rooftop solar and battery through a solar PPA (the installer owns and finances the array, the plant buys the power) | ~9.7M | ~183.1M |
+| Launch plant, every block, no contingency | | ~200.6M THB (~6.08M USD) |
+| Solar (~640 kWp on every roof and canopy) and battery through a solar PPA (the installer owns and finances the array, the plant buys the power) | ~17.5M | ~183.1M |
 | Metrology launch tier: XRF, inline vision and audio station at launch; laser confocal and wide-area profiler (USD 180k to 350k) bought from revenue | ~8.8M | ~174.4M |
 | Visitor corridor built later; no public tours at first | ~3.6M | ~170.8M |
 | Cassette and CD-R duplication later | ~4.0M | ~166.8M |
@@ -165,14 +169,14 @@ reference plus 20 % in both. Midpoints, estimates:
 
 | Plan B: the launch plant, everything in | USD | THB |
 |---|---|---|
-| Launch plant, every block, no contingency (the six lever items included: owned solar and battery ~9.7M, full metrology ~8.8M, visitor corridor ~3.6M, cassette and CD-R ~4.0M, bought crane ~3.2M, Thai boilers and compressor ~1.9M, together ~31M THB at the midpoint) | 4.22M – 7.47M | ~139M – 246M, **~192.8M (~5.84M USD)** at the midpoint |
+| Launch plant, every block, no contingency (the six lever items included: owned solar (~640 kWp) and battery ~17.5M, full metrology ~8.8M, visitor corridor ~3.6M, cassette and CD-R ~4.0M, bought crane ~3.2M, Thai boilers and compressor ~1.9M, together ~39M THB at the midpoint) | 4.42M – 7.73M | ~146M – 255M, **~200.6M (~6.08M USD)** at the midpoint |
 | Ramp-up reserve | | +10M to 20M |
-| **Plan B** | | **~208M THB (~6.30M USD): ~210M**, ~149M to 266M from the low to the high end of every block |
+| **Plan B** | | **~216M THB (~6.53M USD): ~215M**, ~156M to 275M from the low to the high end of every block |
 
-Plan B costs ~31M THB (~18 %) more than Plan A and, at the midpoint,
-stays within the investor's 180M THB plus 20 % (its high end, ~266M, does
-not). It keeps what Plan A leases or defers:
-owned solar and battery (and with them the BOI solar measure), the full
+Plan B costs ~39M THB (~22 %) more than Plan A and, at the midpoint,
+stays just within the investor's 180M THB plus 20 % (216M; its high end,
+~275M, does not). It keeps what Plan A leases or defers:
+owned solar on every roof and canopy and the battery, the full
 metrology stack from the first release, the visitor corridor and tours
 from the start, cassette and CD-R, the bought crane, Thai-supplied
 utilities with local service. Both plans have the same three presses and
@@ -186,22 +190,26 @@ both as presets.
 - **Contingency.** The blocks are budgetary (plus or minus 30 to 50 % on
   the estimates, top of this page), so the plans carry no buffer for
   quotes landing high. At this page's 15 % that would be ~24M THB on
-  Plan A and ~29M on Plan B at the midpoint.
+  Plan A and ~30M on Plan B at the midpoint.
 - The central hydraulic plant (not costed yet), the archive's mobile
   shelving (to quote), CD replication, financing costs, currency moves,
   and Thai duty and import VAT (the blocks assume BOI promotion).
 
 **What decides between them:** not demand, since both make the same
-records, but whether the investor funds ~31M THB more at launch for what
+records, but whether the investor funds ~39M THB more at launch for what
 Plan A leases or buys from revenue. On the modelled numbers Plan B's
-extra earns nothing (same EBITDA, more depreciation, a longer payback);
-its case rests on what the operating table leaves out: the BOI solar
-measure (only an owned array qualifies), full stamper metrology for the
-traceability pitch from the first release, tours and the Payap
-programmes from day one, cassette and CD-R sales, and utilities with
-local service. Most of Plan B's items can be added to Plan A later from
-revenue; the solar measure and the corridor are cheaper to have from
-the start. Both plans keep the second Duplex as a growth step, with its
+extra earns little: the same EBITDA in the revenue model (the calculator
+puts Plan B ~0.07M USD a year ahead, the PPA power bill its owned array
+avoids), more depreciation and a longer payback;
+its case rests on that bill and on what the operating table leaves out:
+full stamper metrology for the traceability pitch from the first release,
+tours and the Payap programmes from day one, cassette and CD-R sales, and
+utilities with local service. The BOI no longer promotes solar
+installations (Announcement 3/2568, in force 1 July 2025; only the
+battery may still qualify, see [BOI](../boi.md)), so owning the array
+earns no tax benefit, only the bill. Most of Plan B's items can be added
+to Plan A later from revenue; the corridor is cheaper to have from the
+start. Both plans keep the second Duplex as a growth step, with its
 floor, utility positions and ring-main tees reserved: ~15.4M THB at the
 midpoint for the system (~8.7M), a third chiller module CH-3 (~2.1M),
 their freight and installation (~1.2M) and the working capital for the