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docs: finalise 2130 as 0240-like — PV β-split proven exact

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Updated 2130's pin notes with the case-18 finding: our cascade reproduces
the worksheet PV split to the decimal (gen 2684.17 / onsite 970.77 / export
1713.40), so the Appendix M1 β-split is exact, not the suspected bug. With
the gas PE factor also exact (1.13) and the wall measurement now wired
(S0380.215), 2130's +2/-11.72 is the irreducible API-only lodged residual
(0240-like), not a closable calculator bug. Notes-only; pin unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Khalim Conn-Kowlessar 2026-06-04 11:04:47 +00:00
parent 712cc6f3f8
commit 6b4f1aec44
1 changed files with 11 additions and 4 deletions
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15
tests/domain/sap10_calculator/rdsap/test_golden_fixtures.py
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@ -456,10 +456,17 @@ _EXPECTATIONS: tuple[_GoldenExpectation, ...] = (
"(less wall loss). This SPEC-CORRECT fix EXPOSED the offsetting "
"PV-β / gas-combi-PE under-count it had been masking: cont SAP "
"83.35 → 83.78 (resid +1 → +2), PE -7.56 → -11.72, CO2 -0.045 "
"→ -0.095. The exposed -11.72 PE (~-746 kWh/yr) is the same "
"deferred gas-combi-PE + PV-β-credit under-count from S0380.45/"
".49 — now un-masked. Closing it is the next slice (needs the "
"deferred PV/combi-PE work + ideally a 2130 worksheet)."
"→ -0.095. INVESTIGATED the exposed -11.72 PE (~-746 kWh/yr) "
"against simulated case 18 (a TFA-64 base + 2130's exact PV: 2× "
"2.04 kWp SE/NW, overshading 1/2): our cascade reproduces the "
"P960 worksheet's PV split EXACTLY — gen 2684.17, (233a) onsite "
"970.77, (233b) export 1713.40 to the decimal. So the Appendix "
"M1 β-split is NOT the bug; the gas PE factor is also exact "
"(Table 12 mains gas 1.13). 2130's residual is therefore the "
"irreducible API-only lodged gap (Elmhurst's own residual), "
"0240-like — NOT a closable calculator bug. The +2/-11.72 is "
"the spec-correct state once the masking wall bug is removed. "
"Leave it; do not chase."
),
),
_GoldenExpectation(