Finalises the handover doc after S0380.49 ships the effective-monthly
Table 12e PE factor for the PV split. Full cohort residual trajectory
table across all four milestones (pre-44 / post-45 / post-48 /
post-49), final cross-cascade architecture diagram, and the punch-list
of open work (β fine-tuning, HP electricity demand, monthly E_PV
distribution) — none in the β-split phase scope, each a candidate
follow-up slice.
Cluster PE residual closed by ~50% magnitude over the phase:
-7..-14 → -2.8..-3.7 kWh/m². CO2 all <0.11 t/yr; SAP all exact.
Updates the PV β-split handover doc after the three new slices land:
- S0380.47 cost cascade wiring (zero cohort impact via Table 32 collapse)
- S0380.48 real-API battery_capacity schema gap (cohort PE +2.7..+8.1
→ -3.5..-4.5)
- Restates the open slice (S0380.49) as wiring effective-monthly
Table 12e PE factor into the PV cascade — the remaining ~4 kWh/m²
PE delta is structural (currently uses annual factors instead of
monthly-weighted).
Key narrative correction: the prior handover's "E_PV magnitude bug"
hypothesis ("cascade thinks 2570 kWh/yr vs worksheet 831") was wrong.
Reading the cert 0380 worksheet PDF directly (dr87-0001-000899.pdf
page 3 line 233) shows -2563.3692 kWh/yr — matching our cascade
exactly. The real bug was the schema dropping flat-shape
battery_capacity, fixed in S0380.48. Lesson captured in the doc:
verify handover-cited numerics against the source PDF before
implementing the prescribed fix (same discipline as spec-floor
skepticism applied to handover claims).
Includes the full PE residual cohort table across all three milestones
(pre-44 / post-45 / post-48) and the Slice 6 implementation outline.
Documents progress on the SAP 10.2 Appendix M1 β-factor split for the
PE / CO2 / cost cascades + golden-fixture residual closure.
Shipped:
- Slice 1 (S0380.44): pure β-factor calculator module + 13 unit tests
- Slice 2 (S0380.45): wire β into PE cascade
- Slice 3 (S0380.46): wire β into CO2 cascade
Cert 9501 (PV no battery): PE Δ -8.28 → +0.25, CO2 Δ +0.20 → -0.05 —
clean spec validation. The 7-cert ASHP+battery cohort overshoots PE
by +2.7..+8.1 because the cascade's E_PV is ~3× the worksheet's
value (cert 0380 cascade 2570 kWh vs worksheet 831 kWh). E_PV
magnitude audit deferred to Slice 5.
Open:
- Slice 4 (S0380.47, next): wire β into cost cascade
- Slice 5 (S0380.48): E_PV magnitude audit
- Slice 6 (S0380.49): re-pin fixtures + verify chain tests <1e-4
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
