Model/tests
Khalim Conn-Kowlessar ac77624d67 test(pv-battery): pin SAP cost-neutrality on export-capable standard tariff
End-to-end API-path regression pin for the battery behaviour validated by
the user-simulated Elmhurst worksheet pair (cert 001431 "simulated case
35/36", 5 kWh, export-capable, mains-gas, standard tariff). The official
SAP rating ("10a. Fuel costs - using Table 12 prices") values PV used-in-
dwelling and PV exported identically at 13.19 p/kWh (export code 60 ==
import code 30, ADR-0010), so a battery only redistributes PV between two
equally-priced lines: worksheet PV credit (252) = -455.6458 and SAP (258)
= 88.0859 are IDENTICAL with/without the battery (ΔSAP = 0).

Two tests over the committed RdSAP-21.0.1 corpus:
- standard tariff (meter 2): toggling the battery holds continuous SAP
  EXACTLY constant, while at least one cert's primary energy DOES respond
  (proving the App-M1 §3c β-split is wired, not a dropped battery).
- off-peak tariff (meter != 2): the battery STRICTLY raises SAP, because
  self-consumed PV displaces high-rate import (15.29) above the 13.19
  export credit — confirming the standard-tariff neutrality is a price
  coincidence, not a no-op.

Guards table_32 export price (code 60) and the battery β-split against
silent regression. Complements the unit-level β tests in
test_photovoltaic.py.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-14 09:51:34 +00:00
..
applications put db engine construction inside handler to avoid import errors in test 2026-06-09 15:18:42 +00:00
datatypes fix(mapper): map cylinder "No Insulation" to insulation_type=None 2026-06-08 09:52:06 +00:00
domain fix(electric-heaters): code-699 "electric heaters assumed" bills Table 12a direct-acting split 2026-06-14 09:16:22 +00:00
harness feat(modelling): wire secondary-heating-removal into the pipeline (ADR-0028) 2026-06-11 16:04:07 +00:00
infrastructure test(pv-battery): pin SAP cost-neutrality on export-capable standard tariff 2026-06-14 09:51:34 +00:00
magic_plan Migrate all MagicPlan tests to single new-format fixture 🟪 2026-06-05 12:59:56 +00:00
orchestration Merge branch 'main' of https://github.com/Hestia-Homes/Model into feature/junte+khalim 2026-06-12 13:45:30 +00:00
repositories Merge branch 'main' of https://github.com/Hestia-Homes/Model into feature/junte+khalim 2026-06-12 13:45:30 +00:00
utilities added floats helper 2026-06-12 14:28:41 +00:00
__init__.py added postcode splitter rewrite to ddd 2026-05-19 16:35:09 +00:00
conftest.py Audit generator populates XLSX, uploads to S3, and records UploadedFile row 🟪 2026-06-09 12:05:55 +00:00
test_lambda_packaging.py more tests to ensure we don't deploy something that is brokern 2026-06-02 15:03:20 +00:00