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Khalim Conn-Kowlessar 0bc9eac34c §5 slice 5: (68) appliances_monthly_w — Appendix L13/L14/L16a 
E_A = 207.8 × (TFA × N)^0.4714 (L13) chained through monthly factor
1 + 0.157 × cos(2π × (m - 1.78) / 12) (L14) then watts via × 1000 /
(24 × n_m) (L16a). Column A typical-gain form — 1.0× conversion. L16's
0.67× reduced form deferred (new-build DPER/TPER use).

Verified against Elmhurst U985-0001-000490 (68)m row to ≤5e-2 W
(display rounding from the (TFA × N)^0.4714 term).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 18:07:34 +00:00
..
domain §5 slice 5: (68) appliances_monthly_w — Appendix L13/L14/L16a 2026-05-20 18:07:34 +00:00
fetchers added potential file scaffolding: 2026-05-15 10:56:53 +00:00
repos added potential file scaffolding: 2026-05-15 10:56:53 +00:00
utils added potential file scaffolding: 2026-05-15 10:56:53 +00:00
README.md added potential file scaffolding: 2026-05-15 10:56:53 +00:00

README.md

Shared packages

Workspace packages consumed by services/*. Each package is its own Python distribution with its own pyproject.toml; services import via the workspace dependency mechanism ({ workspace = true }).

Package Purpose
domain/ Shared domain types — Property, BaselinePerformance, Plan, Scenario, EpcPropertyData, etc. No persistence, no IO, no business logic.
repos/ Persistence layer — one repo per aggregate. Owns the SQL. Depends on domain.
fetchers/ External API clients (gov EPC, Ofgem, Google Solar, etc.). Depend on domain for response shapes.
utils/ Cross-cutting infra — logging, S3, CloudWatch URL builders, SQS task helpers.

Adding a new shared package

Only when a real second consumer materialises. Don't pre-shatter (repos-epc, repos-property, ...) — split when a deployment needs to drop a dep, not before.

See ../ara_backend_design.md §11 for the broader monorepo layout and ../CONTEXT.md for the domain glossary that names the types living in domain/.