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0.11.0 shipped `pv_entity` as a single string. The reference site's owner reported within minutes of it going live that they have several PV inverters and could configure one - which is ordinary for a multi-string roof, not a property of one house. `pv_entities` is the roster and the row carries the SITE total. ⚠️ THE HARD PART IS ABSENCE, NOT THE LIST. Three configured, one `unavailable`, and the sum of the other two is a SMALLER NUMBER INDISTINGUISHABLE FROM A REAL ONE. Read back by OPT-10 that says "there was less PV than there was" - the "no irradiance" conclusion the channel exists to TEST. So `pv.total()` answers `None` the moment any configured entity is absent: the topic carries HA's own `None`, the entity goes to `unknown`, the recorder records a GAP. The alternative (the partial sum beside a contributor count) was implemented and run as mutation N1b; it loses because the MQTT row is read COLD a week later by an attribution that would believe it, while the qualifying count would live in a second entity with its own history. The partial information is not thrown away - the STATUS PAGE names every entity that reported, with its watts, and every one that did not, with its reason, because that surface is read LIVE by a human who wants the diagnostic. ⚠️ AND THE MIRROR: a member honestly reporting 0 W is SUMMED. The test is `is None`, never falsiness - a roster that blanked the site on a zero would report an absence on every clear evening. THE SURFACE IS MEASURED, NOT PREFERRED. `pv_entity` could not become a list: tools/supervisor_shape_probe.py §G shows Supervisor 2026.08.0 answering an 0.11.0 install's stored string with `Invalid list for option 'pv_entity'`, and deepmerge's list strategy is `override` so a `[]` default does not rescue it - the live add-on would not start. `match(.*)?` does accept both shapes and is rejected for a different, measured reason: it validates nothing (a string, a list and the integer 417 all pass) and renders as a plain text box. So `pv_entities` joins `pv_entity` and REPLACES it when set, CFG-04's rule for `inverters:`, with a status caution saying which key won - a union would double-count the inverter the old key still names. STILL NOT A CONTROL INPUT. tools/tel11_pv_trace.py was extended rather than replaced and now grades five claims over three document sets. The control hash is UNMOVED - 846a10a5b89e… on `unset` and on `one`, on both trees - and the roster control document is byte-identical between the two trees. 2/5 is a claim TEL-11 could not make: with 0.11.0 as the baseline, "one entity behaves exactly as 0.11.0 does" is a real cross-tree identity over control AND telemetry. ⚠️ TEL-11's OWN `--compare` REFUSAL HAD TO CHANGE, and that is MUTATION.md habit 24: a discriminator defined as "the baseline lacks this feature" dies on the release that ships the feature, and dies as a false refusal. Twelve mutations, each on a fresh purged `cp -a`, no survivors. N5 is +0 B (`sum` -> `max`, the same three characters) and was run on a fresh copy with `cmp` confirming the edit on disk. The fixture is three distinct NON-ZERO contributions in two units with absence driven at EVERY position - a member contributing 0 W could go absent without moving the sum of the rest, which is habit 23 with a coinciding value in the arithmetic rather than in the plant. 31/31 in the CI image. Not deployable as merged: config.yaml stays at 0.11.0, so predeploy_check.py reports a NO-OP until PKG cuts a version. A CHANGELOG entry is wanted and deliberately not written - 11b forbids `## Unreleased` and the bump is PKG's call; DECISIONS/TEL-12-several-pv-inverters.md is the material it needs. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BwRLw7eKYj2byVdwB6kbjU