# Changelog

## 0.1.0

First packaged release. Ports the control loop and the monthly maintenance
cycle from the reference Home Assistant implementation into an add-on.

- Grid-following control: gain/slew/clamp/deadband with anti-windup, all tuned
  against measured hardware behaviour (see FIELD-GUIDE.md §14).
- Saturation freeze **with the duration term** — three consecutive diverging
  cycles, not one. The instantaneous test fires on every large correction,
  because the plant itself needs 3-6 s to settle.
- Monthly maintenance cycle as an ownership state machine: drain / charge /
  hold, with exactly one writer of the setpoint at any moment.
- Capacity-tariff awareness: the maintenance charge is capped by quarter-hour
  peak headroom, and peak shaving outranks the maintenance schedule.
- Failsafe behaviour: commands 0 W on missing inputs, on stop, and on shutdown.
  Never replays a stale setpoint - the reference implementation did, and the
  hardware watchdog cannot catch that.
- Ingress UI with a commissioning checklist that names problems in words.
- Optional MQTT discovery for status entities.

Known limits:

- Home Assistant OS / Supervised only (add-ons cannot run on Container/Core).
- The inverter protocol is reverse-engineered; no vendor contract.
- Without the optional RS485 e-stop, nothing covers the host machine dying.