Confirmed against Sungrow's own docs and live-tested against a real
battery plant: SOC and charge/discharge power live at the *device*
level (getDeviceRealTimeData against the hybrid inverter's ps_key,
device_type 14), not in the plant-aggregate points used elsewhere in
this client -- querying them via the plant-level endpoint just returns
null. Battery status is fetched once per live "today" poll (not
backfilled historically) and stored in three new nullable columns,
self-migrated on startup since there's no Alembic here.
Also fixes the dashboard's self-consumption line to derive from
load - import rather than generation - export, which overstated
"solar -> house" for battery systems (a chunk of that gap was going
into charging, not the house). The live flow diagram now shows a
Battery node (SOC + charge/discharge) that stays hidden entirely for
solar-only plants like Kallangur.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
FastAPI app that pulls interval usage from Sungrow iSolarCloud (OAuth2),
caches AER Consumer Data Right electricity plan data, and compares actual
metered usage against every available plan to estimate real annual cost
(TOU, tiered feed-in, and flat tariffs).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
