Sungrow's OAuth server keeps only one active token session per (app,
account), not per plant -- with Kallangur and McDowall each managing their
own independent token against the same account, whichever one refreshed
last was silently invalidating the other's refresh token. Both instances
now share one token file (a common bind-mounted volume) instead of each
holding their own.
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>
