Beta - for accounts the default gateway rejects (code 805 right after signing in; European accounts in particular, bluetti-official#172).
The sign-in flow now finds the data center that serves the account: it asks gw.bluettipower.com for your devices and, if that one rejects the fresh token, gwde.bluettipower.com (Europe) then gwpry.bluettipower.com (US). The answering one is recorded in the config entry and used for every cloud request from then on. Nothing to edit, no region to pick. Accounts the default serves see no change.
To test: HACS → BLUETTI (community) → ⋮ → Redownload → switch on Show beta versions → 1.5.0.b1 → restart → sign in again (Settings → Devices & services → BLUETTI → ⋮ → Reconfigure, or remove and re-add): the probe runs at sign-in, and an entry created before this beta keeps the default until then. Then: do values refresh, and does a debug log show Cloud gateway: eu (https://gwde.bluettipower.com) at setup? Report on the tracking issue.
Everyone else: stay on 1.4.4.