Pre-release. A stale-forecast fix for Helios-Forecast users, and a new independent unit for energy totals. Supersedes 2026.9.2-a5.
Fixed: switching to Yesterday could still show a narrower forecast window (#406)
With a Helios-Forecast source configured, switching to a period reaching further into the past than the one already loaded, most commonly the Yesterday tab, could keep showing the forecast fetched for the narrower period for up to five minutes: the fetch was throttled purely by elapsed time, not by whether the cached data actually covered the newly needed window. The card now re-fetches immediately whenever the requested past window grows. Home Assistant's built-in solar forecast (Forecast.Solar, Solcast, ...) is unaffected either way: that API never returns past days, so it still cannot show a forecast for a day already gone. Thanks to @FoxP.
Added: a separate unit for energy totals (#407)
power-unit (W / kW) used to set the energy totals' unit too, kW pairing with kWh and W with Wh, with no way to pick one independently of the other. A new energy-unit option (Wh / kWh / Auto, the visual editor's "Energy unit") lets you set the day curve, the detail panel and the timeline's day totals on their own, for example precise W chips alongside kWh totals. Auto (the default) keeps today's behaviour, so an existing card reads exactly the same until you pick a unit here. Thanks to @zigomatichub.
How to test
Update to 2026.9.2-b0 (HACS pre-release) and check that the card really shows b0 in HACS: a browser reload alone does not update the installed version.
- If you run Helios-Forecast: switch to the Yesterday tab shortly after loading the card and check the forecast curve is there.
- Try the new Energy unit option in the card's Data display settings (
auto/Wh/kWh), independently of Power unit.