docs(faq): explain power-flow diagram showing 0W with split import/export sensors#4266
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springfall2008 merged 1 commit intoJul 17, 2026
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…port sensors grid_power expects a single signed sensor. Some meter/CT-clamp integrations instead expose two separate always-non-negative sensors (one for import, one for export) - if grid_power is pointed at just one of those, it correctly reads 0 during flow in the other direction, which looks like a bug but isn't. Documents the fix (a combining template sensor) alongside the existing "wrong direction" FAQ entry for the same diagram.
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Referenced from #4255 - a "power flow diagram shows 0W export" report that turned out to be a config/integration mismatch rather than a bug:
grid_powerexpects a single signed sensor, but the reporter's meter integration exposes two separate always-non-negative sensors (import and export), andgrid_powerwas only able to point at one of them.Adds a FAQ entry alongside the existing "grid power flowing in the wrong direction" one, covering this sibling case and the workaround (a Home Assistant template sensor netting the two into one signed value).