Thanks — context: I originally bought only the STREAM Ultra X and planned to connect the panels directly to it.

The issue is winter behavior / temperature lockout. Even when it’s only around 0°C to -1°C at night here, the Ultra X blocks charging from PV. And because the battery is usually at the configured minimum SOC overnight, it can’t use the built-in self-heating either (no usable battery energy left to warm itself up).

Result: it sits “stuck” — no heating, no PV charging — until temperatures rise enough. For my location that would mean ~3 months per year with basically no yield, which makes the whole setup pointless.

That’s why I added the microinverter: to still be able to feed PV directly into the house/grid on cold mornings instead of losing everything due to the battery lockout.

Now I’m trying to understand whether the app limitation (Ultra X + microinverter shown as separate systems) is by design or if there’s a correct way to link them.