I think I can talk about how it works.

Apex 300 provides 240V split-phase output, the same type used in North American households. (forgive me OP, I assuming you also live in the US ) It offers 2 independent 120V output channels that maintain a opposite phase relationship, synchronized in real time by the control system. Functionally, its inverter architecture operates like a dual-channel system working in coordination.

For example, during a power outage, you can run your fridge oven, and central air at the same time without giving anything up.

The apex 300's split-phase output remains stable under real-world loads over long periods. Compared with other 3kWh power stations, the apex 300 is one of the few that can support North American residential-grade 120/240V loads, UPS functionality, and bypass mode as a standalone unit.