When charging EcoFlow DELTA Pro Ultra with 120V, it can output 240V normally. When charging EcoFlow DELTA Pro Ultra with 240V, it cannot output 240V.When charging at 240V using X-Stream charging via an AC inlet, AC output is not available. That is to say, when charging with high voltage 240V input voltage, all AC output is disabled.

15) How long is the EcoFlow DELTA Pro Ultra warranty?

EcoFlow DELTA Pro Ultra Inverter Warranty: 5 Years EcoFlow DELTA Pro Ultra Battery Warranty: 5 Years Even then, each LFP battery's lifespan lasts for as long as 10 years with up to 3500 cycles.

16) What is the EcoFlow DELTA Pro Ultra weather-protection level?

The EcoFlow DELTA Pro Ultra weather-protection level is IP54. An IP54 rating means that your product will be protected against dust and other particles and water spray from all directions.

17) What are EcoFlow DELTA Pro Ultra's solar charging priorities?

Charging priority: low voltage photovoltaic > high voltage photovoltaic > 5 + 8 interfaces (including Smart Home Panel 2) > mains

18) Can I connect EcoFlow power stations to my house electric panel directly?

Yes, but the transfer switch should be connected to the power station's AC output port. You should disconnect the circuits from the grid before the power station supports them. The total power consumption of the circuits should not exceed the output power rating. The output will not be grounded if the power station is not connected to the grid.

19) Does EcoFlow DELTA Pro Ultra work with an existing grid-tied system that does not have a backup feature?

Unfortunately, EcoFlow DELTA Pro Ultra cannot connect and feedback to the grid.

20) Can EcoFlow DELTA Pro Ultra be charged using an EcoFlow Smart Generator?

EcoFlow Smart Generator can charge EcoFlow DELTA Pro Ultra using an EcoFlow AC Charging Cable (NEMA 5-15P to C19). EcoFlow DELTA Pro Ultra can not be charged using DC through an XT150 cable. Third-party generators can charge EcoFlow DELTA Pro Ultra using the EcoFlow AC Generator Charging Adapter. The EcoFlow Smart Generator can be auto-switched on or off through the EcoFlow app.

21) Can the EcoFlow DELTA Pro Ultra charge using existing rooftop solar?

Yes, it's compatible with existing solar systems, including rooftop solar*. For each EcoFlow DELTA Pro Ultra Inverter, solar input can reach a maximum of 5600W (16.8kW with 3 inverters) with the following: High voltage PV: 80-450V, 15A, 4000W Max Low voltage PV:30-150V, 15A, 1600W Max *If you connect the EcoFlow DELTA Pro Ultra to PV system circuits installed on or in buildings, according to NEC regulations, the system shall include a rapid shutdown function to ensure operation safety and reduce shock hazards for emergency responders. If you wish to connect the EcoFlow DELTA Pro Ultra to PV system circuits, a pre-purchase consultation must be completed by a qualified electrician or installer.

22) Can the EcoFlow DELTA Pro Ultra connect to the EcoFlow Smart Home Panel?

No. You can purchase an EcoFlow Smart Home Panel 2 and an EcoFlow Double Voltage Hub - Power Input/Output (DELTA Pro) (connects 2 x EcoFlow DELTA Pro to EcoFlow Smart Home Panel 2) to replace the original EcoFlow Smart Home Panel and connect 2 x EcoFlow DELTA Pro Ultra and 2 x EcoFlow DELTA Pro at the same time to achieve an 21.6kW output.