Frequently Asked Questions about Deye Inverter

1. What does MPPT mean?

Maximum Power Point tracking (MPPT). Photovoltaic cells are affected by factors such as ambient temperature and light intensity, and their output power will change accordingly. Photovoltaic inverters with MPPT maximum power tracking are designed to make full use of solar cells and track the highest voltage and current values of solar panels in real time, so that they can operate at the maximum power point to maximize the effectiveness of the solar panels.

2. What is island protection?

When the inverter is connected to the grid, the ATS port will output 230Vac, which is used to cut off the power supply to the ground neutral point (load port N line) and forward through the external connection connection. When the inverter is disconnected from the grid, the ATS port voltage is 0 and grounded. The neutral point connection remains unchanged.

3. What are the methods to prevent backflow in single-phase strings?

The single-phase grid-connected inverter has its own anti-backflow function and only needs to be connected to an external CT.

4. How to modify the self-test time

Enter the running parameter setting interface and adjust the value behind self-check.

5. How to restore factory settings

Enter the system parameter setting interface and set factory data reset.

6. The inverter reports that the grid voltage frequency is too high/too low/no grid fault

The grid voltage/frequency exceeds the grid voltage/frequency value allowed by the inverter settings; modify the grid voltage/frequency range.

7. The inverter has no output power

Check whether the meter/limier function is turned on. Check the active % setting value; when the PV voltage and grid voltage are normal, check whether the anti-reverse flow function and active power output percentage of the machine are turned on.

8. There is a squeaking sound inside the single-phase machine.

The AC side inductor is bad or resonant; first check the software version and make sure to upgrade to an anti-resonance version. If it still doesn't work, the inductor is not installed properly or the sum inductance is not enough.

9. What are the common reasons that affect the power generation of grid-connected inverter?

a.Dust b.Shadow c.Attenuation d.String mismatch e.Line loss

10. How to determine whether PV modules can be connected to the inverter

Single modules only need to check whether the MPP current and short-circuit current exceed the maximum short-circuit current of the inverter.

11. How to adjust the output power of the grid-connected inverter

Enter the operating parameter setting interface and adjust the output active power by adjusting ativeP%. The above are common problems and solutions for Deye string inverters. If you cannot solve the abnormality of your inverter, please contact the relevant staff of Deye for help in time.