Support Service-Hopewind

For Hopewind single‑phase inverters, the DC side can be sized at 1.1 to 1.2 times the rated power, while three‑phase inverters support up to 1.3 times or higher. To avoid unnecessary DC‑side clipping during certain periods, a typical design recommendation is 1.2 times the rated power. Additionally, the oversizing ratio should be adjusted according to the specific module specifications, such as 182 mm or 210 mm high‑power modules.

How many operation modes does the series PV inverter have?

(1) Standby mode:In this mode, the DC input switch is off and the external environment (e.g., insufficient irradiance) does not meet the inverter’s operating conditions. The inverter continuously performs self-checks and switches to operating mode as soon as operating conditions are satisfied.

(2) Operating mode:The inverter converts DC power from the PV strings into AC power and feeds it into the grid. If a fault is detected or a shutdown command is received, the inverter transitions to shutdown mode. If the PV input power falls below the grid‑connection threshold, it returns to standby mode.

(3) Shutdown mode:The inverter enters this state upon detection of a fault or a shutdown command during either standby or operation. Once the fault is cleared or a startup command is issued, the inverter reverts to standby mode.

Why does the screen not light up after the inverter is wired?

1.Use a multimeter to check whether the DC string voltage reaches the inverter’s start‑up voltage.

2.Verify that the DC polarity (positive and negative) is not reversed.

3.Ensure that the DC switch (if equipped) is in the "ON" position.

What’s the impact when AC output three-phase (L1, L2 and L3) cables of the inverter are reversed?

Hopewind inverters feature a three‑phase adaptive function, so incorrect phase sequence wiring does not cause any adverse effect.

Why should the shell of the series PV inverter be grounded (PE), and what are the requirements of the cable?

(1)Without grounding, the enclosure and any connected metal parts (e.g., brackets) may become live in the event of an insulation fault, posing an electric shock hazard. Grounding ensures both equipment safety and personal protection.

(2)For the protective earth (PE) connection, use a dedicated copper grounding cable with a cross‑section of no less than 16mm².

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