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FAQs
Common Error Codes & SolutionsInverter Operation & Maintenance GuidelinesAdjusting Grid-Connection Voltage ParametersWiring Errors, Missing Ground Wire & Improper Lightning ProtectionInsulation Fault ("PV Isolation Low")The Inverter LCD Screen Shows NothingGrid Voltage Out of Range (AC V Outrange)PV System Not Reaching Ideal Output PowerDC Overvoltage AlarmOver-temperature ("Overtemperature" shown on the LCD)NOAH 2000 Balcony Solar Storage FAQ
FAQs

PV System Not Reaching Ideal Output Power

The factors that can keep a PV system from reaching its ideal output power, and the checks to perform before connection.

Possible Causes

Many factors affect the output power of a PV system, including the amount of solar radiation, the tilt angle of the solar modules, dust and shadow obstruction, and the temperature characteristics of the modules. Improper system configuration and installation can also result in low system power.

Solution

Check the following before connection:

  1. Test whether the power of each module is sufficient.

  2. Check whether the modules have any shadow or dust.

  3. Test whether the voltage after the modules are connected in series is within the voltage range; if the voltage is too low, the system efficiency will decrease.

  4. Before installing multiple strings, first check the open-circuit voltage of each string — the difference should not exceed 5 V. If the voltage is found to be incorrect, check the wiring and the connectors.

Need help?

If the output power is still lower than expected after these checks, contact us.

Grid Voltage Out of Range (AC V Outrange)

Why the inverter shows "AC V Outrange" when the mains voltage exceeds its grid-connection voltage range, and how to fix it.

DC Overvoltage Alarm

Why a DC overvoltage alarm occurs and the recommended PV string voltage ranges for single-phase and three-phase string inverters.

Table of Contents

Possible Causes
Solution