Photovoltaic inverter test questions

How to test a photovoltaic (PV) inverter?

To test a photovoltaic (PV) inverter, follow the procedure defined by the manufacturer. This may include arc-fault testing and verification of other protective functions. A loss of mains test must be performed: With the system operating, open the main AC disconnect – it should be observed (e.g. on a display meter) that the PV system immediately ceases to generate.

What is a solar Photovoltaic Certification Exam?

The document is a practice exam for solar photovoltaic certification that contains 70 multiple choice questions testing knowledge of PV system components, electrical calculations, safety procedures, and best practices.

How do you select an inverter for a PV system?

When designing a PV system, selecting the inverter is often the first consideration. This depends on the type of loads or electrical service and voltage, and the size and location of the PV array. The following standards apply to inverters used in PV systems, including requirements for product listing, installation, and interconnection to the grid.

How should a Photovoltaic (PV) system be tested?

Photovoltaic (PV) systems should only be tested by qualified personnel. Before conducting any testing, identify all safety hazards, mitigate the hazards, select the appropriate PPE, and ensure that all tools and meters are properly rated for the system voltage and current. Testing should include continuity of grounding and bonding as well as AC circuit voltage and phasing. Prior to conducting any testing, identify all safety hazards; mitigate the hazards; select the appropriate PPE; and ensure that all tools and meters are properly rated for the system voltage and current.

How do photovoltaic (PV) inverters work?

Photovoltaic (PV) inverters operate as diversionary charge controllers and convert excess solar energy from the PV array into usable AC power. They can dump excess energy to the grid when it is energized. When there is a loss of grid voltage, these inverters are usually designed to transfer loads from the grid to operate in stand-alone mode.

What is the maximum voltage of a PV system?

According to NABCEP, the maximum system voltage for a PV system is the PV array open-circuit voltage at the lowest expected ambient temperature at a site. Where other than crystalline silicon (thin-film) PV modules are used, manufacturer’s instructions must be used to calculate this value.