Photovoltaic inverter test table

How do you test a PV inverter?

To test a PV inverter according to IEC 62093, identify a suite of accelerated tests to identify potential reliability weaknesses. Develop recommendations for how the tests are to be performed, including sample size, environmental test conditions, duration, power and monitor, etc. Provide a baseline for comparison of reliability performance between PV inverter manufacturers.

Do you need an electrician to test a PV inverter?

Warning: Carrying out these tests involves working with live DC and AC voltages. The testing must only be carried out by an ACT licensed electrician. For inverters with PV panels connected, the tests must be conducted at a time of day when weather conditions allow the PV system to be producing a minimum power output.

What is a good test voltage for a PV module?

For example, consider a single-ended test of a PV string with Voc of 475V and a PV module maximum system voltage spec of 1000V. Setting the meg tester’s test voltage to 500V will keep all points in the circuit below 1000V.

What are the different types of PV inverters?

IEC 62093 outlines four categories of PV inverters: \n• Category 1: Inverter and DC-DC converters < 700W AC \n• Category 2: Wall mounted assemblies, such as string inverters and small 3-phase inverters \n• Category 3: Free-standing single bay assemblies up to 100 kW AC \n• Category 4: Free-standing multi-bay assemblies over 100 kW AC

How do you test a MPPT inverter?

Make sure to test the inverters according to the industry standards, such as EN50530, which provides a procedure for measuring the efficiency of MPPT. Use an AC / grid emulator to load and test the inverter’s output.

What irradiance should a PV module have?

The irradiance in the plane of the array should be at least 600W/m2. To allow meaningful comparison of images of different devices, the irradiance and inverter operating point should be stable. A clear sky also eliminates thermal reflections from clouds, which can be a problem when imaging the front surfaces of PV modules, discussed below.