How to validate PV plant performance at provisional acceptance phase?

To validate the PV plant performance at Provisional Acceptance phase, the PR test is conducted over a limited period and compared to the guaranteed PR, set based on simulations. The usual duration of PR tests is 7 to 15 days, depending on the contract.

How long should PV system performance baseline and model validation last?

After Initial Commissioning and a full year of system performance evaluation, PV system performance baseline and model validation will allow the system owner and maintenance providers to effectively evaluate system performance, at any time, for the life of the system. The duration of the secondary commissioning test should be one year.

Can a 600KW PV system perform well in late summer?

A plot of EPI is provided below from the 600kW PV system applying the above method. It shows a potential performance problem in late summer that could be investigated, such as soiling.

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.

Can a contractor recommend a PV system size?

After the contract award, the Contractor can recommend PV system sizes at their discretion, as long as the total aggregated PV system size is within plus/minus 10% of the original estimate. Certain buildings can be added or subtracted, subject to Governmental approval.

What irradiance should a PV system have?

Thermal issues are most visible when the PV system is operating at peak output. 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.