Photovoltaic energy storage power supply certification

Why is energy availability important in assessing PV systems?

Both energy and availability are necessary metrics for assessing PV systems. If the stakeholders involved in a contract are most interested in energy production, and if the contract holds parties responsible for energy production, then it is crucial that energy losses associated with unavailability and system performance are accounted for.

Where can I find a report on photovoltaic system performance?

IEC 61724-2 Photovoltaic system performance - Part 2: Capacity evaluation method IEC TS 61724-3 Photovoltaic system performance - Part 3: Energy evaluation method 138 This report is available at no cost from the National Renewable Energy Laboratory (NREL) at IEC 63019 Information Model for Availability (pending).

How are energy storage systems rated?

Energy storage systems are also rated by power delivery capacity in units of kilowatts. The power rating is important to determine the rate at which power can be delivered and will vary according to the application and relevant load profiles.

What is a PV system to be maintained?

The definition of the PV system to be maintained shall include PV modules, the support structure, disconnects, inverter(s), monitoring equipment, and all other appurtenances to make the PV system complete, grid-connected, and operational.” Example Description of Maintenance Services for Commercial Rooftop Installations

What are the requirements for a large PV power plant?

6.5.4 Compliance with Regulatory Requirements Large PV power plants (i.e., greater than 20 MW at the utility interconnection) that provide power into the bulk power system must comply with standards related to reliability and adequacy promulgated by authorities such as NERC and the Federal Energy Regulatory Commission (FERC).

Why should you track energy availability in a PV operation contract?

Tracking this availability (or unavailability) provides transparency into the equipment reliability state to all parties involved in an O&M services contract. In most PV operation contracts, energy will be the driving factor of whether the system is operating as expected.