AgdaPkt 2015-03-23 Closed and Joint SA PFA

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8.A. - Page 109 Exhibit B. Engineering and Construction Requirements Acceptable mounting methods for unframed modules shall be provided by the manufacturer. Bolted and similar connections shall be non-corrosive and include locking devices designed to prevent twisting over the 25-year design life of the PV system. If PV modules using hazardous materials are to be provided, then the environmental impact of the hazardous material usage must be disclosed, including any special maintenance requirements and proper disposal/recycling of the modules at the end of their useful life. 3.5.4 Inverters In addition to the above, inverters proposed by Seller must comply with at least, but not limited to the following: • Inverters shall be suitable for grid interconnection and shall be compliant with all PG&E interconnection requirements. • Inverters shall comply with the State of California SB1 Guidelines for Eligibility, listed at: http://www.gosolarcalifornia.org/equipment/inverters.php • IEEE 929-2000—"Recommended Practice for Utility Interface of Photovoltaic Systems". • Inverters must automatically reset and resume normal operation after a power limiting operation. • The inverter shall be capable of continuous operation into a system with voltage variation of plus or minus 10%of nominal. The inverter shall operate in an ambient temperature range of -20°C to+50°C. • Inverters shall include all necessary self-protective features and self-diagnostic features to protect the inverter from damage (in the event of component failure or from parameters beyond normal operating range due to internal or external causes).The self- protective features shall not allow the inverters to be operated in a manner which may be unsafe or damaging. • Inverters shall be true sine wave high frequency PWM with galvanic isolation. • Inverters shall be sized to provide maximum power point tracking for voltage and current range expected from PV array for temperatures and solar insolation conditions expected for Project conditions. • Inverters shall be capable of adjusting to "sun splash" from all possible combinations of cloud fringe effects without interruption of electrical production. • Isolation transformers shall be provided for central inverters if the NEC or any other applicable safety standards require the use and application of such transformers. Use of transformer-less string inverters is acceptable. • Inverters shall be UL 1741 and IEEE 1547 compliant. • Inverters shall have a THD < 5%. • Enclosures shall be rated NEMA 3R when the inverter is located outdoors. For outdoor installations in corrosive environments, NEMA 4X series 300 stainless steel enclosures must be used. Exhibit B Page 9