Photovoltaic Supply System

1. PV inverter system to include full protective systems to protect utility line personnel from back-feed onto the utility grid system upon utility power failure.

2. All wiring to be in accordance with the 1996 National Electrical Code, Article 690, Solar Photovoltaic Systems. Particular attention shall be given to Article 690 G. Connection to Other Sources and Article 690-64. Point of Connection.

3. The inverter A-C outlet supply shall be wired to an outside fusible disconnect, labeled “PV Powers Supply,” second line “Danger, Open When Working on Utility Supply Line,” installed adjacent to the utility meter and disconnect switch.

4. The owner shall be responsible for the installation of the PV System and the PV installation must be inspected by the State electrical inspector prior to energizing system.

5. The City reserves the right to conduct power quality surveys (harmonic recordings) of the PV A-C power system during the operating life of this PV system upon providing appropriate notification to the owner.

6. The City is serving notice that grid-tied PV systems and all alternative power supply systems shall meet NESC safety and protection requirements and utility grade power quality standards for voltage and frequency. For small PV supply systems, harmonic content injection shall be limited to the levels prescribed in IEEE 519-1992.

7. For this PV installation, the City will monitor harmonic levels for educational and informational purposes but will not reject City grid-connection at this installation site if this installation does not conform to IEEE-519 harmonic limits (i.e. current harmonic standards). The City will work closely on this power quality issue for this PV site. If power quality deteriorates to unacceptable levels at this PV site, the City reserves the right to disconnect the PV system from the City utility grid.

8. A 1-line electrical diagram of the PV system shall be furnished to the City prior to installation. The 1-line electrical diagram shall show all wiring, connecting point, and protective devices for the selected PV equipment components at this site.

9. The City shall furnish and install a single-phase, 120/240V, 60HZ, meter capable of reverse power flow measurement. This meter shall be capable of subtracting KWhr flowing out to the City utility grid system from the Kwhrs supplied from the utility grid, resulting in net KWhr readings delivered to the residence for billing by the City. The City will not reimburse the owner/residence for any surplus Kwhrs delivered to the City at this site should this installation result in net KWhr delivery to the City utility grid system. A standard single-phase meter, with no detent, will record reverse energy flow and can be used to record bidirectional KWhr use at this PV site.