Energy Production Data for As-Available Products

Energy Production Data for As-Available Products Addendum I to Offer Form

For Participants submitting Offers to supply PG&E with an As-Available product, PG&E requests an additional set of data for the Offer. The attached document, Energy Production Data for As-Available Products (Addendum I to the Offer Form), specifies the specific additional data that the Participant will need to submit to PG&E to substantiate its energy production estimates, profiles, and project viability. These additional data requests are specified by generation technology for the As-Available generation technologies - wind, photovoltaic, and solar thermal.

Please submit the completed Energy Production Data for As-Available Products no later than Wednesday, August 25th @ 5 PM (two days after the rest of the Offer is due to PG&E). As with the other submittals for the Offer, the Participant needs to send this submittal to PG&E in both hard copy and electronic form.

Please deliver two (2) hard copies via hand-delivery or overnight courier to:

RPS Solicitation Power Contracts Department Attention: Dave Landes Room 1245 B, Mail Code N12E Pacific Gas and Electric Company 245 Market Street San Francisco CA 94105 Tel: (415) 973-9326

The electronic documents should be sent to the following email address:

[email protected]

PG&E: RFO Offer, Addendum I; 8/10/2004 Page 1 of 6 Energy Production Data for As-Available Products Addendum I to Offer Form

I. PHOTOVOLTAIC

Project Information  Project description including site layout drawings, system drawings, figures, photographs, etc.  Project STC and PTC condition ratings, DC rated output, and AC rated output

Equipment Characteristics  Photovoltaic Modules  Manufacturer, model number and module description (semi-conducting material, crystalline, thin-film, etc.)  Module characteristics (typical I-V curves at different temperatures and different radiation levels)  Array parameters and rating (number of modules in series and parallel per array, array short-circuit current, open-circuit voltage, peak current and voltage, etc)  System life/degradation with supporting information from manufacturer warranty and performance guarantees  Tracking Mechanism/Support Structure  Fixed tilt or single or dual axis tracking  Tracking axis (east-west, north-south, etc.), if applicable  Array slope  Array azimuth  Inverter, Electrical and Structural Issues  Inverter manufacturer, model number, continuous power rating and efficiency curve  Inverter reliability information (number of similar units installed, mean time before first failure, mean time between failures, etc.)  Max power point tracker device  Structural support information (module layout drawing, trusses, roof support, roof penetration, etc)  Electrical information (one-line diagram, grid-connect diagram, disconnect switch, fuses, etc)

Solar Insolation Data  Insolation Data (hourly radiation, temperature, location and elevation)  Date and time of insolation data acquisition  Comparison of insolation data to reference Typical Meteorological Year (TMY) data  Independent engineer assessment of the applicability of the measured solar insolation data to the proposed site if the data was not taken at the project site

Project Performance  Project net output (kW) versus solar insolation curve  Historic (if applicable) and forecast equivalent availability factor  Historic (if applicable) and forecast equivalent forced outage rate  Historic (if applicable) and forecast planned outage factor  Quantification and justification for array derating factors/losses including STC to PTC, module mismatch, soiling, wiring, isolation transformer, inverter, orientation, shading, and availability

Site/Host Issues  Land requirement  Description of control of land where the project is to be sited/hosted  If site is not under direct control of the project, describe the relationship to the host and the commitment of the host to provide necessary infrastructure (including maintenance, if applicable) throughout the duration of the power sales agreement  For building integrated systems, describe the structure to which the system will be attached and any projected underlying maintenance that may affect the project over the agreement duration (e.g., roof replacement and repair)

II. SOLAR THERMAL

Project Information  Technology (parabolic trough, power tower, parabolic dish, etc.)  System descriptions, conceptual drawings, figures, and photographs for the collectors, receivers, tower (if applicable), collector/receiver/engine system (if applicable)  Design point (specify time)  System Solar Multiple (design point thermal power from collector/receiver divided by design point thermal power to power generation—zero storage system would have a SM of 1.0)  Heat Transfer Fluid Type and Operating Temperatures (if applicable)  Overall Land Requirements  Supplemental fuel  Type (e.g., natural gas)  Delivery mechanism and status of procurement  Contract type (firm, non-firm, etc.)  Projected hourly consumption (MBtu/hr)  Percent of heat input (maximum instantaneous, annual average)

Equipment Characteristics  Collector/receiver characteristics  Type, manufacturer if available  Collector (mirror) area  Commercial status (operational history, hours, number and size of systems, etc.)  Steam generator characteristics  Type, Manufacturer if available  Steam (or other turbine working fluid) temperature and pressure  Commercial status (operational history, hours, number and size of systems, etc.)  Turbine (or Engine) generator characteristics  Type, Manufacturer if available  Temperatures/Pressures  Backpressure  Commercial status (operational history, hours, number and size of systems, etc.)  Cooling system (if applicable)  Type, manufacturer if available  Water usage  Storage System Characteristics (if applicable)  Configuration  Capacity (energy/hours at peak operation)  Temperatures  Commercial Status (Operational history, hours, number and size of systems, etc.)

Solar Radiation and Atmospheric Data  Solar direct normal radiation data (hourly radiation, temperature, location, and elevation)  Date and time of radiation data acquisition  Data source and description of the equipment and method used to acquire the solar radiation data  Solar radiation model used to develop design  Description of the solar radiation model methodology

Project Site Atmospheric Information  Project site altitude  Average atmospheric pressure  Hourly average dry bulb and wet bulb temperature for each month of the year

Water Resources  If required, cooling water location, and relationship to project site  Quantity and quality of water available to the project  Quantity of cooling water required  Control of the water source (e.g. ownership of water rights, lease, lease options)  Water supplier (if applicable) and contractual arrangement  Wastewater discharge quantity, quality, and method

Project Performance  Historic (if applicable) and forecast equivalent availability factor  Historic (if applicable) and forecast equivalent forced outage rate  Historic (if applicable) and forecast planned outage factor  Capacity/Efficiency Stair-step  Incident Direct Normal Insolation times collector area  Power/energy delivered to receiver  Power/energy delivered to heat transfer fluid  Power/energy delivered to steam (or other working fluid)  Estimated air emissions for NOx, SOx, CO, CO2, PM10, VOC.  Efficiency/Capacity Degradation Estimates

III. WIND

Site Wind Data  Raw hourly or ten-minute wind speed and direction data  Description of equipment used to record data  Available calibration certificates for equipment  Conversion factors (e.g. m/s per Hz) applied in recording wind speeds  Maintenance records for monitoring work  Location, height and orientation relative to mast of all sensors

Referenced Wind Data  Hourly or ten-minute wind speed and direction data  Description of equipment used to record data  Available calibration certificates for equipment  Maintenance records for monitoring work  Location, height and orientation relative to mast of all sensors

Wind Turbine Information  Turbine make and model  Turbine rotor diameter  Turbine hub height  Turbine power curve

Wind Farm Information  Layout of wind farm as coordinates  Detailed topographic maps of project area with all mast and turbine locations

Wind Data Quality Checking and Analysis  Details of instrument configurations and measurement periods for each site mast and reference station  Summary of mast maintenance records and explanations for significant periods of missing data  Data recover rates and measured monthly means for mast employed in the assessment

Prediction of Long-Term Wind Regime at Mast Locations  Description of methodology employed to adjust measured wind speeds on site to the long-term  Correlation plots and coefficients for relevant correlations in the assessments  Predicted long-term mean wind speeds at measurement heights and hub height at all masts employed in the assessment  Annual wind speed and direction frequency distribution for long-term site masts  Plot of annual wind rose for long-term site masts  Description of methodology employed to extrapolate mean wind speeds at measurement height to hub height

Prediction of Site Wind Speed Variations  Description of methodology employed to predict wind speed variations across the site  Details of wind flow modeling employed and any inputs to the model (where applicable)

Energy Production Estimate  Predicted hub height mean wind speed and energy production at all turbine locations  Predicted long-term site air density  Turbine power curve employed and description of any adjustments made to the power curve  Description of methodology employed to calculate energy losses due to array effects  Clear breakdown of applied energy loss factors  Historic (if applicable) and forecast equivalent availability factor  Historic (if applicable) and forecast equivalent forced outage rate  Historic (if applicable) and forecast planned outage factor

Uncertainty Analysis  Analysis of uncertainty associated with the predictions provided in the assessment

PG&E: RFO Offer, Addendum I; 8/10/2004 Page 6 of 6