San Diego Community Power Board of Directors
June 23, 2022

Public Discussion—SDCP BOD
May 26, 2022
• Hypothetical Hybrid 90/360 Solar Array Topology Comparison Dave Peterson
Retired Engineer
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Jacumba 89MW/400 MWh CdTe, No Tracking, 42° Slope, BOL PVGIS Tool Daily Average (Blue) and Average Minus Variability (Red), MWh • Land use of less that 0.5 square miles
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Daily PV GWh -2015 CAISO Renewables Watch
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Jacumba 114 MW/400MWh Crystalline Silicon, Daily Tracking, 0° Slope, BOL Daily Average (Blue) and Average Minus Variability (Red), MWh PVGIS • Extra “free” over-generated electricity competes with the electricity being produced by solar-only farms and home rooftops
Summary of Makeup Electricity CO2 Emission Weight for 4 Cases 5/26/2022
5 Renewable Source
Natural Gas Plant
Makeup Electricity
Emission
(mtCO2/10 years)
Car
Equivalent
@ 2 tons per
Car
Hypothetical 50 MW Wind Farm Using 2014 MISO Wind Profile with 30 MW Truncation to increase Capacity Factor (see April 28 comments) 540,000 270,000 Topology 1, Hypothetical Non Tracking Jacumba 90/360 Farm Using CAISO 2015 PV data to calculate winter CO2 emission 26,280 13,140 Topology 1, Use of overgenerated electricity during the day, Using Natural gas generation for nighttime 1,167,782 583,891
Topology 2 (Page 4) , Hypothetical Tracking 104 MW Jacumba Hybrid 90/360 Farm using 2015 CAISO PV data, winter makeup 26,280 13,140 Topology 2, Use of overgenerated electricity during the day, Using Natural gas generation for nighttime 2,210,769 1,105,385