35.1KW DC PVWatts Calculator Harrodsburg.pdf
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- Solicitation number
- RFP 785 2100000008 3
- Issued by
- Marion County, Kentucky
About this file
This is a PVWatts Calculator analysis report from the National Renewable Energy Laboratory (NREL) for a proposed photovoltaic (PV) system installation in Harrodsburg, Kentucky. The document presents performance projections for a 35.1 kilowatt (kW) direct current (DC) commercial-grade solar photovoltaic system using fixed roof-mount array configuration. The system is designed with an array tilt of 4.76 degrees, azimuth orientation of 135 degrees, and includes an inverter efficiency rating of 96 percent with a DC to AC size ratio of 1.17. The analysis is based on 30 years of historical weather data for the Harrodsburg location (latitude 37.77°N, longitude 84.86°W) and provides monthly and annual energy output projections with associated economic valuations.
The PVWatts analysis projects annual energy output of 42,754 kilowatt-hours per year, with a possible interannual variability range of 40,432 to 44,558 kWh annually, reflecting a capacity factor of 13.9 percent. Monthly output ranges from a low of 1,780 kWh in December to a peak of 5,169 kWh in June. Using an average retail electricity rate of $0.10 per kilowatt-hour, the projected annual system value is $4,275. The system accounts for 14.08 percent in total system losses. The report includes standard NREL disclaimers regarding model limitations, assumptions about PV technology variations, and indemnification language, noting that more sophisticated modeling tools are available for complex site-specific analysis.
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3/26/2019 PVWatts Calculator https://pvwatts.nrel.gov/pvwatts.php 1/1
Caution: Photovoltaic system performance predictions calculated by PVWatts® include many inherent assumptions and uncertainties and do not reflect variations between PV technologies nor site-specific characteristics except as represented by PVWatts® inputs. For example, PV modules with better performance are not differentiated within PVWatts® from lesser performing modules. Both NREL and private companies provide more sophisticated PV modeling tools (such as the System Advisor Model at https://sam.nrel.gov) that allow for more precise and complex modeling of PV systems.
The expected range is based on 30 years of actual weather data at the given location and is intended to provide an indication of the variation you might see. For more information, please refer to this NREL report:
The Error Report.
Disclaimer: The PVWatts® Model ("Model") is provided by the National Renewable Energy Laboratory ("NREL"), which is operated by the Alliance for Sustainable Energy, LLC ("Alliance") for the U.S.
Department Of Energy ("DOE") and may be used for any purpose whatsoever.
The names DOE/NREL/ALLIANCE shall not be used in any representation, advertising, publicity or other manner whatsoever to endorse or promote any entity that adopts or uses the Model. DOE/NREL/ALLIANCE shall not provide any support, consulting, training or assistance of any kind with regard to the use of the Model or any updates, revisions or new versions of the Model.
YOU AGREE TO INDEMNIFY
DOE/NREL/ALLIANCE, AND ITS AFFILIATES,
OFFICERS, AGENTS, AND EMPLOYEES
AGAINST ANY CLAIM OR DEMAND,
INCLUDING REASONABLE ATTORNEYS'
FEES, RELATED TO YOUR USE, RELIANCE,
OR ADOPTION OF THE MODEL FOR ANY
PURPOSE WHATSOEVER. THE MODEL IS
PROVIDED BY DOE/NREL/ALLIANCE "AS IS"
AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING BUT NOT
LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE EXPRESSLY
DISCLAIMED. IN NO EVENT SHALL
DOE/NREL/ALLIANCE BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER,
INCLUDING BUT NOT LIMITED TO CLAIMS
ASSOCIATED WITH THE LOSS OF DATA OR
PROFITS, WHICH MAY RESULT FROM ANY
ACTION IN CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS CLAIM THAT ARISES OUT
OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THE MODEL.
The energy output range is based on analysis of 30 years of historical weather data for nearby , and is intended to provide an indication of the possible interannual variability in generation for a Fixed (open rack) PV system at this location.
42,754 kWh/Year*RESULTS
System output may range from 40,432 to 44,558 kWh per year near this location.
Month Solar Radiation ( kWh / m2 / day )
AC Energy ( kWh )
Value
January 2.27 2,015 202
February 2.93 2,321 232
March 4.06 3,462 346
April 5.24 4,230 423
May 6.07 4,823 482
June 6.76 5,169 517
July 6.38 4,992 499
August 6.11 4,758 476
September 5.07 3,818 382
October 3.83 3,124 312
November 2.73 2,262 226
December 2.02 1,780 178
Annual 4.46 42,754 $ 4,275
Location and Station Identification
Requested Location Harrodsburg, KY
Weather Data Source Lat, Lon: 37.77, -84.86 1.1 mi
Latitude 37.77° N
Longitude 84.86° W
PV System Specifications (Commercial)
DC System Size 35.1 kW
Module Type Standard
Array Type Fixed (roof mount)
Array Tilt 4.76°
Array Azimuth 135°
System Losses 14.08%
Inverter Efficiency 96%
DC to AC Size Ratio 1.17
Economics
Average Retail Electricity Rate 0.100 $/kWh
Performance Metrics
Capacity Factor 13.9%
File details come from the government source that posted it. Updated .