WHFRTC WF426 60KW AC PVWatts Calculator.pdf
PDF 173 KB Posted
- Solicitation number
- RFP 785 2500000086 2
- Issued by
- Meade County, Kentucky
About this file
This document is a PVWatts Calculator report provided by the National Renewable Energy Laboratory (NREL), a facility operated by the Alliance for Sustainable Energy for the U.S. Department of Energy. The report presents photovoltaic (PV) system performance predictions for a 60 kW AC system proposed at a location in Greenville, Kentucky (latitude 37.21°N, longitude 87.18°W). The analysis is based on 30 years of historical weather data and projects an annual energy output of 95,446 kWh, with a potential range of 92,382 to 100,219 kWh per year. The system specifications include a 70.2 kW DC capacity with a 1.2 DC-to-AC size ratio, fixed open rack array mounted at a 20-degree tilt facing south (180-degree azimuth), and 96 percent inverter efficiency. Monthly projections show varying energy generation throughout the year, with peak output occurring in June (10,352 kWh) and lower output in January (5,343 kWh).
The analysis indicates a DC capacity factor of 15.5 percent and assumes system losses of 14.08 percent. NREL cautions that PVWatts calculations include inherent assumptions and uncertainties that do not account for variations between PV technologies or site-specific characteristics beyond the inputs provided, and recommends more sophisticated modeling tools such as the System Advisor Model for complex assessments. The document includes a disclaimer stating that the Model is provided "as is" without warranties and that users assume all liability and indemnification obligations related to the Model's use.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| M1 - as-builts.pdf | ||
| Final_RFP_785_2500000086_2_SO_FORM.PDF | ||
| VSS - How to submit online response 01-24-24.pdf | ||
| E1 - as-builts.pdf | ||
| C1 - as-builts.pdf | ||
| A1 - as-builts.pdf | ||
| A3 - as-builts.pdf | ||
| Cover - as-builts.pdf | ||
| A2 - as-builts.pdf | ||
| Requst for Proposals.pdf | ||
| Addendum No. 1.pdf | ||
| Final_RFP_785_2500000086_1_SO_FORM.PDF | ||
| DB General Conditions.pdf |
Show all 13
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Text version
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 //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, and is intended to provide an indication of the possible interannual variability in generation for a Fixed (open rack) PV system at this location.
95,446 kWh/Year*RESULTS System output may range from 92,382 to 100,219 kWh per year near this location.
Month Solar Radiation ( kWh / m2 / day )
AC Energy ( kWh )
January 2.94 5,343
February 3.57 5,798
March 4.50 7,789
April 5.56 9,038
May 5.89 9,638
June 6.64 10,352
July 6.22 9,946
August 6.15 9,804
September 5.42 8,568
October 4.56 7,675
November 3.54 6,082
December 2.96 5,412
Annual 4.83 95,445
Location and Station Identification
Requested Location greenville, ky
Weather Data Source Lat, Lng: 37.21, -87.18 0.6 mi
Latitude 37.21° N
Longitude 87.18° W
PV System Specifications
DC System Size 70.2 kW
Module Type Standard
Array Type Fixed (open rack)
System Losses 14.08%
Array Tilt 20°
Array Azimuth 180°
DC to AC Size Ratio 1.2
Inverter Efficiency 96%
Ground Coverage Ratio 0.4
Albedo From weather file
Bifacial No (0)
Monthly Irradiance Loss
Jan Feb Mar Apr May June 0% 0% 0% 0% 0% 0%
July Aug Sept Oct Nov Dec 0% 0% 0% 0% 0% 0%
7/25/24, 8:25 AM PVWatts Calculator https://pvwatts.nrel.gov/pvwatts.php 1/2
Performance Metrics
DC Capacity Factor 15.5%
7/25/24, 8:25 AM PVWatts Calculator https://pvwatts.nrel.gov/pvwatts.php 2/2
File details come from the government source that posted it. Updated .