Carrollton 35 KW DC PVWatts Calculator.pdf
PDF 139 KB Posted
- Solicitation number
- RFP-785-1900000075-2
- Issued by
- Elliott County, Kentucky
About this file
This document is a PVWatts Calculator analysis report prepared for a 35 kW DC photovoltaic system proposed for Carrollton, Kentucky, in support of RFP-47-19, a Design/Build Photovoltaic Project. The analysis provides performance projections based on 30 years of historical weather data for the Carrollton location (latitude 38.69°N, longitude 85.18°W). The PV system specifications include a standard module type with fixed roof mount configuration, an array tilt of 12 degrees, array azimuth of 225 degrees, system losses of 14.08%, and an inverter efficiency of 96%, with a DC to AC size ratio of 1.2. The projected annual energy output is 41,807 kWh, with an expected range of 39,788 to 43,041 kWh per year, reflecting possible interannual variability in generation based on historical weather patterns.
The analysis indicates a capacity factor of 13.6% for the fixed open-rack PV system. Using an average retail electricity rate of $0.110 per kilowatt-hour, the projected annual economic value of the system's energy generation is $4,599. Monthly energy output varies throughout the year, with peak production occurring in July at 4,871 kWh and the lowest production in December at 1,889 kWh. The document includes disclaimers and indemnification language from the National Renewable Energy Laboratory (NREL), noting that PVWatts calculations include inherent assumptions and uncertainties and do not account for variations between PV technologies or site-specific characteristics beyond the inputs provided.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| Final_RFP_785_1900000075_2_SO_FORM.PDF | ||
| Request For Proposal.pdf | ||
| A6001 242 B3001 Floor Plan z-242.tif | TIF image | |
| Addendum No One.pdf | ||
| Carrollton Utility Site Plan.jpg | JPG image | |
| Carrollton Electric bill_KU.PDF | ||
| A6001 251 B3001 Elec FP z-251.tif | TIF image | |
| Carrolton Roof Warranty_1.pdf | ||
| Carrollton Roof Warranty_2.pdf | ||
| Carrollton Roof Warranty_3.pdf | ||
| Pre-Proposal Sign In Sheet.pdf | ||
| Final_RFP_785_1900000075_1_SO_FORM.PDF |
Show all 12
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Text version
5/15/2018 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.
41,808 kWh/Year*RESULTS
System output may range from 39,788 to 43,041 kWh per year near this location.
Month Solar Radiation ( kWh / m2 / day )
AC Energy ( kWh )
Value
January 2.32 2,012 221
February 3.25 2,555 281
March 4.07 3,453 380
April 5.16 4,010 441
May 5.88 4,542 500
June 6.49 4,746 522
July 6.44 4,871 536
August 6.03 4,538 499
September 5.23 3,867 425
October 3.86 3,073 338
November 2.79 2,251 248
December 2.16 1,889 208
Annual 4.47 41,807 $ 4,599
Location and Station Identification
Requested Location carrollton, ky
Weather Data Source Lat, Lon: 38.69, -85.18 0.6 mi
Latitude 38.69° N
Longitude 85.18° W
PV System Specifications (Commercial)
DC System Size 35 kW
Module Type Standard
Array Type Fixed (roof mount)
Array Tilt 12°
Array Azimuth 225°
System Losses 14.08%
Inverter Efficiency 96%
DC to AC Size Ratio 1.2
Economics
Average Retail Electricity Rate 0.110 $/kWh
Performance Metrics
Capacity Factor 13.6%
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