Research Output per Year
Research Output per Year
- 1 - 50 out of 80 Results
Search results
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2025
Digitize O&M Procedure Guidelines for Illu Workflows: Cooperative Research and Development Final Report, CRADA Number CRD-22-23180
Walker, A., 2025, 11 p.Research output: NREL › Technical Report
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Growing Panes: Investigating the PV Technology Trends Behind Frequent Early Failures in Modern Glass-Glass Modules
Palmiotti, E., Springer, M., Zuboy, J., Silverman, T., Braid, J., Jordan, D., Rabade, S., Walker, A. & Barnes, T., 2025, 41 p.Research output: NREL › Presentation
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2024
Ambient Energy for Buildings: Beyond Energy Efficiency: Article No. 100076
Adua, L., Asamoah, A., Barrow, J., Brookstein, P., Chen, B., Coleman, D., Denzer, A., Desjarlais, A., Falconer, W., Fernandes, L., Fisler, D., Foley, C., Gaillard, C., Gladen, A., Goswami, Y., Guzowski, M., Hamilton, B., Hill, T., Hun, D. & Kar, B. & 22 others, , 2024, In: Solar Compass. 11, 24 p.Research output: Contribution to journal › Article › peer-review
4 Scopus Citations -
Impacts of PV Module Connector Failures on Cost and Performance of Utility Scale Photovoltaic Systems
Walker, A., Ramasamy, V. & Desai, J., 2024, National Renewable Energy Laboratory (NREL).Research output: NREL › Poster
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Optimize Topology, Component Sizes, and Operating Strategy of Participant's Protype: Cooperative Research and Development Final Report, CRADA Number CRD-20-17104
Walker, A., 2024, 21 p.Research output: NREL › Technical Report
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Rapid Characterization and Statistical Analysis of High-Volume Field-Harvested Photovoltaic Connectors
DiGregorio, S., Lolla, T., Li, W., Ramasamy, V., Walker, A., Desai, J., Burnham, L. & King, B., 2024, p. 1249-1252. 4 p.Research output: Contribution to conference › Paper
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Testing of Participant's Power Electronics Component for Circuit Performance and Efficiency: Cooperative Research and Development Final Report, CRADA Number CRD-19-16343
Walker, A., 2024, 14 p.Research output: NREL › Technical Report
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2023
Battery Energy Storage System Evaluation Method: U.S. Department of Energy (DOE), Federal Energy Management Program (FEMP)
Walker, A. & Desai, J., 2023, 25 p.Research output: NREL › Technical Report
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Considerations in Development of a Roadmap Toward Resilient and Net-Zero Energy Supply
Walker, A., 2023, 14 p.Research output: NREL › Presentation
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Operation and Maintenance of PV Systems: Data Science, Analysis, and Standards
Walker, A., Desai, J., Gunda, T. & Jackson, N., 2023, 11 p.Research output: NREL › Technical Report
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Reliability, Cost and Performance Risks of PV Connector Failures
Walker, A. & Desai, J., 2023, 19 p.Research output: NREL › Presentation
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U.S. Solar Photovoltaic System and Energy Storage Cost Benchmarks, With Minimum Sustainable Price Analysis: Q1 2023
Ramasamy, V., Zuboy, J., Woodhouse, M., O'Shaughnessy, E., Feldman, D., Desai, J., Walker, A., Margolis, R. & Basore, P., 2023, 52 p.Research output: NREL › Technical Report
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2022
Cybersecurity Standards for Photovoltaic Operations
Walker, A. & Benton, D., 2022, 13 p.Research output: NREL › Presentation
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Distribution Function Instead of Steady-State Assumption in Time-Series Simulation
Walker, A. & Desai, J., 2022Research output: NREL › Poster
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REopt: Energy Decision Analysis
Elgqvist, E., Olis, D., Laws, N., Krah, K., Becker, B., Ericson, S., Parkhill, L., Dunham, H., Farthing, A., Manogaran, I., Gagne, D., Eger, R., Muerdter, N., Blakley, H. & Walker, A., 2022, 53 p.Research output: NREL › Presentation
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2021
Best Practices at the End of Photovoltaic System Performance Period
Walker, A., Curtis, T., Heath, G., Desai, J., Settle, E. & Barbosa, C., 2021, 32 p.Research output: NREL › Technical Report
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Cybersecurity in Photovoltaic Plant Operations
Walker, A., Desai, J., Saleem, D. & Gunda, T., 2021, 22 p.Research output: NREL › Technical Report
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Masking of Photovoltaic System Performance Problems by Inverter Clipping and Other Design and Operational Practices
Walker, A., Balfour, J., Hill, R., Robinson, G., Gunda, T. & Desai, J., Jul 2021, In: Renewable and Sustainable Energy Reviews. 145, 8 p., 111067.Research output: Contribution to journal › Article › peer-review
Open Access9 Scopus Citations -
Performance Index Assessment for the PV Fleet Performance Data Initiative
Deline, C., Anderson, K., Jordan, D., Walker, A., Desai, J., Perry, K., Muller, M., Marion, B. & White, R., 20 Jun 2021, p. 1486-1491. 6 p.Research output: Contribution to conference › Paper › peer-review
7 Scopus Citations -
PV Fleet Performance Data Initiative: Performance Index-Based Analysis
Deline, C., Anderson, K., Jordan, D., Walker, A., Desai, J., Perry, K., Muller, M., Marion, B. & White, R., 2021, 25 p.Research output: NREL › Technical Report
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REopt Lite User Manual
Anderson, K., Olis, D., Becker, B., Parkhill, L., Laws, N., Li, X., Mishra, S., Kwasnik, T., Jeffery, A., Elgqvist, E., Krah, K., Cutler, D., Zolan, A., Muerdter, N., Eger, R., Walker, A., Hampel, C. & Tomberlin, G., 2021, 118 p.Research output: NREL › Technical Report
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Understanding Solar Photovoltaic System Performance: An Assessment of 75 Federal Photovoltaic Systems: U.S. Department of Energy (DOE), Energy Efficiency & Renewable Energy (EERE)
Walker, A. & Desai, J., 2021, 36 p.Research output: NREL › Technical Report
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2020
A Machine Learning Evaluation of Maintenance Records for Common Failure Modes in PV Inverters
Gunda, T., Hackett, S., Kraus, L., Downs, C., Jones, R., McNalley, C., Bolen, M. & Walker, A., 2020, In: IEEE Access. 8, p. 211610-211620 11 p., 9272625.Research output: Contribution to journal › Article › peer-review
Open Access32 Scopus Citations -
Insurance in the Operation of Photovoltaic Plants
Schwab, A., Walker, A. & Desai, J., 2020, 42 p.Research output: NREL › Technical Report
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Life-Cycle Cost and Optimization of PV Systems Based on Power Duration Curve with Variable Performance Ratio and Availability
Walker, H., Desai, J. & Qusaibaty, A., 2020, 32 p.Research output: NREL › Technical Report
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Model of Operation-and-Maintenance Costs for Photovoltaic Systems
Walker, A., Lockhart, E., Desai, J., Ardani, K., Klise, G., Lavrova, O., Tansy, T., Deot, J., Fox, B. & Pochiraju, A., 2020, 34 p.Research output: NREL › Technical Report
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Moving the Mission Forward with Renewable Energy
Walker, A., Shah, C. & Elgqvist, E., 2020, 73 p.Research output: NREL › Presentation
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Performance of Photovoltaic Systems Recorded by Open Solar Performance and Reliability Clearinghouse (oSPARC)
Walker, H., Desai, J. & Heimiller, D., 2020, 28 p.Research output: NREL › Technical Report
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Renewable Energy Analysis: Geospatial Analysis and Maps (U.S.)
Walker, A. & Heimiller, D., 2020, 19 p.Research output: NREL › Presentation
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REopt: Energy Decision Analysis
Anderson, K., Cutler, D., Olis, D., Elgqvist, E., Laws, N., Li, X., Krah, K., Becker, B., Walker, A., Mishra, S., Pohl, J., Ericson, S., Parkhill, L., Chakrabarti, S., Eger, R., Muerdter, N., Jeffery, A. & Kwasnik, T., 2020, 33 p.Research output: NREL › Presentation
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Solar Photovoltaic Systems Time-Series Simulation: Subinterval Distribution vs. Steady-State Assumption
Walker, A., Desai, J. & McDonald, B., 2020, 23 p.Research output: NREL › Presentation
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Will Solar Panels Help When the Power Goes Out? Planning for PV Resilience
Belding, S., Walker, H. & Watson, A., 2020, 13 p.Research output: NREL › Technical Report
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2019
Building Our New Energy Future: Integrating with the Power Grid of Tomorrow
Hayter, S., Walker, H., Jackson, R., Fast, T. & Crowther, H., 2019, In: ASHRAE Journal. 61, 12, p. 60-64 5 p.Research output: Contribution to journal › Article › peer-review
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The Role of Reliability and Durability in Photovoltaic System Economics
Woodhouse, M., Walker, H., Fu, R., Jordan, D. & Kurtz, S., 2019, 34 p.Research output: NREL › Presentation
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2018
Best Practices for Operation and Maintenance of Photovoltaic and Energy Storage Systems; 3rd Edition
Walker, H., 2018, 153 p.Research output: NREL › Technical Report
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Evaluating Energy Impacts and Costs from PV Component Failures
Keith, J., Walker, H., Klise, G. & Lavrova, O., 26 Nov 2018, p. 1761-1765. 5 p.Research output: Contribution to conference › Paper › peer-review
8 Scopus Citations -
Evaluating Energy Impacts and Costs from PV Component Failures: Preprint
Keith, J., Walker, H., Klise, G. & Lavrova, O., 2018. 8 p.Research output: Contribution to conference › Paper
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Observations of PV Systems Post-Hurricane
Hotchkiss, E. & Walker, H., 2018, 22 p.Research output: NREL › Presentation
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2017
Chapter 5: Integration of Renewable Energy Technologies in Buildings and Cities
Walker, H., 2017, Sustainable Energy Technologies. Rincon-Mejia, E. & de las Heras, A. (eds.). p. 63-74Research output: Chapter in Book/Report/Conference proceeding › Chapter
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Large-Scale Power Production Potential on U.S. Department of Energy Lands
Kandt, A., Elgqvist, E., Gagne, D., Walker, H., King, J., Boak, J., Washington, J., Sharp, C. & Hillesheim, M., 2017, 226 p.Research output: NREL › Technical Report
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New Best-Practices Guide for Photovoltaic System Operations and Maintenance
Walker, H., 2017, 4 p.Research output: NREL › Fact Sheet
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Optimizing Storage and Renewable Energy Systems with REopt
Elgqvist, E., Anderson, K., Cutler, D., Laws, N., Olis, D., Walker, H. & DiOrio, N., 2017Research output: NREL › Poster
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PV O&M Cost Model and Cost Reduction: U.S. Department of Energy (DOE), Energy Efficiency & Renewable Energy (EERE)
Walker, H., 2017, 27 p.Research output: NREL › Presentation
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REopt: A Platform for Energy System Integration and Optimization
Anderson, K., Cutler, D., Olis, D., Elgqvist, E., Li, X., Laws, N., Walker, H. & DiOrio, N., 2017, 75 p.Research output: NREL › Technical Report
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REopt Improves the Operations of Alcatraz's Solar PV-Battery-Diesel Hybrid System
Olis, D., Walker, H. & Van Geet, O., 2017Research output: NREL › Poster
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2016
Catalyzing RE Project Development
Anderson, K., Elgqvist, E., Walker, H., Cutler, D., Olis, D., DiOrio, N. & Simpkins, T., 2016Research output: NREL › Poster
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Energy System Modeling with REopt
Simpkins, T., Anderson, K., Cutler, D., Olis, D., Elgqvist, E., Walker, H. & DiOrio, N., 2016Research output: NREL › Poster
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PV System 'Availability' as a Reliability Metric -- Improving Standards, Contract Language and Performance Models
Walker, H., Keith, J., Klise, G., Hill, R. & Dobos, A., 18 Nov 2016, p. 1719-1723. 5 p.Research output: Contribution to conference › Paper › peer-review
6 Scopus Citations -
2014
Case Study: Mobile Photovoltaic System at Bechler Meadows Ranger Station, Yellowstone National Park (Brochure)
Walker, H., 2014, 4 p.Research output: NREL › Brochure
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REopt: A Platform for Energy System Integration and Optimization
Simpkins, T., Cutler, D., Anderson, K., Olis, D., Elgqvist, E. & Walker, H., 2014. 8 p.Research output: Contribution to conference › Paper › peer-review
31 Scopus Citations