October 2025 monthly performance summary for NREL/SAM. Focused on delivering high-value features, stabilizing data workflows, and improving cross-platform usability. Three core initiatives were completed: (1) refined Battery Dispatch Messaging Clarification to provide precise, user-facing guidance across FOM and BTM configurations; (2) Cash Flow Export Enhancement to make Excel exports more robust—includes a fallback simulation when no results are present and validation that the model is cash-flow-based, along with clearer user messages; (3) Solar Resource Download UI Refactor and API Adaptation, restructuring the UI into three forms (Download, Information, Library), adding initial PVWatts tests, supporting multiple coordinate formats, integrating a new geocode/time zone API, and Mac-compatible UI adjustments. Overall, these efforts reduce user confusion, improve data reliability, and enhance cross-platform usability while aligning with external data sources.

September 2025 monthly summary for NREL/SAM (repo: NREL/SAM). Delivered UI and configuration enhancements across PV, battery, and macro workflows, producing clearer user guidance, more accurate sizing, and reduced maintenance cost. Key deliverables include: (1) January 1 day of week UI consistency—UI label consistency and messaging aligned across Electric Load, Financial TOD Factors, and related calculators; start day labels updated to match load/tod factors. (2) PVWatts Battery configuration upgrade—added total module area support and migrated to the new detailed PVWatts Battery configuration (commits including the messages: "Allow module area for PVWatts Battery configs (#2107)" and "Version upgrade fixes"). (3) PVsyst OND/PAN to SAM macro improvements—enhanced error handling and guidance, with updated documentation (commit: "Update PVsyst OND - PAN to SAM.lk (#2112)"). (4) Battery Dispatch Options UI and messaging enhancements—refined UI spacing and improved dispatch messages and guidance for DC/AC, grid limits, and manual dispatch (several commits including spacing adjustments and updated messages). (5) PV sizing reporting enhancements—added annual inverter power limiting losses graph, improved calculation losses, and export improvements, with macro placement reorganization (commit: "SAM 2102 PV Sizing macro annual values issue (#2103)"). Also completed internal cleanup to remove debug messages in the upgrade script to improve maintainability. Overall impact includes improved user experience, more reliable results, and smoother upgrade paths. Technologies showcased include UI/UX refinements, macro integration, error handling improvements, documentation updates, and code cleanup.

In August 2025, focused on enhancing macro-driven UX, stabilizing navigation, and reducing maintenance overhead for the NREL/SAM repository. Improvements emphasized user onboarding, reliability of macro navigation, and codebase simplification to support faster delivery and lower maintenance costs.

July 2025: Delivered core SAM enhancements with clear business impact. SfA macro: implemented blended rate calculation and bill savings, added ABUC/SGCR calculations, improved output formatting, and published comprehensive usage documentation; updated calculation path to use annual_energy for consistency. PV degradation widget: UI polish for PV battery degradation widgets—refined layout, text color, sizing, and data presentation for clearer insights. Map migration: migrated mapping services from Bing Maps to Azure Maps API, updated geocoding and static map logic, added time zone retrieval option, refined zoom levels, and strengthened error handling. These efforts improved billing accuracy, user experience, and system reliability, while showcasing proficiency in macro development, UI/UX polish, and API migrations.

April 2025 performance snapshot: Cross-repo delivery across NREL/ssc and NREL/SAM focused on reliability, data integrity, and user-facing improvements that drive business value. Delivered robust data processing, refined rate lookups, improved UI behavior, and updated documentation, enabling faster analysis, accurate reporting, and clearer user guidance.

March 2025: Delivered CEC Module CSV Data Preparation Guide Enhancements for NREL/SAM, focusing on improving data prep workflows and compatibility with SAM UI and LK script; this work reduces CSV handling errors and accelerates user onboarding.

February 2025 performance summary across NREL/SAM and NREL/ssc focusing on delivering business value through feature delivery, bug fixes, and code quality improvements. Highlights include enhanced PV reporting customization, standardized utility billing terminology, wind modeling reliability improvements, and configuration simplification, translating to clearer analytics, reduced maintenance costs, and more robust simulations.

Monthly summary for 2025-01 - NREL/SAM (Business value and technical achievements). Key features delivered: BTM Cash Flow Calculation and Reporting Enhancements; includes exclusion of land lease expenses for hybrid configurations to prevent double-counting in O&M, addition of fuel O&M costs for fuel cells, and fix for Send-to-Excel export of the BTM fuel cell energy item for accurate financial reporting. Major bugs fixed: Send-to-Excel export issue resolved for the BTM fuel cell energy item. Overall impact: improved accuracy and reliability of cash flow and financial reporting for BTM configurations, enabling better decision-making and stakeholder trust. Technologies/skills demonstrated: cash flow modeling enhancements, reporting pipeline improvements, Excel export integration, configuration management for BTM hybrids, and disciplined version control.

December 2024 monthly summary for NREL/SAM and NREL/ssc focused on migration reliability, data integration, UI clarity, and safety improvements that deliver measurable business value. Key work delivered enhancements in upgrade automation, data sources, UI/config consistency, and documentation, along with targeted bug fixes to prevent invalid exports and ensure stable file generation.

November 2024 performance highlights for NREL SAM and SSC: data-library expansions, API resilience, UI branding refinements, and modeling consistency. Expanded Fall 2024 inverter and PV module libraries enable more accurate system analyses with up-to-date hardware options. REopt API integration was stabilized (SAM) and updated to API v3 (SSC), including robust error handling and sensible defaults. A 6par solver crash was eliminated by initializing variables. UI and documentation improvements standardized revenue labels, updated help topics, refreshed branding, and improved SAM documentation for Beta. These efforts improve analysis accuracy, reduce runtime errors, and provide a consistent, easier-to-use experience for customers and internal teams.

Month 2024-10 — Delivered targeted documentation improvements to enhance model usability and accuracy across NREL/SAM and NREL/ssc. Key features delivered: terminology alignment for Generation Profile across SAM models to replace 'Custom Generation Profile' with 'Generation Profile' in documentation. Major bugs fixed: corrected the losses label in pvwattsv8 documentation and clarified the firstyear_revenue_dispatch2/3 descriptions in the singleowner module. Overall impact: clearer guidance reduces user confusion, accelerates onboarding, and lowers support queries; supports consistent model integration and accurate parameter interpretation. Technologies/skills demonstrated: documentation engineering, Git-based collaboration, cross-repo coordination, and terminology standardization.