
Utility-Scale PV System Design Optimizer
Optimize utility-scale PV array layouts, electrical configs, and BOS designs
What You Can Do
You can rapidly generate optimized PV system designs that synthesize site characteristics, equipment specifications, electrical standards, and performance requirements into actionable array layouts and electrical configurations. This skill accelerates design iteration by systematically evaluating competing constraints—energy capture maximization, electrical loss minimization, grid code compliance, thermal management, and cost optimization—without replacing professional engineering judgment, ensuring designs align with industry best practices.
Features
generates fixed-tilt and tracking configurations considering site topography, shading analysis, and space utilization
calculates optimal string sizing, voltage levels, and combiner box arrangements to minimize resistive losses
matches central, string, or hybrid inverter architectures to system scale and electrical requirements
recommends transformer capacity, switchgear ratings, cable sizing, grounding design, and disconnects
estimates annual energy production (PRy), capacity factors, and thermal losses for baseline and alternative designs
ensures designs meet utility voltage limits, harmonics standards, and fault protection requirements
rapidly evaluates multiple orientations, equipment selections, and configurations for comparative analysis
provides preliminary cost estimates and performance metrics for early-stage project evaluation
Example Output
Example 1: 50MW Fixed-Tilt System Design
- Array configuration: 2,667 strings × 20 modules (500W) = 26.67MWdc
- String voltage: 770V DC (optimal for 1500V transformer secondary)
- Combiner layout: 8 combiners × 334 strings, feeding 4 string inverters (6.25MVA each)
- Conductor sizing: 2/0 AWG (60m max run), estimated losses: 2.1% at rated power
- Transformer: 30MVA, 1500V DC to 480V AC, cooling load: 450kW
- Annual production estimate: 85.2 GWh (PRy 71%), peak monthly output: July 8.2MW
Example 2: Tracking System Trade-Off Analysis
- Single-axis tracking adds 8.5% annual production vs. fixed-tilt (+7.2 GWh/year)
- Capital cost premium: +12% tracker hardware + foundation upgrades
- Electrical complexity: increased string count (3,100 strings), requires dual-inverter redundancy
- Recommendation: tracking justified for sites >900 kWh/m²/year GHI
What's Included
- SKILL.md instruction file with design methodology and constraints framework:
- Array Layout Worksheet: site dimensions, topography inputs, shading analysis matrix
- String Configuration Calculator: voltage drop, losses, and optimal string length recommendations
- Inverter Selection Checklist: equipment specifications, power factor requirements, and backup power needs
- Balance-of-System Design Template: transformer, switchgear, cabling, and grounding specifications
- Performance Modeling Calculator: GHI data inputs, performance ratio assumptions, and annual production estimates
Who It's For
- Solar engineers — designing utility-scale projects from feasibility through detail engineering phases
- Project developers — evaluating technical and economic viability during site assessment and planning
- EPC contractors — accelerating bid preparation and preliminary design for competitive proposals
- Utility planners — assessing distributed solar interconnection impacts and BOS infrastructure requirements
- Energy consultants — conducting preliminary feasibility studies and comparative technology analysis
Best For
- Preliminary system design and baseline configuration generation
- Array layout optimization for complex terrain and shading constraints
- String configuration and electrical loss minimization analysis
- Inverter architecture selection and sizing recommendations
- Design iteration and comparative scenario evaluation (fixed vs. tracking, central vs. string inverters)
- Early feasibility assessment and performance prediction
- Balance-of-system specification and component selection







