Executive Guide

Solar Plant Cost Benchmarks

Solar costs move quickly. Using benchmarks older than 12 months materially distorts project viability. This framework focuses on the ratios that stay stable.

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Utility-scale ratios (2025)

Modules: 32–38% of total. Inverters: 6–9%. Structures: 8–12%. BOS (cables, transformers, protection): 10–14%. Land & civils: 6–12%. EPC premium: 8–14%. Grid connection: highly site-specific.

Financing model inputs

Debt tenure 15–18 years. DSCR floor 1.30x. Availability warranty 98%+. Degradation 0.4–0.5%/year for T1 modules. O&M $6–$10/kWp/year.

Turn this framework into a bankable budget

The Industrial Project Budget & Cost Planner captures every dimension covered in this guide — procurement, logistics, engineering, contingency, financing readiness and risk — in a single dashboard, then hands off to the Enterprise RFQ Builder.

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Frequently asked questions

Merchant vs PPA — how does it affect budget?

Merchant projects require 40–50% equity vs 25–30% for contracted PPA projects.

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