Engineering & Review Methodology

Technical credibility depends on explaining how information is produced. We document the formulas, assumptions, source material, and limitations behind our guides and calculators so readers can distinguish desk research and engineering estimates from measured field results.

1. Foundations in Physics & Primary Standards

2. Transparent Mathematical Modeling

Rather than relying on black-box estimates or anecdotal rules of thumb, all computational tools and system sizing guides on Clean Power Guide expose their underlying formulas and baseline assumptions:

• Deterministic Logic: Sizing formulas, temperature adjustments, and voltage drop calculations execute client-side using deterministic equations you can verify with a handheld scientific calculator.
• Standard Reference Datasets: Solar irradiance metrics refer to empirical insolation data from the National Renewable Energy Laboratory (NREL), while conductor resistances are cited from NEC Chapter 9, Table 8 (at 75°C conductor temperatures).
• Explicit Derating Factors: Every efficiency loss—such as charge controller step-down efficiency, inverter tare standby draw, battery round-trip Coulombic loss, and dust/soiling derating—is itemized transparently.

3. The Zero-Fabrication Policy

Many publishing sites claim "independent laboratory bench testing" using stock imagery and fabricated measurements. At Clean Power Guide, we adhere strictly to honest, verifiable reporting:

• No Hallucinated Testing: We do not claim to operate a private commercial hardware testing laboratory or publish fabricated bench results.
• Theoretical vs. Empirical Clarity: Whenever theoretical equations or circuit models are presented, they are explicitly designated as calculations. When real-world installation case studies or telemetry logs are discussed, the specific operating conditions and configuration details are clearly cited.
• Commercial Independence: No manufacturer, supplier, or advertiser can purchase editorial placement, manipulate a calculation formula, or alter our technical safety assessments.

4. Continuous Review & Errata

Engineering standards and codes update on regular three-year cycles. When standards change or when readers identify potential discrepancies, our editorial team evaluates the citation against authoritative sources and publishes corrections promptly in our public Corrections Log.