Technical credibility requires absolute transparency regarding how information is produced. Readers deserve to know precisely how our guides and calculators are constructed, the standards we reference, and our uncompromising standard of factual truthfulness.
1. Foundations in Physics & Primary Standards
1. Engineering Physics
Calculations are derived directly from classical physical laws: Ohm's Law (V = I × R), Joule heating (P = I2R), the Betz aerodynamic limit (Cp ≤ 59.3%), and hydraulic friction formulas (Hazen-Williams / Darcy-Weisbach).
2. Electrical Safety Codes
Circuit sizing, ampacity derating, disconnect requirements, and overcurrent protection adhere to the National Electrical Code (NFPA 70 / NEC Articles 690, 705, 430, 480) and IEEE photovoltaic guidelines.
3. Manufacturer Specifications
Component parameters (temperature coefficients, BMS disconnect thresholds, inverter tare draws, surge timelines) are verified directly against published manufacturer engineering datasheets and UL/IEC safety certificates.
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.