Technical Reference
Solar Fuses and Breakers: NEC Overcurrent Protection Guide
NEC 690.8/690.9 overcurrent protection explained: the 156% sizing rule, Class T fuses, MRBF, DC breakers, and fuse sizes for every part of a DIY solar system.
Technical Reference
Wire gauge charts, NEC code requirements, battery configurations, fuse sizing, and other evergreen reference material.
Technical Reference
Understanding the 30% Federal Solar Tax Credit (ITC) in 2026
How the federal solar Investment Tax Credit works in 2026, what qualifies for DIY systems, and how to claim it on Form 5695. Save $3,000+ on a typical build.
Technical Reference
MC4 Connectors and Solar Wiring: Crimping, Tools, and Best Practices
How to crimp MC4 connectors correctly, which tools you need, wire types for outdoor solar runs, and why mixing connector brands causes failures and fires.
Technical Reference
NEC Code Requirements for Residential Solar: A DIY Reference
NEC Article 690 in plain language — rapid shutdown, grounding, overcurrent protection, wire sizing, and what inspectors actually check.
Technical Reference
Solar Wire Gauge Chart: Complete AWG Reference for 12V, 24V, and 48V Systems
AWG wire sizing tables for 12V, 24V, and 48V solar systems. NEC ampacity ratings, voltage drop calculations, and derating factors for every common scenario.