Solar & Renewable Energy

An introduction to the solar trade: what PV installers do and where they work, how a photovoltaic system works, site assessment and design basics, installation methods and the NEC, the trade's safety hazards and controls, and the NABCEP credentials, licensing, and career path.

How a PV system is actually designed to Code: reading the single-line diagram, temperature-corrected string sizing under 690.7, conductor and overcurrent sizing under 690.8 and 690.9, voltage drop, choosing an inverter architecture and DC/AC ratio, rapid shutdown and grounding, supply-side and load-side interconnection with a worked 120% rule example, and the labels and plan set a permit needs.

Batteries paired with solar, from the homeowner's garage to the utility substation: why storage pays, battery chemistries and specs, AC- vs DC-coupled systems and backup design, sizing with a worked example, the codes and fire safety that govern ESS (NEC 706, UL 9540, NFPA 855, IRC R328), commercial and utility-scale storage, and installation, commissioning, and the NABCEP ESIP credential.

Everything between the signed contract and the day the system turns on — and the money behind it: the project lifecycle to permission to operate, building and electrical permits, fire setbacks and HOAs, utility interconnection and IEEE 1547, net metering versus net billing, federal incentives after the 2025 changes, state incentives and SRECs, cash, loans, leases, PPAs and C-PACE, honest production estimates and simple payback.

Solar beyond the house: C&I rooftops, carports, community solar, and utility-scale fields; ballasted versus attached roof systems, roof warranties and wind uplift; driven piles, geotechnical work, fixed-tilt and single-axis trackers; combiners, inverters, medium-voltage collection, transformers and substations; the EPC model, project roles and the interconnection queue; and construction sequencing, safety, commissioning and turnover.

Keeping PV systems producing for decades: commissioning tests and documentation, monitoring and performance ratio, finding ground faults, arc faults, inverter errors, connector and wiring failures, thermal imaging and drone inspections, O&M contracts and preventive maintenance done safely under NFPA 70E, and how product, performance, and workmanship warranties and claims work.

A practical guide to NABCEP credentials: which certification fits your role, how to document eligibility and training, what the exams cover and how to study, the solar math you must know cold with worked examples, strategies for code questions and the clock, and how recertification and the credential build your career or business.

The renewable trades beyond the solar array: small and utility-scale wind, ground-source geothermal heat pumps, micro-hydro, biomass and solar water heating, EV charging installation under NEC 625, and how a contractor fits the licenses and crews together into a renewables business line.