NCCER Solar PV study plan

Define the photovoltaic effect and distinguish it from thermal solar collection, in writing, without notes

Identify the main PV system architectures (grid-tied, grid-tied with battery backup, stand-alone, hybrid) and state one site condition that favors each

List the shock and arc-flash hazards of DC circuits at module string voltages and explain why DC arcs are harder to extinguish than AC arcs

Apply the hierarchy of controls to a rooftop PV job: describe fall protection, lockout/tagout, and PPE choices for a given task

Recite the purpose of the NEC Article 690 sections that govern PV circuits and identify which sections cover disconnects, grounding, and marking

Interpret a module datasheet: locate Voc, Isc, Vmp, Imp, Pmax, temperature coefficients, and the NMOT/NOCT ratings, and explain what each number is used for

Calculate string voltage at record-low cell temperature using the Voc temperature coefficient and explain why cold-weather voltage is the design driver

Compute maximum PV source-circuit current per NEC 690.8 and select conductor ampacity and overcurrent protection for a sample string

Distinguish PV source circuits, PV output circuits, and inverter output circuits and state which are energized when the DC disconnect is open

Explain the function of bypass diodes and blocking diodes and the failure symptom each prevents

Compare central string inverters, DC optimizers, and microinverters on shading tolerance, monitoring granularity, and serviceability, and justify a choice for a shaded roof

Size a battery bank for a defined critical-load list and backup duration, accounting for depth of discharge and round-trip efficiency

Explain the roles of the charge controller (MPPT vs PWM), rapid shutdown system, and DC/AC disconnects in a complete system one-line

Read and redraw a residential one-line diagram from memory, labeling every disconnect, OCPD, grounding point, and labeling requirement

Identify the grounded conductor and equipment grounding conductor requirements for a PV system and explain why PV source circuits are commonly ungrounded

Perform a shade analysis method: describe how to use a solar pathfinder or smartphone sun-path tool and interpret the resulting shade window

Evaluate a roof for orientation, tilt, azimuth, rafter spacing, and structural capacity, and record findings in a site-survey format

Calculate minimum row spacing for a tilted array to avoid inter-row shading at winter solstice for a given latitude

Size an array to an annual kWh target using an insolation value and a derate factor, showing every step

Identify code-driven layout constraints: roof access pathways, setback from ridge and edges, and rapid shutdown boundary

Select mounting hardware for three roof types (comp shingle, standing seam metal, ground mount) and explain the flashing method for each

Lay out rail spacing and attachment points from the module clamp zones and the manufacturer's installation manual

Sequence a roof-mount installation from layout through module placement, and identify the inspection checkpoint before each step

Explain the structural and waterproofing risks of poor attachment and how to verify attachment into rafters or trusses

Plan a conduit run from array to inverter, including expansion, bend radius, and wet-location fittings

Demonstrate the torque and clamping requirements for module terminations and racking connections and state the consequence of under- and over-torquing

Describe how to manage module handling, stacking, and walking on a roof without inducing microcracks

Install and dress MC4 or equivalent connectors correctly, including polarity check and pull test

Explain grounding and bonding of the racking system, including listed bonding hardware and continuity testing

Identify the labeling and placard set required at the service panel, disconnects, and inverter, and state where each goes

Build a commissioning sequence: visual inspection, continuity and polarity checks, insulation resistance, open-circuit voltage and short-circuit current measurements, and inverter startup

Interpret an I-V curve trace and explain what a stepped, low-current, or shifted curve indicates about a string

Diagnose three common faults from symptoms alone: a string producing zero current, a string producing low current, and an inverter tripping on grid voltage

Explain the maintenance schedule for modules, connectors, and inverters, including cleaning cautions and thermal imaging use

Describe safe troubleshooting practice for an energized array, including when to isolate and how to verify de-energization

Complete a timed, full-length practice set across all five domains and score each domain separately

Re-teach your three weakest topics from memory in writing, then verify against your notes and correct errors

Recite the key NEC Article 690 and 705 numbers you are most likely to be tested on: voltage drop, current correction factors, disconnect placement, and labeling

Walk through one end-to-end project scenario from site assessment to commissioning, naming the code requirement and safety control at each stage