Design and Installation of PV System according to NABCEP

Learn about grid-tied solar systems that connect to the utility grid, synchronize with it, and use solar modules and inverters, with optional batteries to balance load and export excess power.

Use safety nets as the sole option when working above 25 feet, since safety lines and belts are impractical, in line with OSHA.

Lock out the solar system and keep it in the off position to prevent others from switching it on and causing electrocution, a crucial protection when working in electrical fields.

Explore the fundamentals of electricity, including how to calculate power, voltage, current, resistance, and grounding in home electrical systems, with applications to design and installation of pv systems.

Learn the core electrical formulas for PV system design, including Ohm’s law and voltage drop, to calculate battery energy in ampere-hours and kilowatts.

Explore direct, diffuse, and albedo radiation and how they combine into total solar irradiance. Learn how irradiance meters and direct beam detectors measure solar radiation for PV system potential.

Explore open-circuit voltage (Voc), short-circuit current (Isc), and the maximum power point (Vmp/Imp), and learn how module mismatch and series connections affect PV system performance.

Explore how irradiance and temperature affect a PV module’s voltage and current, including open-circuit voltage, maximum power point, nominal operating temperature, and module labeling under 1.5 air mass.

Explore pv system components, including inverter types, power optimizers, dc-dc converters, ac modules, pv wire, mc-4 connectors, and conduit, and learn how modules connect to form strings.

Calculate open-circuit voltages for a Newark installation with temperature corrections, and determine series strings per mppt to keep module voltage and current within nabcep guidelines.

Determine the maximum and minimum number of series modules to the inverter by considering the inverter dc power limit and temperature-based degradation of module performance, using vampy and bemax values.

Explore the mechanical design of solar systems, comparing ground-mounted and tracker mounting, wind loads up to 150 km/h, and efficiency differences.

Describe the ballasted system for PV installation, using concrete blocks (paving stones) to ballast the array, with pressure and wind-load considerations when the roof cannot bear extra weight.

Assess ventilation system types and their load bearing capacity in PV installations, ensure proper ceiling penetrations, and verify leakage with Testopel after installation.

Explore single axis and horizontal axis trackers for PV systems, illustrating sun tracking from morning to evening and how a DC motor increases production while considering cost and maintenance.

Commission PV systems by a qualified electrical professional who tests grounding continuity, polarity, voltage, and overall functionality, measures irradiance, and refrains from commissioning if parameters fall below 500.

Perform insulation resistance testing to verify the integrity of the electrical system, identify damaged components across modules, and assess wiring degradation and ground connections through circuit disconnection and testing.