NABCEP SW Associate case studies
NABCEP SW Associate · Put your knowledge to work in context.
The NABCEP PV Associate Credential is an entry-level recognition for people who want to demonstrate foundational knowledge of photovoltaic systems. NABCEP describes Associate Credentials as a distinct program alongside its Board Certifications, and the credential is aimed at job seekers, career changers, students, sales and support staff, and anyone who needs a credible, verifiable baseline in solar before pursuing advanced certification or hands-on experience. The NABCEP SW Associate case studies are 5 cases and about 2,733 words.
1Adding a Thirteenth Module to an Existing Cold-Climate String
A homeowner with an existing 12-module rooftop string asks whether one matching module can be added in series to gain about 8% more production. The modules are 410 W units with Voc = 41.6 V, Vmp = 34.8 V, a Voc temperature coefficient of -0.27%/°C, and a Vmp coefficient of -0.35%/°C.
578 words, about 3 min2Off-Grid Battery and Array Sizing for a Winter-Limited Cabin
A remote cabin uses 3.2 kWh/day of AC energy. The owner wants two days of autonomy without a generator and has chosen a 48 V lithium iron phosphate battery with 80% usable depth of discharge.
556 words, about 3 min3Winter Row Spacing on a Constrained Ground-Mount Site
A ground-mounted array is planned for a 40° latitude site with three rows of 2.0 m-long modules at 25° tilt. The back edge of each row is 1.8 m above grade, including clearance.
529 words, about 3 min4String Current Mismatch After a Replacement Module
A 5 kW residential array has two strings of ten 360 W modules. After a tree limb damaged one module, a contractor replaced it with a spare 300 W module because it was the only matching frame size in stock.
561 words, about 3 min5Failed Insulation-Resistance Test at Commissioning
During commissioning of an 8 kW rooftop PV system, the installer isolates both DC strings and performs an insulation-resistance test from each string’s positive and negative conductors to ground. String 1 reads 80 MΩ; string 2 reads 0.6 MΩ.
509 words, about 3 min