Ob:
Are you saying solar requires a Commonwealth Certification?
Licensed electrical contractors do it here across the Delaware from you. We have EC's that specialize in the solar niche market, and occasionally a few who dabble in something they have no clue about.
As to 'our' rules, engineer drawing (plans) for racking, electrical one-line. Permits required are Building (racking); Electric (All PV Equip)
EC's over here require 34 hours of CEU's. 9 on NEC Changes; 1 on Law; 24 on approved trade related items. All must be done each 3 year Lic. renewal.
