NABCEP Site Assessment 5

Question 1

What does the term 'solar window' refer to in the context of a site assessment?

Accepted Answer

The unobstructed arc of sky through which the sun travels and delivers usable solar energy

Answer

The solar window is the unobstructed portion of the sky through which the sun passes during productive hours, and obstructions within it reduce energy production.

Question 2

A site assessor identifies that the proposed location is in a fire hazard severity zone. What additional code requirement typically applies?

Accepted Answer

Setbacks from ridges and edges must be maintained for firefighter access

Answer

California and other jurisdictions require specific setback distances from roof edges, ridges, hips, and valleys in fire hazard zones to allow safe firefighter access and ventilation.

Question 3

During a site visit, the assessor measures an azimuth of 195° for the best roof surface. How would you characterize this orientation for a US installation?

Accepted Answer

Slightly west of due south, generally acceptable with minor energy penalty

Answer

195° azimuth is 15° west of due south (180°); this slightly west-of-south orientation is generally acceptable and may even benefit time-of-use customers who need afternoon production.

Question 4

What is the primary purpose of measuring the distance from the proposed array to the main electrical panel during site assessment?

Accepted Answer

To calculate wire sizing and voltage drop for DC and AC conductors

Answer

Conductor length between the array and panel determines resistance and voltage drop, which must be kept within code limits (typically ≤3%) and influences wire gauge selection.

Question 5

An assessor finds that a customer's property is subject to an easement. Why is this relevant to a solar installation?

Accepted Answer

An easement may restrict structures or installations within the easement area, potentially limiting array placement

Answer

Easements grant third-party rights over portions of a property, which can restrict the placement of structures like solar arrays within that area.

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

(NABCEP) North American Board of Certified Energy Practitioners Solar Practice Test

NABCEP Site Assessment 5