Friendly. Knowledgeable. Helpful.

“Hope to do more business with you in the future. altE rocks! Best customer service anywhere!” – Joe Stratham, NH

877-878-4060

Offices ARE NOT accepting walk-ins.

How to Wire a Solar System

Learn to calculate NEC-compliant wire sizes for an off-grid or grid-tied solar PV system, including de-rating calculations for temperature, conduit fill, distance off the roof, and more.

877-878-4060