SOLTEC Sourced these panels for all the same reasons Bloomberg listed them as one of the top, high-tech makers of PV modules worldwide. The 540W uses multi-busbar design for efficiency and bi-facing cell tech for an extra 25% power so you won’t miss a ray of sunshine. The quality built into every cell of these panels ensures reliability. The 540W  panel has the highest anti-PID  –resistance to degradation– in the market with better than 90% of original power for the first 12 years, nearly 85% of power for 25, and a guaranteed power output for 30 years.   On your next project choose the best, ILLINOIS SOLTEC sourced, and certified.