Year after year Phono scores 'Top performer' in the DNV-GL (formerly KEMA) Reliability test. Phono Solar is one of the best suppliers for the residential PV market. As part of the SUMEC Group Corporation (Global Fortune 500 company), it was put on the Tier 1 list by Bloomberg, so it is a financially stable company. The company invests continuously in R&D , and has been our reliable partner for years. Choose Phono, choose proven high-quality. We offer Black-White and All Black solar panels by Phono Solar.