EcoFlow Solar MC4 Parallel Connection Cable. This top-of-the-line MC4 Parallel Connection Cable allows for current flow up to 30A with a 3M length. This cable is designed, tested and certified to meet global safety standards. It offers high flexibility, a long life cycle, and maximum heat and abrasion resistance.. Highlights. Connects solar panels in parallel to improve the charging rate efficiency.. Required to connect 4 solar panels in parallel to recharge DELTA.. Required to connect 2 solar panels in parallel to recharge RIVER Series.. In the Box. MC4 Solar Parallel Cables ×2