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Take command of your off-grid solar power system with this new and improved 20A MPPT charge controller. Unlike a basic PWM Controller, this charge controller is compatible with sealed lead-acid, flooded, and gel batteries (all deep cycle). The Commander keeps your batteries from becoming over-charged or over-discharged, increasing the longevity of your batteries. This high tech controller features Multiphase Synchronous Rectification and Maximum Power Point Tracking technologies, which increases charging efficiency and improves system performance.