Features 1MPPT solar panel regulator adopts single chip control which supports the advantages of intelligence strong adaptability and reliable function etc. 2Work at the best power point of the I-V curve with an efficiency of up to 99% such solar charger uses MPPT maximum power point tracking technology. 3For high-accuracy temperature detection and compensation circuit battery life can be more durable. 4Supports 12 / 24V system voltage automatic identification such solar charger supports three-stage battery power display intuitive and clear. 5Exquisite structure and accurant circuit design maximize the use of the entire controller space. 6Keeps 5V output with USB connector this battery controller can meet the charging needs of digital products practical. 7And this battery controller is with overcharge protection over discharge protection over current protection short circuit protection and anti-reverse protection. Specification Item Type: MPPT solar controllerController Model: CPY2420Rated Charging Current: 20ARated Discharge Current: 20AMPPT Tracking Efficiency: Maximum: 99%Overload and Short Circuit Protection: 1.5 times of rated currentNo-Load Loss: <10mOvervoltage Protection: 16V; x 2 / 24VUSB Output: 5V 1AWorking Temperature: -35 to + 55 Package List 1 x MPPT Solar Controller1 x User Manual