Techtest 20 Amp PWM Solar Charge Controller

PWM 20A Solar Charge Controller 12V 24V LCD dual USB 5V Mobile Charger Solar Panel Battery Charge Controller Regulator 20 Amps 1. Water proof IP22 design, protected against insertion of fingers and will not be damaged or become unsafe during a specified test in which it is exposed to vertically or nearly vertically dripping water. 2. 12/24V battery automatic detect. 3. PWM charging available,3-stage charging algorithm: impulse, bulk and float. 4. Protection:Reverse battery pole connection protection, Lightning protection. 5. LED display shows system status at all times. 6. Specially having USB charging mode Safety Instruction : 1. Make Sure your battery has enough voltage for the controller to recognize the battery type before first installation. 2.The battery cable should be as short as possible to minimize loss. 3. The regulator is only suitable for lead acid batteries : OPEN , AGEM , GEL .It is not suited for nickel metal hydride , lithium ions or other batteries. 4. The charger regulator is only suitable for regulating solar modules. Never connect another charging source to the charge regulator.