Check the listing for details. 12/24V/36V/48V 60A MPPT Solar Charge Controller Auto Focus Tracking Regulator. Color: As pictures, Condition: New. Listed at 17.99 USD. MPPT Solar charge controller: 1.What is MPPT? Automatic load tracking aggregation. 2.Why "Only works with the battery connected, turn on the solar panel charges the battery, charge does not work"? Why is it less than 100A?We are a current-focus MPPT with two constantan wires designed to detect current and maximum open-load when more 1A.This technology is our patent practice, and has been recognized by the state, with a special patent certificate of invention.There is no such technology on the market. Compared with other MPPT MPPT-inductive buck-boost type, the same solar charging condition, our current-focusing MPPT current tracking efficiency is higher, because of the power loss caused by the booster and the step by step down.In fact, the effectiveness of very low light charging is very low because the input power is very small. And our MPPT can also increase the load under relatively low illumination. Our MPPT is straight-through type. When the current is greater than 1A, it will not be tested. The chain will be charged directly. Only when it is charged to 95% of the battery, will it slow down and protect the battery. As the most high-end and advanced solar charge controller, it charges the battery with the max power, MPPT tracking efficiency is 99%, and the whole system has a high power generation efficiency of 97%.Features:This product provides short-circuit protection,open-circuit protection, reverse protection, overload protection.Automatic focusing MPPT tracking charging, high charging efficiency, non-stop detection during charging, bidirectional focusing tracking.MPPT solar controller can detect the voltage and current of the solar panel in real time, and constantly track the maximum power, so that the system can always charge the battery with the maximum power.The tracking efficiency of MPPT is 99%, and the power generation efficiency of the whole system is up to 97%. Moreover, the system has excellent battery management, including MPPT charging, constant voltage average charging and constant voltage float charging.Specifications: Type A: DC 12V/24V 60A Auto Switch MPPT Solar Charge Controller Battery voltage: 12V/24V Auto AdaptMaterial: ROHS+ABSItem color: blue+blackCharge current: 30A/40A/50A/60A/100A (optional)USB output: 5V 2AItem size: 170 * 95 * 40 mm / 6.69 * 3.74 * 1.57 inItem weight: 260 g / 9.17 ouncePackage size: 175 * 100 * 45 mm / 6.89 * 3.94 * 1.77 inPackage weight: 295 g / 10.41 ounce Type B: 60A MPPT solar charge and discharge regulator 12V 24V 36V 48VAuto for Max PV 190VDC lead acid lithium battery. Features: 100% MPPT controller Intelligent Maximum Power Point Tracking Technology Built-in high performance DSP controller Automatic detection of battery voltage 12V/24V/36V/48V Three-stage charging optimises battery performance Multifunctional LCD displays Reverse polarity protection of the solar module Overcharge protection Can be easily mounted Suitable for battery types such as sealed lead acid, gel and lithium batteries You can connect two pieces of 60A in parallel, so the total power of the MPPT is 120A Supports unlimited parallel connection Item Parameter Models ICharger MPPT 6048 Chargingmode 3-stage:constantcurrent(MPPT),constantvoltage,floating SystemVoltage 12/24/36/48/Auto MaxPVInputPower 720W/12V; 1440W/24V2160W/36V; 2880W/48V MaxPVInput Voltage 190Voc Batteryvoltageautomaticrecognition 12Vsystem(DC8.7V-DC15.5V)；24Vsystem(DC16V-DC31V) 36Vsystem(DC33V-DC41V)；48Vsystem(DC42V-DC64V) Overchargingprotectionvoltage 12V system (16V)；24V system (32V)36Vsystem(48V)；48Vsystem(64V) Limitedcurrentprotection 61A Maxefficiency ≥98.1% PVutilization ≥99% AutoTemperatureCompensation -3mV/2V/ºC ProtectionFunction Temperatureprotection 75℃ Fan-ontemperature >45℃ Fan-offtemperature