As the most high-end and advanced solar controller, it charges the with the max , MPPT tracking efficiency is 99%, and the whole system has a high efficiency of 97%.

Features:
This product provides short-circuit ,open-circuit , reverse , overload .
Automatic focusing MPPT tracking , high efficiency, non-stop detection during , bidirectional focusing tracking.
MPPT solar controller can detect the voltage and current of the solar panel in real , and constantly track the maximum , so that the system can the with the maximum .
The tracking efficiency of MPPT is 99%, and the efficiency of the whole system is up to 97%. 
Moreover, the system has management, including MPPT , constant voltage average and constant voltage float .

Specifications:
voltage: /24V Auto Adapt
Material: ROHS+ABS
Item color: blue+black
current: 30A, 40A, 50A, 60A, 100A (optional)
USB output: 5V 2A
Item size: 170 * 95 * 40 mm / 6.69 * 3.74 * 1.57 in
Item weight: 260 g / 9.17 ounce
Package size: 175 * 100 * 45 mm / 6.89 * 3.94 * 1.77 in
Package weight: 295 g / 10.41 ounce

Notes:
1. What is MPPT? 
Automatic load tracking aggregation. 
2. "Only works with the connected, turn on the solar panel charges the , does not work"?  is it less than 100A?
are a current- 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 -boost type, the same solar condition, our current-focusing MPPT current tracking efficiency is higher, because of the loss caused by the and the step by step down.
In fact, the effectiveness of very low light is very low because the input 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 will be charged directly. Only when it is charged to 95% of the , will it slow down and protect the .

Package list:
1 * Solar controller