Solar LED Light ,20000mah Li-ion battery , 24V solar panel with MPPT charge Controller

This project is the final part in Making a really powerful Solar Light , in this project we intigrate LTC3478 Based philips lumileds Driver and BQ24650 Based MPPT Solar Li-Ion charge Controller.
We will be using total 3 9 Watt each LED Driver boards and One charge controller to charge 6 Cell 7.6V 20000mah li-lion battery,

There is 4 LED bar graph display to show estimate battery level and a single button to control On/off, Different Level of Brightness , and Select one , all or few of LED boards to litup.
there is not much to describe in term of schmeatic and firmware as all the Firmware and Schmeatic aer already on my github account.User interface panel is made out of PCB with 4 battery status LED a port for solar panel Connector and a control switch.
when battery is chargin LED status displayed accordingly and when battery is discharging led status updated accordingly.

BQ24650 Based MPPT li-ion Battery Charger Controller With MSP430 Microcontroller, MPPT adjust and 3 Channel LED PWM dimming.

In the addition to the little solar lighting project that i was working on i have created this little solar charge controller to charge lithium ion battery (li-ion).

Circuit Utilize Texas Instrument BQ24650 at the heart of loop to control charge. as circuit has external mosfet so maximum  charge current can be adjusted to really high values.  Circuit accept Solar Panel Values from 5V to 28V . i have tested it with 12V nominal (17Volts open circuit)  . and 24 Volts nominal Solar panel at Battery Charge current up to 4A. Currently installed in my house since few months Charging a 20000 mah li-ion battery.
Circuit has large 4 pin high current capacity Molex connector for solar panel , 6 pin connector for Battery and load switch.
it is also possible to connect NTC for battery temprature monitoring. BQ24650 can automaticalley monitor temprature of the battery. Microcontroller has dedicated 3 PWM output for LED dimming and 6 gpio pin header for bettery status led and a user interface key.