Solar Charge Controller for Lithium Ferrous Battery - 12.8V - 20amps with 9V USB Charger, Microcontroller based Digitally Controlled PWM technology based Solar Charge Controller & Regulator of 12.8V-20amps with inbuilt protections and 12V battery charging feature for LiFePo4, Lithium Ion and Lead Acid type batteries of upto 12.8V. Specially designed for recharging LiFePo4 and Li-Ion batteries that should not be charged by normal solar charge controllers used for lead acid type 12V batteries as it can damage the battery permanently by undercharging, voltage differences that may ultimately reduce the cycles of the battery.  It can be connected to a maximum of 50W solar panel with VOC of up to 19V and a battery bank of 12.8V. The controller features a smart tracking algorithm that maximizes the energy harvest from the PV and also provides load control to prevent over-discharge of the battery There are a number of protections that the Solar Charge Controller ensures. Solar Charger Controller stops reverse current flow from the battery to the solar array, it provides load short circuit protection, it provides Battery/Panel reverse protection through DC fuse and Overload protection also. Additionally, it has a 9V USB which is suitable for recharging smartphones & other smart 9V devices.