PWM Solar Charge Controller - Adam's Arduino Projects - YouTube
Fuzzy PWM based on Genetic Algorithm for battery charging - ScienceDirect
pwm - pulse charging lead acid battries effects and side effects - Electrical Engineering Stack Exchange
Amazon.com : ExpertPower 10A PWM Solar Charge Controller for LifePO4 Battery | 12V / 24V Auto-Select Intelligent Regulator | Max PV Input 55V | USB Charge | Backlight LCD Display : Patio, Lawn & Garden
PWM - Arduino Lithium Ion Battery Charging Circuit - Ideas / Modifications? - Project Guidance - Arduino Forum
Electronic Circuits, Transformerless Power Supply, LED Drivers, Battery chargers, Solar Circuits: Make a PWM Controlled Cell Phon Battery Charger using IC555
PWM Solar Charge Controller - Working, Sizing and Selection