Bests & Worsts Reviews from Amazon

I am pourya, a PhD in power electronics and I design renewable energy systems. You might not know how much 60W panel is. A normal car battery is 100Ah which means for 100 hours it can provide 1 A. The voltage is 12V so it can provide 12*100=1200Wh of energy. This panel is 60 W. reaching the nominal values for renewable sources are very rare. So we call this a 50W panel. After 1 hour it delivers 50Wh energy. Now to charge our battery you need 1200/50=24hours of charging. Each day will give you 8 hours of good energy in texas. So you need 3 days to charge 1 car battery. ( but since you never fully discharge your battery, it might be 2 days ). Now you should consider the rate of your consumption. If you want to use the battery simultaneously, it becomes very important that you consumption rate is below 60W which is basically a lamp in a car. So you are just discharging your battery and the panel is reducing the rate. I don't have this unit. But I know the price is high. With 200-250$ you can get 200W panel not a 60W one.