Question-Charging using solar panel by step-up and regulator

[prowede]

I am a newbie in electronic design,

I am going to design a charging a battery(maybe lead acid) by a solar panel

As I know the voltage of solar may fluctuate
For the solar panel I used, the max. voltage is 16.8V

I planned to use a step up converter to step up the voltage (because sometimes the voltage maybe too low) and then use a regulator to convert the voltage to a fixed one, let's say 12V and then charge the battery

Is my logic reasonable and correct?

Moreover, if I use a chip for step-up converter instead of the typical circuit, I found that the lowest input voltage is just about 1V, so what to do if the voltage of the solar panel is <1V?

Thanks

 

[Awarapunshee]

Re: Question-Charging using solar panel by step-up and regul

Use this circuit for your design.

Regards