Charge controller- Is it necessary?

WEEK 8

Title: charge controller
Objective: To know how much this project need the charge controller.
Content: Remember the previous post where I have given a link that contribute to develop this magic mat? As I go through the web page I saw some interesting component that may used for this project. The component that I want to discuss is the charge controller. Look at below description regarding the component. 

Q: WHY SHOULD YOU USE A CHARGE CONTROLLER TO CHARGE YOUR LEAD ACID POWERPACK BATTERY WITH SOLAR / WIND / PEDAL POWER?    

Short & Easy Answer: Because if you pedal too fast and generate too high of a voltage from your bike generator, you could dramatically shorten the life of your battery / powerpack.

Longer more technical answer:  Your battery / power pack has a limit on how high of a voltage it can see while charging.  One term to describe this voltage is called the "Peak Charge Voltage".  If you pedal too fast and generate too high of a voltage, then you could exceed the peak charge voltage and supply your battery with too much current.  This would damage the cells inside and affect their ability to take a charge. 

 In most cases the peak charge voltage for a lead acid / AGM (absorbed glass mat) battery / powerpack is somewhere near 14.8V DC (V= Volts DC= Direct Current).

Analysis: But here, I wondering that the charge controller really can be used for this project. Is it necessary or not? I hope right after this project is work out then this question will be answered, depending on the value of the output comes out.

Reference:  http://pedalpowergenerator.com/PPG-12-200-nc25a-charge-controller.htm