Want LiFePo4 charger that can...

[fireofenergy]

Handle the 17 or so volts from a 10 to 50 watt panel, and convert it to the necessary 3.6v needed to charge a LiFePO4 (I plan to have at least 10Ah to at most 40Ah). This is for a powerful solar utility light made with a single Cree XML (or two in parallel). I understand that the switching converter would output about 4.5 times the input current (and thus must be robust). I also would need a decent (but also inexpensive) lifepo4 PCB, to prevent overcharge. Since these batteries can be (mostly) charged in as little as 45 minutes, I think it would be cool to be able to charge multiple portable lights that are as bright as "normal 120v" lights from a single 30 watt panel.
How would I best learn more about getting these parts (or in having a complete all in one circuit board)?
Thanks

[Mike90250]

Everyone wants one. But the chargers need to be designed for each battery pack style, or you have a mess when it cooks. They are much less forgiving than lead acid batteries.

[fireofenergy]

Ya, I figured the wall and other sources are not "perfectly" constant voltage, why not from a panel. Actually, was wondering if such a devise (in excess of 10A or so) exists yet...
Thanks.
Ok, another question...
I just got a 30 watt panel and want to charge up some lead acids. I want a SLA and was wondering if it matters which brand I buy, for such a small system? (Ebay sellers don't seem to list dates and plate thickness)

[Sunking]

You got to make one or modify an existing charger.