Noob lifpo4 pack building question

[Sameguy]

I am planning on building some 12 volt lifpo4 packs to be used to run a 12 volt fridge when off roading. My fridge draws 3.6 amps at momentary startup and about 1 amp while running. I am planning to use 4 3.2V 20AH prismatic cells wired in series for my first battery. 20AH isn't going to get me very far but this is somewhat a proof of concept project so if it works as I expect I will scale it up with larger cells. This is the cell I plan on using:
http://www.batteryspace.com/lifepo4-prismatic-module-3-2v-20-ah-10c-rate-64-wh-6-0---un38-3-passed-dgr.aspx

I plan to use the PCB (link below) on each cell for cell protection:
http://www.batteryspace.com/PCB-for-1-cell-3.2V-LiFePO4-Battery-Pack-at-4A-limited.aspx

Once built I would like to be able to charge it with a 100 Watt solar panel and also be able to charge it with the vehicles alternator. I know I will need a solar charge controller too and have yet to pick one out.

I have read up on cell balancing and have a good understanding of how to do it.

Do I need anything else besides the PCB mentioned earlier to protect the cells from overcharge and over discharge?

 

[Grizzl-E]

What fridge do you have? Reason I ask is does it have a low voltage cutoff built in, and is it adjustable?
Anything else you want to run of the battery as well?


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[dogman dan]

I would not want to sit up all night making sure the voltage stayed up all night. But perhaps you'd actually turn it off in the evening, since you won't open the door till morn.

Anyway, makes sense to me to at least have a circuit that does a low voltage cutoff. For those of us used to being a human bms for 10-20 cells in series, managing the balancing of 4 cells sounds pretty easy.