As a Tesla enthusiast I'll take a crack at this. I am not sure if you are talking about the 18650's or the 21700's but the answer should be the same. Lithium batteries are a completely different animal than SLA, AGM etc. Over charging a typical acid battery causes gassing, some melting and sometimes a fire. Charging a Lithium battery too fast, from too low of charge (which causes it to charge too rapidly) or over charging will cause the magic blue smoke to come out and very often a fire. Lithium batteries have been known to melt down at up to 2000 degrees C. This means what ever it is setting on and anything within a certain radius will be destroyed. The cells will basically become a thermite grenade and can burn through concrete.
Now that the scary stuff is over... You will require a lithium specific charger and to preserve those high dollar modules I would make it a good one with lots of safeties and monitoring. You'll get 5 - 10 times the cycles out of lithium batteries but most DIYers that I have come across (online) do not use them because they are 3x the cost at best. As for the energy usage, electrons are electrons and lights, fans and water heaters don't care from where the electrons come. The high discharge capabilities of lithium batteries may or may not require a special type of inverter but I am not sure. Drawing too much power too quick from a lithium can also start fires. There is a possibility that you won't be able to use anything common off-the-shelf electronics to use these modules for your set up and that would get expensive quick. That being said the Tesla Wall I believe uses individually fused 21700's and it includes a built in liquid cooling system to keep them from over heating. The Tesla wall is around 13kWh I believe (too lazy to google) which is marketed for around a 2,100 sq ft house so 10.6 is not too shabby. I doubt Tesla will sell components of a Tesla Wall to get you going so some further research will be required but if you already have 2 modules there is definitely a lot of potential there. I hope my rambling helped. I am also new to solar so to speak. I have been researching on and off for over a year and have been dealing with different battery chemistries in R/C's and power tools for quite some time. I am also an aerospace engineering major so if nothing else it means I know how to 'math'. lol Good luck with your endeavor. I am new here but I will definitely be checking in often so feel free to ask any more questions if you need help with your research.
- You can't put the magic blue smoke back in the box...
- The only thing that smells worse than burnt flesh is YOUR burnt flesh, electrical burns are doubly so.