Since many converters are only 50 amps, with just two SiO2 the charging rate is maxed out. In other words, the fast charging ability of Li (dc super charging) is not really used in a "house battery" situation.
My 40% to 90% was taken from Li battery maker's web sites. That's the range where the maximum number of cycles is best.
There are many web sites which recommend storing Li at 40 to 50%, again for longest life. So Li owners, if they want best life span, get to start trips with batteries that are only at 50% state of charge.
That leaves really just one advantage for LI. Weight.
Li are not forgiving of abuse. SiO2 are.
If you still really want Li batteries try to buy wholesale from:
http://www.ablithium.com/I see articles saying that the $100 per kilowatt barrier has been breached in the LI world. If that is the case, some one is making a killing on selling Li to RV'ers.
