Anyone Install Lithium ion Batteries? Results?

I am getting the Magnum 4kw output 24V input inverter also. I probably will go with the new model -H that does generator sharing for some ridiculous 7kW output. I doubt I will ever use more than 3 or 4kw though.

Morningstar, Midnite, Outback are all good controllers for solar. I am edging toward Midnite as they are buddies with Magnum (but so is Outback I think...the whole industry is inbred)