One Year Update:
Well, I'm jumping the gun on this a bit. But in celebration of SPA day (solar power appreciation) I tested my lithium cells to monitor cell drift/balance.
Here's the result
To wit, after one year we have these results:
* no cell drift. None. Zip. Zero.
* efficiency far surpassing expectations
* no maintenance other than monitoring
* = happy Creek
And I've found a nice niche product to sell. SESS with lithium. I call them PowerWings.
And a big shout out to all who have helped. You folks are the best. Thank you.