Not that great ......... out of the 16, one is high, 3 are low.
I've ordered another 4 so I can try to match the 16 cells.
I've also bought a 4 cell 5A capacitor balance (500bht), no need to balance 16 cells, I think I can just put the best and worst next to each other in the pack and just put a balance across them.
But the good news,
I now have enough storage to last 2 nights and a day in-between with no sun (lots of rain and cloud here). Today, my batteries were full by mid-day and I still had enough spare to cook lunch and run 2 computers and TVs most of the day.