Hi,
I've had my 18 x 280Ah EVE cells for almost a month. I connected them in series, 2 rows of 9 cells, lightly clamped. Wired up the BMS, and "kick-started" it.
They took up the same space as 2 of my 4 x 260Ah AGMs (63Kg each), which had died after 4 years, and were replaced by 40 x 200Ah...