Redflow pins post-Covid hopes on Gen 3 battery – and a market beyond lithium-ion, page-7

as a fishing sinker?
they don't require full drain so i miss your point.
so if you have a lithium at 30% charge and no sun for a week ( yep you lose a tiny % daily) you still have 30% next week but with RFX at some point battery will need to be cycled . That was my only point and it only matters in critical back up situations where mains , sun/ solar will be down at same time as battery cycles.

My other point is you can buy lithium in various sizes to suit area to be installed and energy required rather than 10kw blocks of fixed size.

Yes I am fully aware of conditions of the room or are they need to be placed in and what is sensible and I would not have a lithium battery in occupied are of a residential property or near any exit to one due to run away fire risk should one fail.