Unfortunately the batteries degrade in other ways beyond mere capacity. I’m not an expert but a comment here says resistance also increases, so I would guess yo

Unfortunately the batteries degrade in other ways beyond mere capacity. I’m not an expert but a comment here says resistance also increases, so I would guess you end up with lower capacity and also slower charge/discharge rates, and lower efficiency. I would hazard a guess that the battery becomes effectively useless before “capacity” actually reaches 50%. I do wonder if this is a matter of going from 500 to 1000 cycles, or if it’s more exponential decay so we’re talking just 100 cycles between “no longer good enough for the EV” to “no longer good enough for the house/grid”.