300 cycles is less than a year’s use.
Lithium Titanium cells do 20,000 cycles to 80% today at 100% depth of discharge. There is a company in Australia that warranties their cell packs for 20 years and says they will do 60,000 cycles till end of life. Those cells are being used for off grid solar homes and microgrids in the outback where there are no power lines at all its the outback after all..
There is no less than two aluminum cell technology that also do 10000+ cycles the one I posted only lost 1% not 20 in those 10000 cycles they expect the cells to do 100000+ cycles before they declare them end of life.
Sodium ion has two techs that do 20000 and 50000 cycles with the 50,000 Prussian blue cells already in commercial production for grid level use here in the USA. When not if they make a small scale 50kWh pack I’m buying one or two for my off grid set up in Johnson City at the family compound.
Nickel is interesting research but there is better tech already in commercial use.