The new ones are better because they are wired in series with your house and can supply split phase power without batteries and theoretically up to their maximum outputs of 3-12kw depending on the model. Add a 48v LTO battery for a buffer and you can do better still.
Lithium iron phosphate batteries have about twice the usable capacity (from 50 percent to 80-90 percent usable capacity) and 5-10 times the cycle life. (From 500-750 cycles to 3000-7000 cycles).
So in terms of $ per available stored watt hour this is an order of magnitude improvement even if the cost per amp hour appears similar.
The new ones are better because they are wired in series with your house and can supply split phase power without batteries and theoretically up to their maximum outputs of 3-12kw depending on the model. Add a 48v LTO battery for a buffer and you can do better still.
Lithium iron phosphate batteries have about twice the usable capacity (from 50 percent to 80-90 percent usable capacity) and 5-10 times the cycle life. (From 500-750 cycles to 3000-7000 cycles).
So in terms of $ per available stored watt hour this is an order of magnitude improvement even if the cost per amp hour appears similar.