small lithium iron phosphate battery

There are a ton of these 300 ah batteries now.  Many owners have installed the 230 AH LiTime battery in the 400, so compare the measurements of this battery with a 300 ah battery.  Seems the 300 AH batteries are about 1.5 inches longer than this 230 AH LiTime.

The "50 percent" number for a lead acid is designed to give you the most amp hours for each cycle, but to allow for an "optimum" number of cycles.  Only cycle to 30 percent will give you more cycles over time.  Cycling below 50 percent, or lower, will give you less cycles over time.  The life span of a lead acid battery is directly related to how the battery is cycled.  I managed to get my "first" battery to last for 5 years, but I have a pretty optimum parking spot here at home, and I paid close attention to the status. Keeping a lead acid battery alive for 3 years is...not too bad, especially with having to learn all this sort of thing on the fly. 

Lithium batteries have the same basic lifetime parameters.  But, since we get more amp hours to use for each cycle, in theory we would not be cycling so deeply compared to a lead acid battery.  So, lithium batteries can deliver many more cycles than a lead acid setup might be able to.  Chart below shows the various discharge levels and the "theoretical" number of cycles.  If: your 225 amp hour setup allowed you to use 112 amp hours to reach the 50 percent level, that would optimize the "lifetime" of a battery.  Note how the 40 to 60 "depth of discharge" for a lithium battery (the LIPO4 column) for a 230 amp hour battery.  50 percent of that lithium would allow somewhere between 1500-3000 cycles.  These lithiums will outlast us all!

Depth of Discharge	Discharge cycles
	NMC	LiPO4
100% DoD	~300	~600
80% DoD	~400	~900
60% DoD	~600	~1,500
40% DoD	~1,000	~3,000
20% DoD	~2,000	~9,000
10% DoD	~6,000	~15,000