Red tops are for major CCAs. Yellow and Blue for deep cycle.

Newer Li-Ion batteries are better at NOT loosing capacitance than the earlier ones. That being said, Lead-acid is still better at capacitance retention where Li-Ion is lighter and can store more energy per unit weight and unit volume. Li-Ion also tend to have a higher number of cycles/lifetime (~1200 versus 500-800 cycles).

So at a hypothetical 1200 cycles/lifetime and 1 cycle/day (average), that's 1200 days or 3.28 years. For my situation of $2100/year for diesel, my battery pack would have to cost less than $7000 to break even, and that will not include charging costs. If production of Li-Ion cells that are more durable and longer lasting takes place, then then cost could conceivably be reduced. But it will not happen until the industry sees a demand for it.