| name | chemistry DOD | nominal voltage | AH | $ | min advertised cycles | lifetime WH | min lifetime WH per $ |
| battelborn | 0.8 | 12.8 | 100 | $949.00 | 3000 | 3072000 | 3237.09 |
@SolarRat please double check my math and add a row for an FLA of your choice.
Not saying you are wrong just want to see the numbers.
You can't always use the same parameters to compare different batteries. I could use some parameters to make LA's always come out the winner, and other parameters always have lithiums come out the winner.
Your chosen parameters are all dependent on the amount of advertised(!) cycles, which in some cases doesn't matter one bit. For instance, on average I probably only use the electric motors on my boat for about 1 cycle per week. People with off-grid weekend cabins, RV's that are used a few times a month, or UPS/battery backup systems for occasional emergency use etc all fall in the same category as me....the cycles don't mean squat.
A FLA battery bank, when properly cared for (always charged, <50% DOD etc) should last over 1000 cycles, some much more, some much less. But let's say I'm always using my boat longer than I should and discharge down to 75% here and there. I still get hundreds of cycles, which is many many years. In most cases, calendar age does mine in long before cycle count, usually about 4-5 years on an open boat in the hot Florida sun, but others in cooler climates and out of the sun can go 10 years.
For daily cycling use, reputable lithium batteries will/should beat LA's
if they both last their rated cycles. Not much disagreement there. But they have to last their rated cycles first, and that could be well over 10 years. I'm in the "I'll believe it when I see it" camp. Some batteries, like Winstons, have been around a long time and there is plenty of first hand accounts of how long they may last. They can do 10+ years in a properly designed system, no problem. But put them in a poorly designed system, overcharge or overdrain, and they may not last as long as LAs. These new blue mystery batteries have to prove they can outlast LA's before I would even consider them an option. I've read too many stories of them failing in months or a couple years...so I'll stick to LA's until the good ones get separated from the junk that won't last 2 years.
So my plan is to use cheap LA's on my boat for the next few years, and I expect lithium battery prices to drop 50% by the time I need to replace my latest bank. Then, it will be a no-brainer to switch. And by then, there should be much better options for BMS's, and maybe charge controllers will actually be designed for lithium batteries rather than today's CC's that were designed for LAs but warmed over and sold as "lithium capable".
