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The only real difference between using and storing your vehicle is the need for a "full tank" on a daily basis and the impracticality of maneuvering to a 50% SOC, changing your charger settings, etc., if you're going to be driving the truck again in a day or two. But if you don't need a "full tank," keeping your truck "in storage" as much as possible is going to be better, as Ford describes in the truck's own manual...The company is the world’s best lithium iron phosphate car battery supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
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I do the same as Maxx. In 1.25 years, I've only put miles on my truck and only driven it several times a week for short distances except for a ~ once-a-month round trip to Austin of ~170 to ~180 miles. So, my truck is effectively in storage most of the time. I also have quite a few Li-ion battery-powered devices that have lasted a decade or more effectively stored at ~50% SOC (usually kept between ~40% to 60% SOC) that I only use occasionally. Where SOH measures are available, they're all in the 92% to 97% SOH range. Especially in a hot climate, keeping a Li-ion battery below 80% SOC on average is more conducive to retaining its capacity long-term. If you need the capacity, by all means, make the fullest use of your battery. I plan on keeping my truck for a LONG time and don't want the double whammy of usage and cold weather reduced capacity 10 or 15 years down the road. We've inherited the "fill'er-up" syndrome from ICE vehicles, where a trip to the gas station is time out of your day. With charging at home, you can always keep your vehicle at the level that works for you on a daily basis, no sweat.Straight out of Lightning manual, page 197 of version 1.1, (emphasis added):The only real difference between using and storing your vehicle is the need for a "full tank" on a daily basis and the impracticality of maneuvering to a 50% SOC, changing your charger settings, etc., if you're going to be driving the truck again in a day or two. But if you don't need a "full tank," keeping your truck "in storage" as much as possible is going to be better, as Ford describes in the truck's own manual...
One thing to watch for when using lower than normal charging voltages is the voltage at which your BMS starts to balance the cells.
Nothing will break as if one or more cells rise up to the cell voltage / cell voltage difference at which the BMS starts balancing the BMS will still try to hold them down while the other cells rise but by limiting the overall battery voltage you can be hobbling the process so that the cells never become balanced. That can have the effect of top and tailing your battery's capacity. It won't be an overnight thing since well matched lithium cells shouldn't drift out of step much over time anyway but it will happen. A periodic, 6 or 12 monthly based upon what seems to be recommended for series connected lifepo4 batteries, higher voltage charge will allow the BMS to bring the cells into line again if this actually becomes a problem.
If it's a prebuilt battery rather than a DIY with your own BMS you'll probably not be able to get any good information about the circumstances in which the BMS balances the cells.
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