lithium question

Reisender wrote:

StirCrazy wrote:

Reisender wrote:

StirCrazy wrote:

S Davis wrote:


EVE LifeP04 cells are 10% to 90% for 3500 cycles, they should still have 80% capacity at that point. If so these should outlast me.

I think your missreading that a bit.. the industry standard is that the cycles they list are based off a 100% usage. they recomend 10-90% use range and that will extend your cycle life possibly up to 5000-7000 cycles, before you reach that 80% threshhold. then that 80% could be maintained for another 10 years or longer, if you treat them good.

Steve

Yep. This is why Hertz rent a car is buying 100,000 base models of an EV that uses LFP batteries. An expected battery lifetime of a million kilometres vice other chemistries. You can pretty much run LFP to zero frequently without as much worry of damage. 10 to 90 is much better though. The sacrifice is they are heavier and performance suffers a bit from the higher end models.

We are kicking around the idea of putting something like a battle born in our new little trailer that comes with 2 x 6 volt AGM’s. The cheap skate in me says live with the AGM’s and wait a few more years and the price delta to come down. Guess we’ll see.

haha AGM, up here, are more expensive that some of the new LFP on the market. and if you can hook up a four 6V battery sety up in your camper you can build your own batter setup with prismatic LFP cells which is so much cheeper. Battle born is way over priced now, there competators in the market and I believe they all agreeded on a price trying to hold on to the prices they set when they were only one of 3 range.

Steve

Yep, they are pricey. But am I right? You seem to have a good handle on this. The trailer comes from the factory with 2 x 6!volt AGMs. Would an LFP 31 not be giving up a bit as far as useable amp hours? They are in a heated area so that’s not an issue.

you could be depends on the exact size of the 6V agms, but we can assume say 180ah??? then a 100 AH LFP would give you the same amount aproximatly of usable , but in a pinch with the 6V you could go down to 20% which means in a emergency you would hve a 144AH capacity. I dont like to size LFP to use the "equivalant" usable AH I like to take advantage of the size and weight and get more AH in a lighter and smaller package. so for me I would realy go with two of thoes batteries, run them nice and take that cycle life through the roof and when you need it you will have a total of 200AH for use in an emergency, but you'll probably never buy another set of batteries in your life.

Steve