LiFePo4 vs Lead Acid...Some points of interest.

Jayco creek said: With the price getting so low for Lifepo4,I can't see a reason not to switch when there about the price of a quality lead acid...JMHO,.. So what is the current price comparison?

Jaycocreek, throw a solar panel or two on the roof and you won't need to run the generator very often, if at all. I don't even plug my TC into shore power at home anymore unless I've put a cover on it.

Not to beat a dead horse but I was curious how my new Lifepo4 120ah stacked up against my new last year Motobat 90ah for boondocking and less generator time..I finally got my Lifepo4 charger and was only down 50 amp hours but that is over what my 90 ah battery would be brought down to and I wanted a proper sync..

Charging the lead acid on the generator never did get if full running for 3 hours which is my sweat spot for gen use..I put 50 amp hours into the Lifepo4 today in about 2.5 hours to 100%/14.42V with a 20 amp charger..

It didn't start to taper until 98-99%





I let it run until the charger turned green then stopped charging..



So in answer to the question is a Lifepo4 better than a lead acid for my type of camping,the answer is yes..Agreed my use of a Lifepo4 is different than most but if I had a larger RV with two batteries instead of one,I would change them out to Lifepo4 if I had the money..I am not dumping on lead acid as my Motobat is a very good battery that made coffee(50+ amps) several times of an ancient 1200 watt inverter..

With the price getting so low for Lifepo4,I can't see a reason not to switch when there about the price of a quality lead acid...JMHO

Hey Steve, where the heck were you in the beginning Sir :), these last two ‘engaged in reality’ post of your’s might’ve saved us nearly 9 pages of #%@&#*$% !!

3 tons

"and this is different from a normal battery how?"

You didn't even read where I said, "It is the same with FLAs", and you are spoiling for a fight? Too early in the morning.

IMO Steve is taking a sensible approach , doing his math, etc, to see how he can run his TC better with LFPs than he can now with FLAs.

EDIT--Ok, the OP wants me out of this thread. Done! No more posts to this thread. He can block me to cull my posts but that will not remove any quotes in others' posts. He is also blocked (for the second- and last- time)

BFL13 wrote:


Weekend warrior could plan to use 0-100s with a smaller bank in AH, since he knows he will never use so many cycles, but he needs to equip for the needed C rate (minus 10 amps very time the furnace comes on during the recharge, adding to gen time, same as with FLAs)

Lots of things to figure, but IMO it would be good to have some camping off-grid time to know what you want your LFPs to do. Then do the math and build your system. It is the same with FLAs but the cost of getting your math wrong is not nearly so severe.

and this is different from a normal battery how? the only difference is that if you find you use 60-80 AH a day and you want to go for 3 days on average with LFP you would buy say 300 AH of battery, if your looking at FLA you would have to buy 480 AH of capacity. if you have solar pannels that add 40AH a day back in then you can cut that in half but I wouldnt as you might need that extra capacity if you hit a few days of rain. the batteries dont power things up different,or magicly do other tricks, they will supply power with in there operational capacity. for a flooded battery will it supply more than 50% yes but thats when you start decreasing the life of the battery. you don't have to worry about this with the LFP as the 3000 cycles is based of 100% discharge if you go with more capacity than you need with them and keep the discharge shallow, well maybe you can pass thoes off to your grandkids when you pass.

Steve

BFL13 wrote:

FWC wrote:
There is nothing here that is specific to lithium in any way. Unlike lead the 'operating SOC range' doesn't matter at all for lithium, you can bounce between 0% - 100%, 0% - 50%, 30 - 80%, all you need is the capacity.

Well several folks on here have said they plan to stay in mid-range. Itinerant1 has warned to stay between the knees and that he usually stays above 35%

Doesn't change anything. You pick your own SOC range and go from there.

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". I have a 40Amp converter in my camper right now, but as soonn as the LFP battery gets installed that is going up to a 90 amp. can I use 90 amps right now with 210 AH of GC batteries."

Don't forget that 90 amper is not PF corrected. A 2200w can run a 75 amper, but not a 90 amper. Can you carry along a Honda 3000? I so, no problem

the only section to stay away from is about 8% an less, not because its hard on the battery but your volage is dropping low and it will be harder on electronics.

Steve

BFL13 wrote:


The 100AH drop-ins are mostly G27 size but half the weight, no idea how big the DIY LFPs are.

the cells themselves for a 280AH battery are aproximatly 8X6X11 when put togeather then add say an inch for the box a little more in one direction for the BMS if you mount it inside the box.

Steve

For the record the SiO2 is a FLA variant (at least from what I’ve read...) - but trust that this misses my broader point regarding misinformation and gamesmanship entirely, of which you conspicuously do not deny??

3 tons, in the High NV Desert

I have never said I was an SiO2 "fan" (which is not an FLA either) . In fact I did say I might be the only RVer who has a use for one--look it up. I did say I am a "fan" of T-1275s though.

Bizarre!