They have both 36v, and 48v comes with charger, and dc to dc…
Amazing price.
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School me here. Those Trojan batteries are 225 amp hour and the lithium is 100. I know that the lead acid can’t be cycled as deeply as the lithium and are much slower to charge as well as weigh a lot more but just in terms of supplied capacity. How does 100 amp hrs beat 225. No arguing that the lithium isn’t better. Just want to understand why and also for the same money as the Lead Acid why not double up the lithium.
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You totally could double up the amp hours if you have the space for it.
But I think the idea of those lithiums is you’d go the same distance with that many as you would on the lead acid cells and weigh a whole lot less.
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Mwa, or put as much in it as possible, ad an inverter and you have a movable powerbank.
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There are a few factors here…
Lead acid batteries you can only take 1/2 of the amp hours of that of a Lithium battery, with a Lithium battery you have access to 100% of the amp hours…
Another consideration is the weight, if you are not carrying the weight of lead acid, one can go much father…
I have not done the math, but I am sure he will get some distance out with his setup… As mentioned before, there is room for more lithium if they need more…
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I have seen a video on youtube of a guy who uses an electric chain saw + inverter to saw up his wood for the winter.
All kinds of options with this…
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A * V = Watts.
The lithium batteries are more volts. in what appears to be the same size package.
The depth of discharge is 80% for LiFe batteries and no impact on battery life, and the output voltage is constant.
The depth of discharge to preserve LA batteries is around 50% and the voltage drops accordingly.
If you -really- take care of LA batteries which deteriorate every cycle you might get 1200 cycles. The LiFe batteries are in the 5k range and they don’t detiorate if you drain them completely so you don’t need the trickle charger.
At this point, I think LiFe batteries, cost roughly 2x what a LA battery is.
There are certain circumstances that you would want a LA battery like cold weather but usually golf carts are used in the snow. Some have heater to keep them warm.
Generally, most people are better off spending the extra money to get the longer life when they need energy storage. When they first came out like the big cabin cruiser boat people were driving the market even at 4x more expensive, they are safer in the cabin, hold more usable energy and a lot less of a problem. Most of those people just hired out the battery replacement and maintenance. Now they are good for 10+ years without even thinking about them.
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Yeah 80% discharge is better with lithium than 100 % battery will last far longer.
Another factor is internal resistance of the battery, lead acid batteries have a higher resistance so it takes more to charge them than Lithium batteries. Indeed cold is a factor, can’t charge lithium batteries when the batteries are cold else they will be destroyed.
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The LiFe batteries drop from 100% output to about zero at 80% depth of discharge, but it is okay to completely discharge them, it doesn’t hurt them.
The wear on LA batteries is proportional to how much charge they have used. The deeper the depth of discharge, the more wear and tear they encounter.
I don’t know if the LiFe batteries will be destroyed if you try to charge them when they wont take a charge or not. I haven’t ever heard that one before. But certainly the ions don’t move.
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One thing before changes to lfp starter battery is the c rate. LA is good for starting. Lfp I do 0,5 C load and not to much spikes.
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my setup or a batt chainsaw. No screamers just Zen in the woods.
Only just the battery died. LAcid, dont know what to. Scrapyard or time investing.
Much depends on the chemistry of the Lithum battery… But this chart compares length of life verses depth of discharge… This changed how much I pull from the battery for longer life…
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That only shows LiPO4 and NMC batteries. LiFe are a different chemistry.
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True, But the degredation of deeper cycles can be seen with lipo4…
Lithium titinate can go for far more cycles but the cost is higher…
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The LiPO batteries are probably the worst but they provide more current from a smaller package. They are in ebikes or drones/rc cars a lot.
Lithium titanium batteries can also charge faster.
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When I built my stationary, in the house, back up system a few years ago those Li batteries were quite a bit more pricey. It has 4 260 amp hour golf cart batteries hook up for 12 volts, so 520 amp hour capacity. Just set up to run the pumps and fan on my wood heater and the fridge. So far I have never needed it. I also have concerns about the risk of fire in the house. Having seen video of Tesla’s on fire. That’s some scary shit.Since then I have bought a couple portable power stations to equal 1600 wh’s that will recharge in an hour. I’d like to double that if and when I get the cash.
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The LiFe batteries don’t catch on fire. The Tesla batteries are NMC (nickel maganese cobalt with aluminum and lithium.) The electrolyte is what catches fire. It is basically an organic solvent. LiFe batteries use a different electrolyte.
4*(260ah *12v) is 12.48kwh of which you can really only use 6kw without deterioration. You basically need 2 of those 36v 100a batteries to get the same capacity.
Since golf cart batteries is just a size designation, and meaningless otherwise,
I might as well mention cold cranking amps is different then Amp hours of storage capacity. In fact i recently saw a battery that deliver 250 CCA, but the battery only had a capacity of 8ah. I think that is when I was looking up the LiFe lawn tractor battery
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Seems in-depth.
His next expands on consequences. And Why. Who is to blame.
Handling power; REAL Power deserves study, safety procedures set up. And then religiously followed.
Gasoline itself is biting-bitch-wicked especially in warm hot situations. “Take the can out of the vehicle and set on the ground before filling.” “Do not slide/sit back into the vehicle while filling.”
Lead acids can, and do blow up handling/charging enough of them. 1 on 5,000-10,000 with catch up with you.
S.U.
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Thanks Mr Steve. The first video I had seen, the second is new. Thanks. Good video. For a lot of people it is unclear what Lipo, Li-ion or LeFePo4 is. For me too but at least I know the risks. Only LFP overhere. To bad the car isnt but long range was important. My sun had an Lion cel exploded in his room. No joke. Just a single 18650.
Next step is a thermal camera to check batt connection now and then. Chemistry is save but still the risk of bad connections and high current.
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These ratings are not the same as the applications are not the same.
Both battery rating are full charge to depletion. However with the Lithium you can use 100% of that rating. Lead acid you can not.
A lead acid battery is best for application where the charge is maintained. LIke a car battery, you use it to start the engine then alternator comes on and replenishes the charge right away. The battery will last years used this way. Anything beyond this is hard cycling the battery, once you are bellow 12 volts you are hard cycling the battery, the lower the voltage you allow the battery to drop per charge cycle the more degradation of the cycle life.
When you use a Lead acid battery for this type of aplication that 225 amp hours is now cut to 1/3 as you will destroy that battery in a heart beat hard cycling with a full charger everyday. So its only really good for about 75 amp hours and not the full 225 amp hours. When a lead acid battery is concerned that is just its full capacity from full charge to depletion. But you can not do that to these batteries it will destroy them.
LifePo4 are in fact chaaper batteries than lead acid. That amp hours rating is not the same or even close to reality when used for this application.
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