Just installed 100amp ht li time lithium battery, wondering about voltage?

My 230 AH Litime works flawlessly on my leveling jacks and slideout...is this a fluke?
The battery SHOULD handle this IF LiTime battery does not have FATAL BMS FLAW, that LiTime is dancing around.

Hoppy Frood's statement is correct and well put.
 
Some reasons for building a DIY battery. I built mine, talked to the warranty department and asked them if what I want to do was ok. They said sure. Don't be so stressed about it, have a beer. 🍺

I just know, that warranty department is great.
 
I'm getting the feeling that a number of us with purchased batteries will be learning about replacing BMS, if/when they fail and asking numerous questions from Butcher and @triplethreat We are really going to understand the downsides of a sealed battery.

Will Prowse has made comments like it is good to have multiple spare BMS.

"10-year battery" claim has nothing to do with BMS reliability and more about cycle testing LFP cells in ideal conditions over a short period of time and extrapolating cycles to days and years--totally unrelated to aging, actual use temperatures, in-rush currents, vibration, no storing at 0 or 100% SOC and continuing to pump juice into them, high humidity, unbalanced cells, ...

Some people likely will experience battery life span well over 10 years.
 
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No LiFePO4 batteries should be used in motor starting applications. Running other electric motors is just fine.
That seems extreme. How would a person with a generator, as in a toyhauler, presume to start his generator? Surely you wouldn't be expected to have a lead acid battery simply for starting the generator?
 
No LiFePO4 batteries should be used in motor starting applications. Running other electric motors is just fine.
It all depends on what the battery is capable of doing....and mine is MORE than capable of starting the 5500W Onan generator, I've done it many times and zero issues.
 
Out of the possibly 60-80 LiTime batteries these are the only products for starting, that I could find:

LiTime has a "20Ah 800 CCA Marine starting battery" but in FAQ is says:
  1. Verify that the CCA (Cold Cranking Amps) required by your fuel outboard motor is less than the battery's CCA value of 650A.
  • Also, 12V 140Ah Bluetooth Dual Purpose 1000 CCA Marine Battery
But I would ask LiTime if it is OK for generator starts because they only state "born for crank up fuel powered marine outboard motor". Don't assume based on good calculations, accurate in-rush current measurements and SHOULD WORK with LiTime...​
Sells at a much much higher price than their similar non- marine batteries.​
 
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I call bs, use my to run my ac regularly. zero issues. ac would kill it faster than jack or slide motors
 
My 230 AH Litime works flawlessly on my leveling jacks and slideout...is this a fluke?
no, I suspect the thread will degrade to battle born owners trying to sell why their battery's are better.....

I have used a variety of lithium battery's as an early adopter. I currently own weize, battle born, ampere time, Litime and several home builds. the only issue I have had with any of them has been with a daly bms I used on my home built packs. they failed and where not turning off the charge....replaced with overkill solar bms and are used daily in my work shop.

my current 800 amp hour setup cost just slightly more than one 100 amp battle born battery.

I am a solar gear addict...just can't help it
 
I call bs, use my to run my ac regularly. zero issues. ac would kill it faster than jack or slide motors
OK. It is good to hear about your broad range of success and is what I am hoping to be the case by many users. I would very much like to be wrong on all of this!

Are you also including in your BS comment that LiTime's is not saying their batteries are not to be used with: jacks, Lippert Ground Control 3.0, and not being OK for starting motors and that they rejected warranty that I brought up? It is good to question/doubt what others post, including me.

I know this stuff sounds pretty off the wall and why I have spent so much time trying to get to the bottom of it. I considered trying to get Will Prowse to contact LiTime to get a straight answer. It is one thing for a manufacture to say they do not have a problem, when they do and this situation, that LiTime saying that there are multiple problems using their batteries under these conditions!

This is why I very much encouraged users to contact LiTime directly and hear it from the horse's mouth. They have no phone support. Weekends you get a canned out of office response and will get back to you. During the week responses are overnight and with more challenging questions about 4 days, when they choose to respond.

On Nov 21 2024, Will Prowse wrote in #2 about a new LiTime BMS: "They used to run a third party BMS and I can't remember the name. It's in a past video. But now they make all of their BMS in-house. They actually have a really good BMS...."

@BoredWeasel When was your LiTime battery made?​
Added 1/11/2025 4:33 MST: As far as just one starting comment from LiTime site, look at last item in bullet list:
My approximate calculations for in-rush current for Lippert Ground Control based on 50A circuit breaker and even 5x in-rush (referenced article in previous post) 50 x 5=250A. This likely is for much much less than a second, should indicate the 100Ah w 280Ah for full 5s battery rating could easily take this high estimate. But LiTime says NO.

As Hoppy Frood correctly stated in post #20 and after my initial post:
From what I've been reading, it isn't that the LiTime lithium batteries CAN'T do it, but LiTime says they SHOULDN'T be used that way, and could void the warranty.
 
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Battleborn has no problem with using their batteries to start onboard generators.
Well, I was actually thinking of bigger motors, but lifepo4 chemistry just isn't as good as FLA batteries for starting applications was the point I was trying to make. They just can't pump out the amps like an FLA. So if starting a motor is it's primary use, lifepo4 is not the best choice.
I think BB want a soft start kind of arrangement for starting gennies?
 
Just as a reference for "generator starting"....my Onan 5500W generator will pull between 105 and 110 amps on startup. If the temperatures are cold, say in the 30s of so, that current value will increase a bit. It's still not an issue though for the DIY 302AH LFP battery I built and am using a DALY 200A BMS on. The limiting factor in my case, is the BMS, not the battery, but then again, I don't have or expect to have an inverter for the trailer.
 
It is really positive to see data and specific product-based information in an attempt to solve issues!

Does anyone have in-rush current measurements for some generator? Could Onan 5500W be pulling 105A*4 factor=220A during start-up, which would sound reasonable for 200A continuous BMS for long life? (with no inverter or other high load running at the same time)

At this point, I would like to see any in-rush current measurements on products that have been discussed here. My clamp meter and most cannot measure in-rush.
 
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Battle Born has a 30 second rating (no number on short surge) that LiTime does not (at least on two batteries that I looked at)

Battle Born 100Ah
  • 100 Amps Continuous
  • 200 Amps Surge for 30 Seconds
  • ½ Second Surge for Larger Loads
LiTime 100Ah Group 24 BT
  • Max. Continuous 100A
  • Max. Discharge Current 1 Second:500A
 
I call bs, use my to run my ac regularly. zero issues. ac would kill it faster than jack or slide motors
Do you have in-rush data on your A/C ? I may well be wrong but I assumed it to be less than the load on motors that are used in front jacks used on heavy trailers, or motors used to operate large slides.
 
Do you have in-rush data on your A/C ? I may well be wrong but I assumed it to be less than the load on motors that are used in front jacks used on heavy trailers, or motors used to operate large slides.
A typical 15K BTU Air Cond unit on start up can get into the low 50s for inrush of current, technically called LRA or Locked Rotor Amperage. The name plate data on mine showed 52 amp (LRA) if I'm remembering correctly.

And on a side note, having spent many, many years as an Electrician in an Industrial environment, I've seen large 480V and 2300V.....as well as 4160V motors pulling ~ 7 times the FLA or full load amperage. These are 3 phase motors seeing the *7 is NOT unusual in the least.
 
A typical 15K BTU Air Cond unit on start up can get into the low 50s for inrush of current, technically called LRA or Locked Rotor Amperage. The name plate data on mine showed 52 amp (LRA) if I'm remembering correctly.
How long would you guess that LRA amperage stayed high or tapered off until the normal run amperage kicked in?

On those high voltage motors you mentioned would you have to adjust cable size for the excessive LRA?
 
Peak in-rush starting current can indeed be higher than locked rotor amps (LRA). This happens because the peak in-rush current includes the LRA and also factors in additional current spikes that occur when the motor starts moving.

When an electric motor starts, the initial in-rush current is quite high as it overcomes inertia and the motor begins to accelerate. This in-rush current can momentarily exceed the LRA, especially if there are other transient conditions like voltage drops or spikes.

So, while LRA is a crucial part of the peak in-rush current, the total peak in-rush current can be greater due to these additional factors.

(Copilot)
 

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