โMay-04-2022 07:38 AM
โMay-15-2022 05:51 AM
BFL13 wrote:
StirCrazy if your claim is that the Solacity guy's info is just a sales pitch with wrong info about LFPs, it is your job to provide links to the correct, more credible, version of that information to prove your claim.
So let's see some graphs and tables you LFP guys have made from your measurements and indicate how you got those numbers so they can be peer reviewed here by guys who can see if your results are credible.
โMay-14-2022 01:36 PM
โMay-14-2022 01:12 PM
โMay-14-2022 01:02 PM
โMay-14-2022 12:34 PM
3 tons wrote:
Not to be naggy, but (since SiO2โs have already been mentionedโฆ), I wonder if BFL may have done some similar extensive โnuts & boltsโ bench-top vetting of his SiO2 (with BFL, highly likely!), and if so, perhaps he might be willing to share his findings with us??โฆNothing wrong with asking I hope, and may serve well to refute a few SiO2 misnomersโฆ.Just a random thoughtโฆ
3 tons
โMay-14-2022 11:47 AM
โMay-14-2022 11:01 AM
โMay-14-2022 10:42 AM
โMay-14-2022 10:20 AM
Itinerant1 wrote:
That's because I'm living off my system and don't have the time to be a weekend worrior scientist making graphs, there is recorded data that time after time shows the same thing after 6 years of everyday use and many cycles in whatever SOC using high draw item for long periods. It works what I'm doing.
I find these threads amusing when everyone is bringing in different beliefs from different websites or blogs or sales page's.
I know one thing for sure, right or wrong, which I believe is good enough for "my" prupose of living off of solar/ lfp batteries with solar being the main charging source. 14.1v absorb 10 minutes tops but 6 minutes is usally when it switches to flaot at 13.6v. I have constant draws of 2ah from inverter (never turned off) and a humidifier 7ah on 24/7, total of 9ah always drawing then add in all the other comforts of life. I donโt scimp on power, some might even say wasteful but it's there to waste without worry. ๐
โMay-14-2022 10:10 AM
โMay-14-2022 10:02 AM
โMay-14-2022 09:46 AM
BFL13 wrote:
StirCrazy if your claim is that the Solacity guy's info is just a sales pitch with wrong info about LFPs, it is your job to provide links to the correct, more credible, version of that information to prove your claim.
FWIW, I don't read it as a sales pitch, and I am one who got all kinds of abuse from you LFP guys on here last year or so for my complaints about LFP sales pitches having bogus info.
I am still getting abuse from 3-tons. ๐ Meanwhile he just used the Solacity guy as a reference in a recent post in this thread (13 May at 0732), and then when after that, I used the Solacity guy as a ref, he said that guy is not to be believed! Makes you laugh.
When I posted test results of my various field tests of various RV equipments to show what they did, I had to explain how I measured things to indicate how credible those results were.
It is no good making arm- wavy claims about LFP performance without any graphs , tables, and especially the whole scenario for how those measurements were made.
EG, if I had LFPs I would already have run some cycles and made graphs to see what really happens at various charging rates same as I did years ago to make my ugly graph using FLAs. Barre's book on 12v taught me how to do that.
So let's see some graphs and tables you LFP guys have made from your measurements and indicate how you got those numbers so they can be peer reviewed here by guys who can see if your results are credible.
itinerant1 has posted many tables of how his system performs, but they don't show graphs of charging profiles at various rates with times, which the Solacity guy claims to have seen but did not show.
โMay-14-2022 09:28 AM
StirCrazy wrote:time2roll wrote:pianotuna wrote:Why would I need 9,000 amps, or even 4,000 for that matter??
Stir find me an Li battery that provide 9C for 5 seconds, 4C continuous, and be charged at -40. You may find that is unobtainable.
As to size, I have room for 7 Group 31, so that is not an issue.
If my battery actually drops to even -20 my energy and heating systems have failed to the point I am already rolling out. I mean propane does not even vaporize at -40. I would have to assume utility power is available at these temperatures(no battery required). Temps at -40 is an expedition vehicle and preparation is far beyond virtually all RVs. No reason to proclaim this as an ordinary criteria for an RV on this forum. Better suited to an expedition vehicle forum.
https://www.globalxvehicles.com/uxv-max.html
dont want to go there, I went there and searched SiO2 and here is a quote from the first post that came up .
"With the exception of cold weather charging, the specs on these are almost identical to any other flavor of lead acid battery. They are not really comparable to lithium with regard to cycle life, energy density, recharge rate etc. There do appear to be some folks shilling these on some RV themed sited that are making some very unrealistic claims about their performance. In the end, they are just extra jellied gel-cells.
The low temperature charging 'issue' with lithium is a bit overstate and fairly easy to address if it does apply."
Steve
โMay-14-2022 09:04 AM
โMay-14-2022 08:09 AM
BFL13 wrote:time2roll wrote:BFL13 wrote:I respectfully disagree.
You need 14.x to get those ions moving better. Once there you can lower the voltage
Lower charging voltage than 14.6 needs more time so keep
Float voltage same as Bulk longer too till desired SOC is reached
I got that from the Solacity guy.