pianotuna
Regina, SK, Canada
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stir I've provided the link to proper li management many times.
ScottG nice includes not using them at -34 F. I can't change the climate where I live.
I think Li are wonderful when they are suited to the climate.
* This post was
edited 11/01/23 06:01pm by pianotuna *
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.
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ScottG
Bothell Wa.
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Joined: 02/25/2005
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pianotuna wrote:
ScottG nice includes not using them at -34 F. I can't change the climate where I live.
I think Li are wonderful when they are suited to the climate.
Exactly - the right tool for the job.
I'm lucky here in W. Washington in that we never see those kinds of temps. Plus, mine will be inside the RV where it never drops below freezing even during storage.
Of course, there's always heated Lipo's for those in marginal area's (not your case).
Scott
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dedmiston
Coast to Coast
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StirCrazy - Please feel free to disagree with pianotuna, but you must disagree without being disagreeable. Keep it kind and respectful please.
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pianotuna
Regina, SK, Canada
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Stir, the 875 amp-hours were brand new flooded jars. When they died I realized I didn't much enjoy laying in the snow to top them up. Li back then were an arm and a leg and your first born son. When I found out the temperature limitations I looked for an alternative chemistry. I found Lithium Titinate--but they were totally beyond my budget (about 4 times the cost of Battle born).
I live on a limited budget. I decided to try the telcom jars, which, similar to LiFePo4 have a higher voltage. (not as high as li, though).
I apologize if I misinterpreted your bms situation. It appear to me that you planned on not having one in the new bank.
* This post was
edited 11/02/23 09:31am by pianotuna *
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time2roll
Southern California
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Cells look fine. JBD is great. Enjoy the new found freedom with lithium.
I recommend an active balancer over doing an initial parallel top balance.
I have 16 similar grade B cells and they work perfectly. Although I would have preferred your terminals if they were available at the time.
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StirCrazy
Kamloops, BC, Canada
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Joined: 07/16/2003
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pianotuna wrote:stir I've provided the link to proper li management many times.
ScottG nice includes not using them at -34 F. I can't change the climate where I live.
I think Li are wonderful when they are suited to the climate.
no, a lot of the stuff you have posted is sales propaganda which is from a company that gets their main sales from different types of batteries, everything I post is from the manufacture of the actual cells. the new generation of cells I have are usable to -35C for discharge so if you're willing to move them to a conditioned space there is no reason you couldn't use them.
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StirCrazy
Kamloops, BC, Canada
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pianotuna wrote:Stir, the 875 amp-hours were brand new flooded jars. When they died I realized I didn't much laying in the snow to top them up. Li back then were an arm and a leg and your first born son. When I found out the temperature limitations I looked for an alternative chemistry. I found Lithium Titinate--but they were totally beyond my budget (about 4 times the cost of Battle born).
I live on a limited budget. I decided to try the telcom jars, which, similar to LiFePo4 have a higher voltage. (not as high as li, though).
I apologize if I misinterpreted your bms situation. It appear to me that you planned on not having one in the new bank.
no that was just to clear up the misconception that you need a BMS, frankly I think you would be silly to run without one as it takes all the work away from you, but in my situation with almost 10X the daily capacity I use I could very easily get away without one. but no, I already have a JBD BMS... but now I have found a new one that I may just order has it has 2 amps active balancing built in instead of the .1A passive balancing I have in the JBD
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StirCrazy
Kamloops, BC, Canada
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time2roll wrote:Cells look fine. JBD is great. Enjoy the new found freedom with lithium.
I recommend an active balancer over doing an initial parallel top balance.
I have 16 similar grade B cells and they work perfectly. Although I would have preferred your terminals if they were available at the time.
The store shipped a new cell to replace that damaged one. I have had a 280AH setup in the camper for almost two years now, so not new found freedom, just the start of converting the 5th wheel to LFP also. and the terminals are the major reason I went with these ones, plus a US supplier so more reliability.
I am probably going to initially balance them manually when I do my first could capacity tests, but I am also thinking of getting a different brand BMS, JBD is good, but JK is killing it with some of their new one. They have a 200amp 4S with 2amp active balancing. The best thing is it is 4 to 8S so if I wanted to add another 4 cells later I could. here is a link to it (not where I will buy it from just the first link to come up JK BMS
Steve
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pianotuna
Regina, SK, Canada
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stir,
Do you have a link to these -35 F cells?
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StirCrazy
Kamloops, BC, Canada
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pianotuna wrote:stir,
Do you have a link to these -35 F cells?
here is the Data sheet for my cells.
when you want real info, you go by the data sheet not the sales info from middlemen. I do have to find out what they define pulse discharge as. At -35 you can only pulse discharge at 0.8C which for me to start my furnace and warm up the cells is fine as I would only draw 0.01C, but for continuous discharge you must be at -30 or warmer and you can draw 0.25C continuous.
I guess they define pulse as a 30 second blast, so I think if I ever planed on camping at -35, which I won't I have done once and nothing works good in the rv, even the propane is sluggish, but I would put heating mats on the battery with a 30 second on off timer to bring it up to -30 in the battery pack then I could have at it. but for the record camping in -30 isn't much fun either... I don't mind lows of -15 at night but beyond that it isn't camping its just surviving. haha
* This post was
edited 11/03/23 06:36am by StirCrazy *
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