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03-09-2021, 06:31 PM #11
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Did you read my posting about "Cheap Lithium Batteries are Coming..."?
https://www.mygrandrv.com/forum/show...322#post341322
In that posting I included a spreadsheet showing all the cheaper Lithium (LiFePo4) batteries I could find, exclusive of the "Build it Yourself" batteries, including a breakdown of $ per Amp Hour. I compared Battle Born batteries to all the other batteries I found to give you an easy to compare pricing guide. I included several batteries from Amazon as well as several "Direct From China" batteries. I did not include the Lion batteries from Costco because they were not available for sale on the day I did the research.
Anyway, you managed to match the lowest priced LiFePo4 battery that I found available from a domestic source. If I were looking to purchase the battery you found, I would probably order the "same battery (essentially the same)" from Amazon, simply because they have a better return policy and free shipping.
**** Breaking News **** I just checked on Amazon and the price has been reduced by $50 !!!
That's right, a 200 Ah LIFePo4 battery for only $799 with Free Shipping !!!!
Outside of building your own battery from individual Chinese Cells, this is the best deal going on Domestically sourced LiFePo4 batteries.
PS: Buy it now, don't wait Stock may be limited.Last edited by SolarPoweredRV; 03-09-2021 at 06:34 PM.
David and Peggy
2019 Ford F350 Lariat, 6.7L Diesel, Dually, Long Bed
Running with 20k Reese Goosebox (Love It) and Ford Factory "Puck" system.
Stopping with 8,000 lb Disc Brakes and Titan Hydraulic over Electric Brakes system.
Powering all this fun with 1200 Watts of Solar, two Tesla, Model S, battery modules, 24 volt Victron Inverter.
2018 Solitude 310 GK
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03-09-2021, 06:37 PM #12
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So how concerned are you about the low temperature cut off ability and what do you personally do to handle that concern?
Its not that uncommon for it to get into the 30's?
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03-09-2021, 07:03 PM #13
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This is the hot tip......thanks.
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03-09-2021, 07:05 PM #14
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Where do you think I can find a battery box that can hold the dual size battery for the front hitch of my 2500rl rig?
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03-09-2021, 08:15 PM #15
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The concern with Lithium batteries is that they can not be charged if the internal temp is 32 degrees or below. You can still discharge them, but trying to charge them will ruin them.
The key lies with the BMS, does the BMS stop the battery from charging if it senses 32 degrees or below, if it does, then you are golden, if it does not, then you have a problem.
I don't know where you are from, but if you always disconnect your batteries while in storage you won't have a problem, because the problem is only if you try to charge the battery at, or below, 32 degrees. Also, if you don't have any way of charging your batteries during storage you won't have a problem.
The problem happens if you are camping and the batteries drop below 32 degrees and you don't turn off your Converter, if you are plugged into shore power. Additionally, if you are plugged into your Tow Vehicle and your batteries are below 32 degrees and you have not disabled the charge line from the Tow Vehicle you can have a problem.
Another issue is if you have a Solar panel(s) that can charge the battery anytime there is sunlight you will also have a problem.
So, if your camper does not have Solar, and you are not out camping in the cold weather, you won't have to worry about your batteries being damaged.
If you are camping in the cold weather, then you need to ensure that you are not charging the batteries if their Internal Temperature is at 32 degrees or below.
The Internal BMS should prevent the batteries from being charged if the internal temp is at or below 32 degrees, however not all BMS are programmed for this feature so you might want to check the comments on Amazon to see if someone has tested your battery.
For me, I would not be too concerned about cold weather charging, because, I would ensure my battery was fully charged before the cold weather hit, and I would turn off all methods I had to charge the batteries, I would then manually enable charging after I was sure the battery temp was above 32 degrees.David and Peggy
2019 Ford F350 Lariat, 6.7L Diesel, Dually, Long Bed
Running with 20k Reese Goosebox (Love It) and Ford Factory "Puck" system.
Stopping with 8,000 lb Disc Brakes and Titan Hydraulic over Electric Brakes system.
Powering all this fun with 1200 Watts of Solar, two Tesla, Model S, battery modules, 24 volt Victron Inverter.
2018 Solitude 310 GK
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03-09-2021, 08:46 PM #16
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It's wider than the battery rails, so you'd end up bolting a sufficiently large tool box to the trailer tongue. etrailer.com sells a variety of sizes. Personally, I'd probably just put it in the pass-through storage next to the 'universal docking station' where the battery disconnect is, for ease of wiring. You lose a little bit of storage, but that's not too critical for me. And you'd likely keep the battery above freezing at all times unless you left the trailer unheated.
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03-09-2021, 09:34 PM #17
I’m in agreement with your assessment of Li fly by night companies with unproven quality control.
He does have an alternative. Instead of the Lion Energy or any lithium we have Oasis Firefly Carbon Foam AGM. Not at all like any other AGM with lots of similar performance properties of Battleborn. You can draw the down to 20% easily and without penalizing cyles. Can get 3000 cycles. No special battery management system. No danger in an accident of a lithium fire which could be spectacular. ( First responders get special training when appearing at an accident with lithium battery powered cars) the cost is just north of $500. 6 year warranty
https://oceanplanetenergy.com/advanc...asis-group-31/Donna and Dave
Annapolis, Maryland
2021 Grand Design Imagine 2500RL / Dodge Ram Longhorn 2500 6.4 Hemi
350 W Newapower Solar: 3000 Victron Inverter/ Charger: Firefly Oasis carbon foam AGM
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03-09-2021, 09:44 PM #18
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You are thinking of lithium ion, not Lithium Iron Phosphate (LFP). The FAA has done fire tests and concluded that LFP batteries are dramatically less likely to become a fire hazard than lithium ion.
the cost is just north of $500.
6 year warranty
Also worth noting is that the carbon foam battery still has problems with relatively high self-discharge rates, and it has a 'memory' and will lose capacity over time until you draw it all the way down and fast charge it back to full. LFP batteries don't have this problem.
I think the carbon foam battery is a very interesting competitor to AGM, but it's overpriced by about 2x.
It's especially bad if you compare it to a budget LFP like Ampere Time, which are built pretty well but cost $500 for 100 Ah or $800 for 200 Ah, and still have all the usual LFP benefits.Current: 2021 Transcend 261BH, 2019 Ford F250 SRW SWB CC 6.2 - Picture
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03-17-2021, 02:24 PM #19
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I would check Dakota Lithium batteries. I think they have an 11 year warranty and are little bit cheaper than Battleborn. I have not used them on my RV, but know people who use them in their boats and swear by them. The USA only processes 1% of the world’s lithium and China process 50%, but at least try and buy something assembled and/or engineered in America.
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03-17-2021, 02:27 PM #20
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