jaycocreek wrote:



It was a quote,not my personal opinion..Meaning,if you read the net enough and certain battery company specs and advice,yoy come up with some crazy stuff,including lifepo4..

I too have charged agm in all sorts of weather without any apparent damage,all lasting 5 years or so..But were talking inexpensive lifepo4 batteries...$300 for a true 100 amp hours(LFP) or $300 plus for 50-60 amp hours out of a quality agm like fullriver or ......CanBat batteries says not to charge below 0C(The above quote off there site)and ofcourse,most LFP say the same except there is a lot of chatter that charging LFP in the 20's at a low charge rate is okay..

I mean,who really knows..I have not seen anyone say they completely ruined a LFP by charging below 0C nor have I ever seen what CanBat battery claims of the lead acid batteries..

It's the internet,alot of opinions without a lot of actual trials for proof that I have seen....

Jayco..

3 tons wrote:

Stircrazy said, “if the battery comes with it and it actavates it totaly kills the battery.”…How so??

A quick check over at LifeBlue dispels this notion:

http://www.lifebluebattery.com/rv-boat-low-temperature-lithium-ion-batteries/100ah-d-lt-lithium-battery.html

Same thing at Renogy:

https://www.renogy.com/12v-200ah-lithium-iron-phosphate-battery-w-bluetooth/

3 tons

StirCrazy wrote:



doesn't dispell it at all. they are just heating the battery befor it ever gets to 0 degrees. what I was talking about was just cutting off charge sources at around 0 (sorry 32 for you guys) and allowing the battery to still be used untill say -20C (not sure what that is in F this early -17 or somthing like that) just running a load like a furnace at that temp should be enought to keep the internal temp of the battery above 0c which would allow charging again.

Steve

G-Dog wrote:

Nice backpeddle…
You wrote, in your own words. “I don’t think many people know…..” and then proceeded to post the article.
Made me think you believe the nonsense

Itinerant1 wrote:



There are dropin batteries out there that allow what I think you're asking, once below 0c/ 32f or what ever the assemblers call low temp charging cutoff BUT STILL ALLOW THE USE OF THE BATTERY TILL THE NEXT LOW TEMP DISCONNECT.

This is Battleborn's...
Battle Born Batteries protect themselves from charging in cold temperatures and won’t accept a charge once the internal cell temperature drops to 24°F. At this point they will continue to discharge even down to -4°F. At this temperature we recommend no longer pulling power to avoid damaging the batteries.

Lifeblue batteries allow the same.

Even my Elite GBS Batteries do the same. If any cell drops below 32f it will cut off charging but still allow the discharge use of the battery pack.