Lithium battery protection

[#1BamaFan]

I'm going to swap out my lead acid for a 100ah lithium battery. I've been looking at SOK and AO Lithium batteries. I MAY do 2 100ah in parallel but I'm still undecided on that. I've read hours of threads and posts about the swap. But, there is one thing I don't understand. If the battery has a low temp charge protector, do I still need to worry about my solar panel trying to charge during freezing temps?

Would it be best after winterizing to just disconnect the battery? Also, can the battery be in storage in freezing conditions not hooked to any power source, and still be ok?

[Mark_303RLS]

I'm going to swap out my lead acid for a 100ah lithium battery. I've been looking at SOK and AO Lithium batteries. I MAY do 2 100ah in parallel but I'm still undecided on that. I've read hours of threads and posts about the swap. But, there is one thing I don't understand. If the battery has a low temp charge protector, do I still need to worry about my solar panel trying to charge during freezing temps?

Would it be best after winterizing to just disconnect the battery? Also, can the battery be in storage in freezing conditions not hooked to any power source, and still be ok?

I have the heated SOK 206AH Batteries. They have a low temperature cut off. They will not operate below a given temperature. So even if your panels are sending a charge the battery will not accept it. For long term storage below -6c it is recommended to bring them into a heated space.

[#1BamaFan]

Did you replace any other components in your system and do you have solar?

[Mark_303RLS]

Did you replace any other components in your system and do you have solar?

I am in the process of upgrading the whole system. My goal is to have the RV operate off the grid. To that end the system will include 900w of solar on the roof. 400w of portable ground solar. Three 206AH SOK batteries and a Multiplus II to power the RV and charge the batteries via a generator if required. The results of bench testing so far have me pretty excited about the setup. Should know better once it is installed later this spring.

[Indy Tim]

I have the heated SOK 206AH Batteries. They have a low temperature cut off. They will not operate below a given temperature. So even if your panels are sending a charge the battery will not accept it. For long term storage below -6c it is recommended to bring them into a heated space.

With the heaters, isn't any wattage sent to the battery diverted to the battery heaters to increase the battery to a temp where they can be charged?

[Riverbug]

Agree with other statements. Unless you're planning to travel North for the winter you won't have to worry about bringing in your batteries. Batteries that have low temp cutoff will not accept a charge so no problem there. Also, you don't have to be in a hurry to add other components. My 206AH SOK has been running just fine on the OEM converter/charger for 1.5 years. Including the previous RV that didn't have solar or lithium compatible charger. The new trailer has 12v fridge so included solar and lithium charger, but I'll be replacing with more solar, Victron inverter (and a host of other stuff), and in the process of building my own battery packs now. It all started with just replacing the original crappy lead acid battery with the SOK. You never know where it will lead you...

[Ynot4me2]

I'm going to swap out my lead acid for a 100ah lithium battery. I've been looking at SOK and AO Lithium batteries. I MAY do 2 100ah in parallel but I'm still undecided on that. I've read hours of threads and posts about the swap. But, there is one thing I don't understand. If the battery has a low temp charge protector, do I still need to worry about my solar panel trying to charge during freezing temps?

Would it be best after winterizing to just disconnect the battery? Also, can the battery be in storage in freezing conditions not hooked to any power source, and still be ok?

As other have previous said, if it has a low temp protector then it will prevent it from being charged. If you are entertaining already going to 2 x 100ah then I'd just go directly to 1 x 200ah. You'll save $, space and cabling. As for storing, if you in a place where you have to winterise the rig, then I would disconnect it and bring it inside. Also, make sure that the SOC is at 50 or 60% (I know BB says 100% but every other manufacturer says otherwise).

[pengle]

I have the heated SOK 206AH Batteries. They have a low temperature cut off. They will not operate below a given temperature. So even if your panels are sending a charge the battery will not accept it. For long term storage below -6c it is recommended to bring them into a heated space.

I think it's important to note that lithium batteries with a low temperature cut off will stop a charge from coming IN to the battery, but you can still get the voltage OUT of the battery (above 0*F). It will still power 12VDC devices. Additionally, just because the outside ambient temperature is below the cut off temperature does not mean that your space in your trailer is at that temperature. My furnace tends to keep my storage area "much" warmer than the ambient temperature.