Lithium battery SoC storage...
At what SoC (State of Charge) should you store your Lithium batteries?
Hi Mike,
Regarding lithium batteries, my understanding is that they should NOT be stored at 100% charge, as doing so can damage them. The recommendations I've seen from manufacturers is that they should be discharged to ~50% before storage and preferably be kept between 20% and 50% SOC. Have you heard something different? - Brian N.
Hey Brian,
Every manufacturer I’ve talked to directly has recommended storing Lithium batteries at 100% SoC. But I have heard of the few manufacturers that recommend storage at 50% SoC.
Since there are dozens of Lithium Battery manufacturers out there, I’ll pull together a list of manufacturer SoC storage recommendations. But I need your help…
What brand Lithium batteries do you have in your RV?
Please leave your Lithium battery brands in the comments below, and I’ll contact each of them to create a master chart on recommended SoC storage. If you’ll help create the list I can create a SoC storage chart in a few weeks.
Let’s play safe out there… Mike
I have Vatrer 100ah LifePO batteries. (Amazon) I was unable to find any information regarding recommended SoC storage. I purchased these because the BMS uses a low temp charge protection. You may want to discuss why that's important for Lithium batteries. Would also like to understand how 100% SoC is calculated. My batteries voltage can vary quite a bit and still show 100% SoC. I've also had them charged to 14.4 volts and show below 50% SoC. These are measurements I'm getting from a Victron inverter and their app, via bluetooth connection.
I got this reply from Weize:
WEIZE
Hi, Thanks for your message. When long-time storage, the battery SOC should be at 30% ~ 50% , high-SOC storage will accelerate the battery capacity degradation. The battery needs to be charged and discharged every 6 months. Any other questions,please contact us again. Best Regards