LiFePo4 lithium battery charging questions
TL DR – I have some questions related to charging 12V LiFePo4 lithium batteries: *How to best use my solar to charge batteries? *Assuming I usually keep the lithium batteries at a partial SOC, what ...
Forum Discussion
jaycocreek wrote:3 tons wrote:
Had another good off-grid solar day today, with no meter monitoring, or intervention (100% passive)…
Stats:
200 a/hr LFP (actual load-tested at 215 a/hrs), 440w solar
Starting SOC @ 0700, 41% SOC
End of Day SOC @ 1900, 85% SOC
In approximate terms: A harvest recovery of about 44% of SOC (or 88 a/hrs) to arrive at 85% SOC…
3 tons
Interesting and always nice to see individual reports..I have been reluctant to mount solar on my roof,one because of water intrusion and the other,less solar output than aiming at the sun but also there is less fuss mounted..
Yesterday I did the same with one 100 watt portable solar panel and one 100ah LFP..Started at 51% and ended at 83% moving it two times..Plus 30AH roughly...
Not mounting solar on roof because of water intrusion is a lame excuse. Now saying I don't want them mounted on top and rather dance with them through out the day is different story and understandable.
If properly sealed with self leveling lap sealant there should never be a problem. I check my mounts occasionally to see if the lap sealant is starting to show weathering and 6 years now and still looking good in the western sunshine. That's 8 panels with 4 mounts each (32 mounting angled connections) with 5 screws each (160) going into the roof and 3 into the sides of panels. That's alot of possibilities of intrusion and never gave it a second thought.
Add an extra panel or 2 for flat mounting and now your equal to the daily dance without the hassle of wind blowing them over or having them grow legs and wonder off. ;)
But then I'm thinking as of fulltime user and enjoy the set it and forget approach.
