Recent content by markmm

jim's handy drawings that helped me https://www.dropbox.com/s/lef2qj30msjx29q/2.jpg?dl=0 https://www.dropbox.com/s/k5ua4afhdti2gmo/1.jpg?dl=0

hey Smithmal, I saw e-beach's post and he is prob right abt starting a new thread, but mainly bc I have exhausted my knowledge and the other dudes on the board would know more and help you better than I could, for sure. I did mine by hook or by crook and it works but there may be a better way...

hey smithmal, "I'm assuming since you bought 38120 batteries from them they ship to the US." >>>>yep, from china, ~2-3 weeks to get here (ga) "In terms of quality, were you ever able to confirm that GWL's stated capacity of these batteries (8Ah) before adding them to your battery array and if...

pretty sure I ordered most of mine from here: headway 38120S 10Ah LiFePO4 cell EV Components http://evcomponents.com/

what is correct full charge of a lifepo4 12V40ah cell GWL/Power Lithium Battery 12V/90Ah http://www.ev-power.eu/LiFeYPO4-batteries-12V-1-1/Lithium-Battery-12V-90Ah-WB-LP12V90AH.html?cur=1 LP = 12V Battery block LFP = 3,2V Cell (4 x 3,2= 12,8V) needs BMS (Battery Management System) for...

hey smithmal, I am just barely literate in this battery stuff but basically it worked fine and is still working, though it seems not to hold as much of a charge are originally, like before maybe 13.7 max or something and now right at 12.9. I did *not* add a BDS thing to it and that might be...

The charger I'm using

Thanks fechter. I appreciate your help very much. The battery pack is now reading like 13.4 so that is a little better and the charger says "fuel" is like 80%. The smart charger I am using has all these crazy settings but i am using of course is the LiFe and in there it says it ends at 14.4. But...

Status update: - refresher, this is a 16 cell headway lifepo4 battery pack, for powering a boat trolling motor and a fishfinder/ first charge with a charger, and now attached to 50W solar panel - worked on it first test, but only for about 2 hours, however that was wide open on the 12 volt...

thanks teklektik, not sure I understand it all. I am in the process of testing as fechter wisely recommended. I am not sure how to add a bms to my setup (pictures above), and have heard I do not need one and heard that I do. I was hoping/thinking that my solar charge controller (its an mppt...

ok, thanks fechter, and sorry to misspell your name before. and thanks everyone who replied so far. very helpful. when I get a second I am going to do these test and will report back. thanks again.

thanks all. also, so that is to say that when I am done charging the battery pack of 16 cells should show a 'full charge' reading on a multimeter of 14.4 volts? or do I need to set the charger to a setting that is 14.4 volts, or both. I guess what I am asking is, when and if it is done, the...

thanks fecher, this is very helpful and down on my level, which is what I need! 1) first I will try my charger set at 14.4v and see what happens. 2) then, if no change, I will test the 4 groups of the 4 cells. would this way I have diagrammed (picture after this post) be a good/safe/accurate...