LiFePO4 Converter Change?
I just want to switch from lead acid to lithium, not upgrade wires and everything else. Finding a new replacement board for my WF-8955PEC seems to be complicated. Straight 14.6V continuous boost singl...
Forum Discussion
time2roll wrote:3 tons wrote:I would not want to float an LFP above 13.4 volts. 13.2 - 13.3 is better. I don't know anyone that recommends holding LFP long term at 100% charged.
snip.... the charger reverts back to and holds at 13.6v…Charger stays at 13.6v to again repeat the 14.6v charging cycle in 8 days, or presumably triggered upon reaching a voltage somewhat lower than 13.6v…
14.6 is also higher than necessary and is more likely to cause a fault in some lower cost brands from CN that many look at.
This generally gives the standard PD or the PowerMax with adjustable voltage an advantage. Both drop to 13.2 volts for long term.
That is my opinion. Good luck to the OP.
I am not sure I agree with 8 days being considered "Long Term" , and every cell I have looked at uses the 14.6 as the recommended voltage for charging to 100%. I think the 13.6 has come about, as after a rest period off the charge that is considered a 100% resting voltage for the purpose of capacity checking, and like you said should be a max.
when I am camping I set the voltages for 13.3 which during the day will charge back up to 90% and hold so I don't use the two stage at that point but once a week I do use the profile that will charge to 13.9, hold for 1 hour as My BMS will start equalizing at 13.6V. I then have it drop to 13.3. I do have to change back to the normal one in the app but its easy.
as far as a two stage converter..
I don't know if I even need a dual stage converter I think because of my ability to bluetooth into my battery and set charge limits, discharge limits and charge start limits I could just plug it into a normal single stage charger, but I would have to test that, or maybe someone here has and can let us know. right now, since I installed my LFP batteries I don't plug it in at home.. just the solar is hooked up as I don't have a LFP compatible converter... well, it was supposed to be, but it is old stock they set me which doesn't have that function. I'll have to try messing around with that and do some testing... once I get a converter.
