The charge curve of LiFeP04 is very steep at the top (and bottom). This is definitely a calibration issue. My guess would be the unit when calibrated more smoothly ramps up the percentage when the cell voltage passes 3.45V by having the SOC already reading 98% by that point but because the calibration is a little off it might be lagging behind and when the voltage starts to rapidly rise from 3.55 to 3.65 it’s saying “oh shit I’m off!” And is just throwing percentage points on to the SOC reading. When I charge individual cells the time spent between 3.20 and 3.30 can be two hours and the time between 3.55 and 3.65 is like a minute just to give you a reference for how fast it goes up. *big assumptions are being made here about Ecoflows charging profile. They might not go all the way up just like they almost certainly don’t let you go down to 2.5V
Mine did this too. I called customer service and they told me to charge it to 100%, then turn the unit off for 1-2 hours, then turn it back on. I have a video on it if you want to see.
I would like to check that out. That's a little different than the advice they gave me. (Didn't tell me to turn it off once 100% and wait a couple hours). Interesting to see if that helps.
@@jaysonstebbins2539 it helped, but seems like it needs to be done periodically to maintain decent calibration. It's been a month now and I should do it again.
@DIYnerdman if the unit runs full time I would suggest probably making it your monthly maintenance thing with dusting it off. Good to hear! The BMS just sees ah going in and out and sees voltage. It doesn't quite know the exact level of charge unless it full or drained. I have 300ah of gel in my shed with a 500 amp shunt and I too have to do this once a month or two. I'll sometimes have to fully charge and tell it what full is. If you get alot of hard draws then sometimes it actually pull more from the battery chemically wise then what the BMS actually reports. It's like filling a glass of soda fast. Just use that anology both ways for charging and discharging.
Interesting info, do you guys think that we'll have to keep doing this with our Delta Pros? Isn't there a way to just let it run and not care and just enjoy the off grid life careless?
My unit has been doing something similar. State of charge had been drifting for a while, and recently while discharging the unit it started smoking and partially broke... Am currently in the process of sending it in for an RMA with EcoFlow. Specifically the MPPT/DC converter board broke.
Hello... try a reset. Un plug from everything. Turn the unit on then hold the power button to turn it off. Wait a a few seconds and turn it back on but don't just push the button. Hold it down till it beeps. Your battery % should go up or down. Then do a energy drain to 10-15 % . Then charge it back up. The reset is just pushing and Holding power button until It beeps providing confirmation of a reset.
when you power the unit off, keep holding the power button for 20 seconds then release wait 10 to 15 seconds then turn back on. then you should see a change
@@crzyscottech2724 this tends to help me much more, doing 3 charges & discharges does not even calibrate the battery for me anymore, but reseting is the only thing that works and it's instant
The charge curve of LiFeP04 is very steep at the top (and bottom). This is definitely a calibration issue. My guess would be the unit when calibrated more smoothly ramps up the percentage when the cell voltage passes 3.45V by having the SOC already reading 98% by that point but because the calibration is a little off it might be lagging behind and when the voltage starts to rapidly rise from 3.55 to 3.65 it’s saying “oh shit I’m off!” And is just throwing percentage points on to the SOC reading. When I charge individual cells the time spent between 3.20 and 3.30 can be two hours and the time between 3.55 and 3.65 is like a minute just to give you a reference for how fast it goes up.
*big assumptions are being made here about Ecoflows charging profile. They might not go all the way up just like they almost certainly don’t let you go down to 2.5V
Mine did this too. I called customer service and they told me to charge it to 100%, then turn the unit off for 1-2 hours, then turn it back on. I have a video on it if you want to see.
I would like to check that out. That's a little different than the advice they gave me. (Didn't tell me to turn it off once 100% and wait a couple hours). Interesting to see if that helps.
@@DIYnerdman hey did this work for you?
@@jaysonstebbins2539 it helped, but seems like it needs to be done periodically to maintain decent calibration. It's been a month now and I should do it again.
@DIYnerdman if the unit runs full time I would suggest probably making it your monthly maintenance thing with dusting it off. Good to hear! The BMS just sees ah going in and out and sees voltage. It doesn't quite know the exact level of charge unless it full or drained. I have 300ah of gel in my shed with a 500 amp shunt and I too have to do this once a month or two. I'll sometimes have to fully charge and tell it what full is. If you get alot of hard draws then sometimes it actually pull more from the battery chemically wise then what the BMS actually reports. It's like filling a glass of soda fast. Just use that anology both ways for charging and discharging.
Interesting info, do you guys think that we'll have to keep doing this with our Delta Pros? Isn't there a way to just let it run and not care and just enjoy the off grid life careless?
My unit has been doing something similar. State of charge had been drifting for a while, and recently while discharging the unit it started smoking and partially broke... Am currently in the process of sending it in for an RMA with EcoFlow. Specifically the MPPT/DC converter board broke.
Hello... try a reset. Un plug from everything. Turn the unit on then hold the power button to turn it off. Wait a a few seconds and turn it back on but don't just push the button. Hold it down till it beeps. Your battery % should go up or down. Then do a energy drain to 10-15 % . Then charge it back up. The reset is just pushing and Holding power button until It beeps providing confirmation of a reset.
when you power the unit off, keep holding the power button for 20 seconds then release wait 10 to 15 seconds then turn back on. then you should see a change
@@crzyscottech2724 this tends to help me much more, doing 3 charges & discharges does not even calibrate the battery for me anymore, but reseting is the only thing that works and it's instant