noco10genus and litime battery fully charged percentage

i just hooked up my noco10 genus to my litime 12 volt 100amp battery i bought 2 of them i used my suoaki 4 amp ics4+ lion(said lifepoe4 in parenthesis) charger setting and it jus dint seem to work left it on all night never got below 1.8 amp charging at 14.2 but i checked itwith a multi meter which said it was charging at like 13.70 the noco is doing the right charge rate when i started 14.7 but has stopped after a couple of hours on 14.06 volts and the battery showing 13.56 it wont rise or charge past that my understanding is the battery needs to read 14.6 with the charger correct 13.56 is like 90 percent charge( i think) i need to run a capacity test to check them as they came in the other day.
what charge should a lifepoe4 show when its fully charged?

It sounds like your battery cells are unbalanced. Discharge the battery and charge back up for a few cycles at a lower voltage and/or a lower amperage. You need to give the BMS more time to balance the cells.

stormtracker78 said:

i just hooked up my noco10 genus to my litime 12 volt 100amp battery i bought 2 of them i used my suoaki 4 amp ics4+ lion(said lifepoe4 in parenthesis) charger setting and it jus dint seem to work left it on all night never got below 1.8 amp charging at 14.2 but i checked itwith a multi meter which said it was charging at like 13.70 the noco is doing the right charge rate when i started 14.7 but has stopped after a couple of hours on 14.06 volts and the battery showing 13.56 it wont rise or charge past that my understanding is the battery needs to read 14.6 with the charger correct 13.56 is like 90 percent charge( i think) i need to run a capacity test to check them as they came in the other day.
what charge should a lifepoe4 show when its fully charged?

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Interesting because I have the same charger and same battery and my noco only goes to 13.7 switches to slow green

No the battery does not have to get to 14.6 to full charge. Anything 14.0 to 14.4 is fine. Although the battery may need to be held for a bit at these lower voltages to get over 99%. BTW going to 100% is overrated with lithium and is a hang over from lead-acid that needed 100% to avoid sulfating and permanent loss of capacity.

Even the 13.70 will get full charge but may take an extended period as you saw with 1.8 amps continuing for a long time. Just keep going. The real issue to verify is if the battery entered self protect mode before 14.40 volts and stopped the charge. This may have happened at 14.06 volts.

time2roll said:

No the battery does not have to get to 14.6 to full charge. Anything 14.0 to 14.4 is fine. Although the battery may need to be held for a bit at these lower voltages to get over 99%. BTW going to 100% is overrated with lithium and is a hang over from lead-acid that needed 100% to avoid sulfating and permanent loss of capacity.

Even the 13.70 will get full charge but may take an extended period as you saw with 1.8 amps continuing for a long time. Just keep going. The real issue to verify is if the battery entered self protect mode before 14.40 volts and stopped the charge. This may have happened at 14.06 volts.

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Thanks for the info
I will have to watch hobotechs video again but doesn’t it BMS completely disconnect the battery from the terminals? When it goes into protection ?
But I could at least measure amperage out of the genius at this 13.7
With that said I do have another brand of battery 100ah lithium should see what it does.

Not sure if anyone has a litime or similar charger to chip in what voltage it stops at. I sent a ticket to both litime and noco see what they say

Yes amps will go full stop when protect mode is triggered. There is still voltage as discharge is allowed and the charger may still be pushing some voltage.

Most automatic chargers will drop to a lower float voltage fairly quick if the amps drop to zero.

When the Li-time hits about 14.1 or 14.2 volts, it starts the (rather wimpy) internal cell balancing, which I guess is resistive. I personally think the battery is at 99% here if the cells voltages are close to each other and question the worth of trying to get to exactly 3.6499 volts per cell for that extra 1%. That being said, if the battery is way out of wack internally, like 3.3, 3.3, 3.6, 3.6 and it is balancing, it might be worthwhile to hold it at 13.8 volts (the sum of that example) for a long period so the tiny internal balancing can bring down the 3.6 volt cells while letting the 3.3 volt cells climb up.

stormtracker78 said:

noco10 genus to my litime 12 volt 100amp battery

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This type of charger is not ideal for many lithiun low cost batteries . As discussed its most likely the battery has unbalanced cells cells.
BMS protection stops charge current due to cell overvolts, the Noco detects zero current and completes the charge process.
It's quite possible the battery is in a high state on charge. When charging with a low current compared to battery capacity, the battery can be considered almost fully charged way before the voltage exceeds 14.0 volts.

stormtracker78 said:

the battery showing 13.56

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That's a fully charged battery

When a charger is set up to charge to say 14.6 volts, that's the target voltage that the charger 'aims' for. Over most of the charge cycle the voltage on the battery terminals will be 13.5 volts +/- 0.1 volts.

A more ideal charger is where there are user settings for charge profile and a comprenhive indication of the charge process.
The Victron IP22/IP65/IP67 blue smart range of charger offers complete control of charging.

To help the balance process where cell inbalance is suspected, holding the charge voltage just below where protection takes place, (indicated by a sudden fall to zero in the charge current), for several hours, will help. This needs a charger with user settings or a power supply.

Another vote that these noco chargers, while pretty solid for sla, are not appropriate for lithium even if they claim to be.

They are as expensive as victron too. Rather have that blue dopamine that I know works for approx the same price.

The noco10 genius is 129 and a 17amp blue smart is 126-140 although the noco can be found on sale occasionally.

Being able to check the charge status from my couch while watching American pickers and drinking a leinikugel is the cherry on top.

Thank you for the information I appreciate the advice

I was chatting with stormtracker with his situation with litime and genius 10. He mentioned same voltage readings as myself and returned the genius and ordered a litime 20 amp charger. Which says 14.4-14.6 on the description but did not change the batteries 13.5-7readings.

Did some further checking and noco customer service says the voltage should be 14.4 14.6 I left the litime sit on the charger 14+ hours and when I returned it was 13.5 and no amps.
I disconnected the noco and reconnected and it did 1 amp, 3, 5, 8, 9.8 then shut off at 13.7 with no amps in a short 1-2 minutes duration.

So I dug up my friends other brand lithium 100ah battery and connected it. It started at 13.47 and did the same ramp up to 9.8 volts maybe 30-45 minutes. Checked back and it’s completed at 14.47

And as many of you mentioned and recommended the charge voltage from litime is 20 amps. The manual also says 13.33> is 100% SOC.

Again I appreciate the help should have researched more before noco. And learned that 13.5 is basically litimes 100% SOC even with a 14.6 litime charger.

Consider floating that litime at 13.60 for a week. Then try the noco again.
May need a low amp variable power supply.