mrdavvv
Solar Enthusiast
- Joined
- Jan 14, 2020
- Messages
- 404
Hello Forum!
So lately i have been trying different values for the charge setup on this unit. Im looking for a conservative charge profile, 10 - 90% SOC or maybe 20 to 80%. Im trying to check if my configuration its correct, and maybe others can share their own
This is my current configuration:
And just for reference, this is Will recomended values, altough i think they are for 0 - 100% SOC Charge:
So my questions:
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In a related subject, does anyone knows how the charge algorith for the LV2424 works?. My current assumption is:
And this:
So im not sure wich one its correct for the 2424's...
2.- Re-start of the Cycle: What SOC should the battery have so the charger starts again the cycle?, maybe when it gets lower than float?, in that case, it goes directly to bulk and then absorption?
3.- When the charger its finalized... the inverter starts drawing 2A from the batteries, and after a couple of hours it goes to 1A, if this behaviour normal?... does it happen to any of you?. Im expecting to see 0A both on input & output current, but for some reason seems to be drawing current all the time!, maybe my float voltage needs to be a little higher?
Thanks all for your help!
So lately i have been trying different values for the charge setup on this unit. Im looking for a conservative charge profile, 10 - 90% SOC or maybe 20 to 80%. Im trying to check if my configuration its correct, and maybe others can share their own
This is my current configuration:
Charge Voltage | Float Voltage | Low Voltage CutOff | Full Charge CutOff |
---|---|---|---|
28.2V | 26.4V | 23.0V | Full / Automatic |
And just for reference, this is Will recomended values, altough i think they are for 0 - 100% SOC Charge:
Charge Voltage | Float Voltage | Low Voltage CutOff | Full Charge CutOff |
---|---|---|---|
28.8V | 27V | 21V | ? |
So my questions:
- Are my values correct?, any recomendations?.
- What would be the charge / cuto off voltage for 10 - 90% charge?
- What would be the same values for 20 - 80% charge?
- The battery stop charging configuration its currently in FULL Mode, how does this works?, how the inverter knows when the battery its full?.... maybe when it arrives to the charge voltage?, maybe when it pass a certain threshold of current consumption?... in this menu i can setup FULL / Any voltage, what would be better??:
-------------------------------------------------
In a related subject, does anyone knows how the charge algorith for the LV2424 works?. My current assumption is:
- Bulk Charge State: From discharged state up reaching the absortion predetermined voltage (28.2V in my case). - Constant Current Mode.
- Absorption Charge State: Once battery reach 28.2, it goes to constant voltage and the current starts decreasing. - Constant Voltage Mode
- Float Charge State: Once absorption its finished (Not sure how the inverter determines this), it goes to float.
- Recharge: When battery goes below float?
Do not have your inverter, i have the lv5048. With mine i have to set the inverter to user bat selection, then you can program bulk and float voltages. Then in menu 32 you can set absorbtion time. For the lv5048 the absorotion clock starts counting down is triggered once the battery voltage get to be higher then the float voltage. So if you set bulk at say 27.7v and a float voltage of 26.7 and if you have menu 32, a safe absorbtion time could be set to 2 hours to start. Watch the voltages and make sure non of the cells go over 3.65v during absorbtion.
@Mtour
@Mtour
And this:
Event: Transition from CV (Absorption) to CV (Float) = When charge current reaches threshold, usually around C/100 Amps e.g. 1A for a 100AH battery.
@tictag
@tictag
So im not sure wich one its correct for the 2424's...
2.- Re-start of the Cycle: What SOC should the battery have so the charger starts again the cycle?, maybe when it gets lower than float?, in that case, it goes directly to bulk and then absorption?
3.- When the charger its finalized... the inverter starts drawing 2A from the batteries, and after a couple of hours it goes to 1A, if this behaviour normal?... does it happen to any of you?. Im expecting to see 0A both on input & output current, but for some reason seems to be drawing current all the time!, maybe my float voltage needs to be a little higher?
Thanks all for your help!
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