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equalisation

Multiplus 2 equalisation voltage again :(

This has come up again, today I tried to do an equalization on my IPzS 930 48v battery bank and I can not get it to go over 60.5v. I need to get to 62v, I am starting to get at a bit of a loss with this, everything I have read about it leads me to believe the voltage should be able to go to 62.4v.
The only thing I can think of is that it may need higher than 25% current limit due to the battery size but not sure how I can do that.
Has anyone any ideas why this is happening and how I could get it sorted ?
In an ideal world the Multi would run the same charger software as the MPPT's.
Setup is 48v 930ah traction battery
Victron 48/8000/110
Fronius 8.2-1
250/100MPPT ve can
Smartshunt 500
Cerbo GX
Thanks for any help


scraggs asked
derrick thomas answered ·

1 Answer

Multiplus 2 48v equalisation voltage

Hi all
I have set up my absorption and float voltages on my Multiplus 2 48/8000/110, however it will not allow me to set the equalisation voltage and it tells me using the traction battery preset that the system can get to 68V, my battery supplier has said they should be taken to 62V.
Is there any other way to set the equalisation voltage, I know you can adjust it if it was an MPPT ?

scraggs asked
scraggs edited ·

3 Answers

Equalization Questions not Answered in the Manual

I read that once equalization begins, if not completed, it won't try again until the next scheduled time. Say it's cloudy and Absorption doesn't complete, will equalization keep trying every day until it begins the cycle? If I have a nice sunny day and I manually start equalization, does the interval count begin over again regardless of where it was in the count?

bill-walter asked

0 Answers

How to launch equalization on a PWM Pro controller ?

I'd like to refresh some old 12v batteries with an equalization, I bought the PWM Pro for this purpose, but I see no way to launch it as I can do with, for example my TriStar MPTT where I just have a button to press.
This is not an ad for the Tristar, I love Victron products....

The software does not seem to allow this either (at least it's not explained in the software manual). I have a raspberry with a RS485 interface if there's any open-source documentation on the PWM-Pro COM protocol.

dom-guardiola asked

0 Answers

Smartsolar equalisation and current from Smartshunt

Hello, I suggest to Victron to make a way that the equalization current of the smartsolar can be read by a smartshunt or a bmv via the VE smart network.



otherwise it is impossible to carry out a correct equalization phase if there are loads on the battery.


It is quite frustrating that the smartsolar can use the charging current of the smartshunt to terminate the tail current draw phase, and that it cannot do the same for the equalization phase.


for example if I set the equalization limit to 10% of the current of my smartsolar, it would be 3A (10% of 30A), but if I have 15A of loads on, the voltage will never increase because the charge controller cannot distinguish the current of the loads from that of the battery.


It would be very easy to do this since everything is already set up for the Ve Smart network.

Fra asked
Fra commented ·

1 Answer

MultiGrid 24/3000/70-50 firmware v497 issue

Hi there,

With the latest firware version, I'm having an issue when uploading a different VEconfigure profile. I was able to change the profile without a system outage. With the latest firmware (and the version before it which I used for a week or so), when I change profiles the power is off for a few seconds. This creates an issue with getting everything rebooted and connected again. Is there something I can do to stop this from happening or do I just need to revert back to an older firmware.


I bit of of backend info if you care for it or you're wondering why I need to change profiles:

I'm running a 1380AH 24 V flooded lead acid battery bank. I need to equilize every 20 days ideally. To meet the battery manufactures specification or an equalisation charge I need to change the charge voltages from the regular absorption voltage. So I can it so the multigrid think its in bulk or absorp, but the voltage is set to equilise. I haven't figured out another way to do this without changing profiles every 20 days; the built in equalize feature of the multigrid doesn't work with the requirements of our system.


Regards,

UYV.


upperyv asked
denzel answered ·

1 Answer

Getting the multiplus 3k 12v to equalize

I have read the manual and tried multiple times to execute the equalize process (below). So has the yard that did the install. I never get to step 4, the lights do not flash and then because the switch is still in the on position, the unit begins to charge.

Any advice on trouble shooting? Is there a way to do this through the app? I understand that one can do this through any GX unit, but I do not want more - trying to keep things simple :)

===================================

3.3.3 Activating equalisation or forced absorption

The MultiPlus can be put into both these states from the remote panel as well as with the front panel switch, provided that all switches (front, remote and panel) are set to “on” and no switches are set to “charger only”.

In order to put the MultiPlus in this state, the procedure below should be followed.

If the switch is not in the required position after following this procedure, it can be switched over quickly once. This will not change the charging state.

NOTE: Switching from “on” to “charger only” and back, as described below, must be done quickly. The switch must be toggled such that the intermediate position is 'skipped', as it were. If the switch remains in the “off” position even for a short time, the device may be turned off. In that case, the procedure must be restarted at step 1. A certain degree of familiarisation is required when using the front switch on the Compact in particular. When using the remote panel, this is less critical.

Procedure:

1. Check whether all switches (i.e. front switch, remote switch or remote panel switch if present) are in the “on” position.

2. Activating equalisation or forced absorption is only meaningful if the normal charging cycle is completed (charger is in 'Float').

3. To activate:
a. Switch rapidly from “on” to “charger only” and leave the switch in this position for ½ to 2 seconds.
b. Switch rapidly back from “charger only” to “on” and leave the switch in this position for ½ to 2 seconds.
c. Switch once more rapidly from “on” to “charger only” and leave the switch in this position.

4. On the MultiPlus (and, if connected, on the MultiControl panel) the three LEDs “Bulk”, “Absorption” and “Float” will now flash 5 times.

5. Subsequently, the LEDs “Bulk”, “Absorption” and “Float” will each light during 2 seconds.
a. If the switch is set to “on” while the “Bulk” LED lights, the charger will switch to equalisation.
b. If the switch is set to “on” while the “Absorption” LED lights, the charger will switch to forced absorption.
c. If the switch is set to “on” after the three LED sequence has finished, the charger will switch to “Float”.
d. If the switch is has not been moved, the MultiPlus will remain in ‘charger only’ mode and switch to “Float”.

jreadams6 asked
jreadams6 answered ·

1 Answer

Equalization not working

Multiplus inverter/charger 24/3000/70. I need to equalize Rolls 5000 24 V batteries. Multiplus says the batteries are floating. I start the generator manually, set the run time for 6 hours. From our CCGX I start the equalization process. The Multiplus shows that it is in the equalization process because the bulk and absorption LEDS are flashing alternately. The image shows the process starting at about 10.20. At about 12.45 the battery volts reaches absorption volts but instead of battery volts continuing to rise to about 30-31, eq volts, the charger switches to about 26.20, float volts. Specific gravity is still about 1.190.

Not sure what's going on. How can I get the eq to perform correctly?

[image]


william asked
huramentzefix edited ·

5 Answers

can't equalize with 100 /20 controller

My batteries are now 6 months old and I figured I'd try to equalize them.

But no joy. AGM batteries, 24v.

Voltage stays at 28.6v no matter what. If it spikes a little higher when a load comes off, it immediately corrects and brings it back to 28.6v. Plenty of power available from source, was running at about 60% most of the time.

My settings are:

absorb: 28.8v, float 27.6v, equalization 32.4v. equalization current percentage 8% and then I tried 20%. Same result.

It was on the default victron AGM settings, changed it to user default with the same settings as above.

Not sure what else to try.

cemdev asked
snoobler answered ·

1 Answer

Equalisation Using Advanced Setting for Multi/Quattro in CCGX

Now that we can remotely trigger an equalisation charge with the CCGX (Start Equalisation button to the Multi/Quattro menu. See Device List -> Multi or Quattro -> Advanced)

Can anyone confirm what the settings are for this equalisation? Does it prompt you to set a voltage, current, charging time etc. and does it / can it also autostart the generator for this purpose? If not I assume it does the 1 or 2 hour equalisation at absorption voltage. My concern with testing this would be if it used the settings for tubular plate traction batteries as indicated in VE Configure. Hence why I'm hoping for an account from someone who has tested it!

thomas asked
ddickov commented ·

5 Answers

Equalization Charge parameters way too low

I recently installed a 12v/3000 Multiplus. I love the features and I am able to remotely monitor and control from the Cerbo GX I installed. Testing the equalization function today and subsequent searching here I see by pressing the equalization charge from the GX Touch that the current into the battery is limited in equalization to 20% of the max (120 ^ .20 - 24 amps DC. I have a 1000 amp hour battery bank of tubular traction batteries. 24 amps will never push the voltage up high enough to reach equalization voltage. Am I missing anything here with the equalization charge functionality of the unit?

My thought on a workaround is to simply change the charging parameters when I want to do an equalization charge. Setting the absorption voltage at 16v and the absorption time at a fixed 4 hours.

Thanks in advance for any suggestions or input.


jeffryk asked
Alexandra edited ·

1 Answer

Equalisation voltage not reached

Hi. I have 2 parallel multi-pluses (firmware 159) charging a 48v battery. When I manually put them into equalisation mode using the panel on the master unit, the correct LEDs flash for equalisation. My Venus device confirms equalise mode, which it stays in for 1 hour as expected. But... during this time, the voltage reaches only 57.5v, less than my usual absorption voltage of 58.4v. Any ideas? My understanding is that the equalisation voltage is set, and should be 62v in my case. Thank you.

andyrlm asked
andyrlm commented ·

1 Answer

Battery equalisation

I am looking for help with battery equalisation. The house battery set up in my motorhome is 4 x 6v 550AH AGM batteries wired in series to provide 24v. I would like to install a battery equalisation system. Most of the information I have read talks about 2 x 12v batteries in series. Can anyone help with information regarding how many equalisers I need and how to connect them.

cchilcott asked
Mark answered ·

3 Answers

MPPT 100/20 Expert Equalization mode

I have a MPPT 100/20 SmartSolar controller. I am trying to get the equalization mode to last longer than 1 hour.


I have enabled expert mode, set the time to 8 hours and start an equalization but it gives me a note about 1 hour and only goes that long.


How do I get it to last for the time I specify? My battery manual calls for an 8 hour conditioning, not a 1 hour one.


[image]

ah64id asked
ah64id edited ·

1 Answer

Sulfation or stratification (flooded start battery?
I used classic cheap flooded starter batteries in solar light cyclic application (95 ah maintenance free but not vrla). 
I noticed this phenomenon: every month or 2 months of light daily cyclic use (DOD 15% and subsequent full recharge), the real capacity tends to decrease quite, Let's say 10% after 1 month and 20-30% after few months, even if it gives a false Open circuit voltage of 13.1 v. 
However, an equalization charge at 15.0 v for 1-2 hours, and consequent bubbling of the electrolyte, restores the correct full capacity for the next 1-2 months. The strange thing is that the equalization only works if I previously discharge the battery with at least 30-40% dod. While it is less effective with dods below 20%. 
What is the cause of this periodic behavior? 
I thought of slight sulfation or stratification of the electrolyte. But none of these things should happen, as the batteries are charged every day and they move and shaking with the motorhome. The problem happened at the same way with 3 batteries from 3 different brands and it seems to happen only to me. The charging and discharging parameters have always been the same: average dod 15% and complete daily recharge with absorption of 14.4v 1-2 hours and temperature compensation -18mV / C and floating 13.8v. I am afraid that the periodic equalizations will dry the electrolyte that cannot be refilled because they are free from maintenance, even if they are classic flooded. 
Using agm deep cycle batteries this phenomenon has never happened to me and the capacity remains constant over time for the years of use.

What is the cause?
Why does equalization work so much better with previous heavy discharge?

Fra asked
Fra answered ·

3 Answers

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