equalisation Image


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

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?


william asked
Kelly Armfield edited ·

4 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.


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?

francesco asked
francesco answered ·

3 Answers

Equalisation of Lead Acid with an ESS, problem

We have installed a grid connected ESS system earlier this summer for a customer using his lead acid flooded batteries that need a monthly Equalisation.

The customer has been unable to perform an equalisation via the CCGX advanced menu for the Quattro.

I have been to site and managed to get equalisation to start, but it only runs for a few seconds then drops out to float.

The setup is a 10kVA Quattro with an SMA 4kW PV inverter set to off grid.

The batteries are staring to deteriorate now with low battery warnings popping up regularly.

Any suggestions? Thanks

offgridsystems asked
Nacho Leon commented ·

2 Answers

Victron SmartSolar MPPT 20A 100V - setup questions

Hi All,

I am relatively new to campervan setups, and I do not have a background in 12v electrics.

I have had a Victron Smart Solar 20A 100V MPPT installed in my campervan together with a new leisure battery, which I am really pleased with on first inspection.

There are a number of options in the Victron Connect app to allow configuration of the Smart Solar 20A 100V MPPT, here are the settings I am talking about.


It looks like most of the settings (Charge Voltages etc.) are set by either selecting a Battery Preset (see options below), or by selecting "expert mode" and specifying your own numbers for the Charge Voltages. The "factory default" seems to be the Gel Victron Deep Discharge option.

The other Battery Preset options available are:



It says in the manual to ensure the settings match your specific leisure battery, and this is where I am struggling - I cannot seem to locate the information needed. The leisure battery installed is a 12V 110AH Xtreme AGM Leisure Battery (XR1750) NCC Class A.

So, my question are:

  1. Are the Factory Default settings ok for my specific battery? Or should I change them?
  2. If I need to change them, then:
    1. Should I pick another pre-set, if so which one?
    2. Or, should I use expert mode and set the Charge Voltages manually? And if I do, what numbers should I use?

A final (less important question) also

  1. What does the "equalisation stuff" do, and do I need to worry about it?

Thanks everyone!

monstreruk asked
tibo-huyers answered ·

2 Answers

10Ah AGM equalization MPPT75/15

Hey everyone

For a small off grid project (IR movement sensor and a connected 10W led light) I bought a 120W PV Panel and the MPPT 75/15 Controller. Those are connected with a 4Ah WET Lead Acid or a 10Ah AGM Battery.

Seems overkill I assume :-) But the thing is, the place for the PV panel is far from optimal. Direct sunlight for only 3 hours max.

I did some Tests today and I observe things I do not fully understand.

The Battery (yt12b-bs) I took from my motocycle was not charged since October 2020 and was quite low (11.78V). The Battery says normal charging at 1A, fast charging at 5A. I therefore kept the basic settings of 5A on the controller and started the process.

After a short time the controller switched from Bulk to Absorbtion later to float. After I disconnected the battery and gave it some time I could watch the voltage drop way below 12.7V.

I played with the settings and first of all set a max current of 1A. Now it spent way more time in Bulk state, eventually changed to Absorbtion and later to Float.

Once again disconnecting the Battery I still saw it fall back lower than 12.7V.

I read a bit about the equalisation mode and thought I'd give it a try. The settings on the controller are still at default (16.2V EQ Voltage) I put everything together and watched the controller.

I'm confused as the Voltage sent to the Battery never reached 16.2V It was stuck at the Absorbtion Voltage of 14.4V I then set the Absorption Voltage to 14.6V and saw the Voltage rise to exactly 14.6V (low amperage of 100mA in Eq mode)

My first question is: Am I wrong expecting to see a equalization Voltage to reach the configured 16.2V? Did I get the Idea wrong?

Secondly: The Voltage on Battery was constantly falling until it hit 12.35V where it stays right now.
Do you think this block is still usable? Oder might it be over with this one?

Thanks in advance

Best Regards

mauam asked
mauam answered ·

3 Answers

SmartSolar Equalisation Longer Than 1 Hour

I have set up a SmartSolar 150/35 on a new 48V bank of batteries. I connected the app and updated the firmware on the charge controller to the latest firmware.

I have used the Victron Connect app and bluetooth to setup the controller. Overall a very nice experience to use the software (very easy). Everything seems to be working well.

My battery provider recommended I equalise my bank at a fixed voltage for 12 hours, so I thought I'd use the solar to do two equalization runs of 6 hours over 2 sunny days. I set the equalization duration in the app to 6 hours (note in screenshot it says 4 because I was playing with settings) and then click the 'START NOW' button.

No matter what I do, when I click 'START NOW', the screen always tells me the duration is limited to 1 hour. It doesn't matter what I've set the 'Equalization duration' field to.

Is there any way to set up a manual equalisation to 6 hours as I require?




ozaaron asked
ozaaron edited ·

1 Answer

Manual Equalization not working on offgrid AC coupled system

I have a Multiplus 24/500 an MPPT 150/70 and a fronius 3.0 on the ac out.

I operate mainly offgrid. When I try to start a manual Equalization through the CCGX menu of the Multiplus, the process does not start if there is no AC input present. The MPPT takes care of the float of the battery and the AC Loads and the FRONIUS remains with 0W production. If I enable the AC input, everything works fine. The equalization starts and fronius kicks in. In fact after a while the equalization goes on properly and the fronius even feeds in to the grid.

The picture below is that state after I have asked the Equalization to start up.

So the question is : Will i ever be able to start a manual equalization without the AC input beeing present?


Vangelis Beligiannis asked
Alexandra commented ·

0 Answers

Skylla IP44 equalization voltage wont go above 14.6V

I have a Skylla IP44 12/60(3) running two banks of AGM Super Cycle batteries. The battery banks are not holding a charge (voltage drops prematurely under load) and I've been advised by my Victron distributor to try equalizing the banks. The equalization voltage is set to 15.9V, but when I put the charger in manual equalization mode it won't put out any more than 14.6V. Charger state is showing as "Equalize" on my CCGX.

What am I doing wrong?

curtisf asked
Saff edited ·

1 Answer

What is the right equalizer mode for Trojan SOLAR SPRE 06 255 battery?

I recently bought 8 SOLAR SPRE 06 255 batteries and formed a battery bank with a voltage of 48V. To charge this battery bank I use a solar charger from Victron. My question refers to the equalization charge that must be made periodically to these battery.
In the technical data sheet of the batteries I found only the voltage at which the charger is set when equalizing.
The charger has two ways to equalize:
1-with a current of 100% of the current used in the bulk phase, meaning 30 amps for this type of battery until the battery voltage reaches 64.8v, wait about two hours with a constant voltage of 64.8V, then finish equalization and pass in the float phase.
2-with a low value current, percentage of C20(229 amps), percentage that I don't know and please tell me about his value. Continue applying this current until the equalization voltage is reached, meaning 64.8V, after which the equalization ends and goes into the float phase.
Please tell me which is the correct option, and if this is option 2, what is the value of the percentage of C20 to be applied to the battery bank.

Best regards

mihaitaiosub asked

0 Answers

How to program equalization with Venus GX, MPPTs and DVCC on


My question: Is there a way to manually equalize or automate equalizing while using DVCC?

My problem: When DVCC is on it seems impossible to trigger equalizing. I have tried via the GX console or directly on the charger via VictronConnect. Without luck. When I switch off DVCC I can trigger equalizing with VictronConnect over Bluetooth on the charger.

My setup:

Island setup. No connection to the grid.

- Battery: 24 V, 900ah lead acid

- Panels: 18 275W. Configured as 2 arrays (east, west). Each connected to a charge controller

- Inverter: Multiplus 24/5000/120-100

- Charge controller: 2x SmartSolar Charger MPPT 150/70. Connected vi VE.Direct

- Venus GX

DVCC settings:

- DVCC on

- Limit charge current 100A

- SVS on

- STS on



oliveoil asked
oliveoil edited ·

0 Answers

Skylla Titan 48/25 with Gel battery bank, powered by 240v generator

The Skylla Titan charger comes with factory set values. My understanding is gel batteries shouldn’t be equalized. The charger IUoUo characteristic is 3 stage, boost, equalise, float.

My question is, should the equalize stage be switched off with these batteries? In The manual, it’s called equalize-charging mode. Options for 0, 4, 8, 12 hrs before switching to float. Factory setting is 4hrs.

If set to zero, it would then go from Boost to float before fully charging? Is that correct or is the equalise-boost meaning absorption?

Or keep 4 hrs and it will finish the last 20% of the charge with reducing voltage (not an over charge)?

Hopefully it all makes sense.

Thanks, Mic

micvw asked
micvw edited ·

0 Answers

Customize equalisation settings for batteries
Regarding equalisation of flooded lead acid batteries, taken from Victron manual:

This setting is intended for flooded tubular plate traction or OPzS batteries. During absorption the voltage limit increases to 2,83V/cell (34V for a 24V battery) once the charge current has tapered down to less than 10% of the set maximum current. Not adjustable with DIP switches. See ’tubular plate traction battery charge curve’ in VEConfigure.

I'm wondering if there will be an issue here. To equalise our batteries (to get in the 31 - 33v range as specified by manufacturer) equalisation charging current is usually around 50 - 55A, due to the size of our battery bank (1380AH). So I'm wondering if this will allow correct EQ charging. If it tries to equalise 10% of charger capacity (70A) being 7A it won't work. Or does it refer to 10% of battery max charge current, which is much higher than the 70 amps this inverter can do. Are EQ settings customisable or am I misinterpreting it?

Note that under all other circumstances 70a for charging is more than enough, its much more than they get from the sun the other 9 months of the year.

Specs from the battery manufacturer are as follows:

Equalisation current: 3.5% of C100 AH capacity (1380AH) gives us 48.3A. That sounds about right.

Should give voltage of 2.6 - 2.75 volts per cell (31.2 - 33v), thats about right, maybe at the lower end of the spectrum.

Interval: 20 days.

Duration: 2 hours.

They really do seem to need it at least once a month during winter, even with conservative DOD. I've attached documentation should you wish to view. Also note normal recharge maximum voltage should be 2.45v per cell, I believe that means absorption should be set to 29.4 volts. That was definitely the case with the PWM charge controller we inherited with the system.

So how to get multi to equilise correctly!

upperyv asked

0 Answers

Equalisation with EasySolar 48/5000/70 not working

I'm trying to perform an equalisation on my 16 Trojan T105 flooded cell batteries (2 banks of 8 x 6v in parallel). With batteries at 100% SOC, I pressed the equalisation start on the CCGX and although it read "starting..." nothing much happened - no bubbling of electrolyte. Do I need to tick the "Use equalization (tubular plate traction battery curve)" box in VE Config? Or is there something else I'm missing? I'm offgrid, no generator, 4kw of panels, with Victron EasySolar 48/5000/70-100 MPPT 150/100 Color Control.


John Berger asked
John Berger commented ·

2 Answers

Does it matter which device I initiate Equalization from?

My setup is Quattro 12/5000 - MPPT 150/70 - MPPT 100/30 - BMV-712 - Venus-GX

1. Does it make any difference which of the above three charging devices I initiate an Equalization from?

2. Do they all communicate and know that an equalization has been started so that the others don't interfere somehow?

larrysmith asked

0 Answers

Charging and equalising Victron AGM deep cycle batteries


I recently installed 2x110Ah victron AGM deep cycle batteries. Since my last battery bank (AGM but not victron) lasted no more than 2 years I want to be sure I make everything right with this one's

Charging parameters (285w solar panels) right now are

Absorption: 14,1v - 1hour

Float: 13,5v

I will like to know if this are ok and also if I would need to equalize them or not. I see very different information depending on battery manufacturer.

My solar chsrger let me program equalization schedule (every 30 days default), voltage and time

Thank you very much in advance


david-sanchez-pachon asked
Stefanie commented ·

2 Answers

Where do I start setting up victron devices?

Setting figures/numbers please required for my bmv-712 & mppt smart controller 100/30 setup....complete novice. I have 2x 160w solar panels, 2x varta la95 agm batteries, bmv-712 & victron mppt smart controller 100/30..Thank you and wait in anticipation.

vee42 asked
dayandnight answered ·

2 Answers

MPPT using periodic equalize function to give lithium a higher SOC

Other than increasing the voltage, is there anything about an equalize charge that would negatively impact a lithium battery? I regularly cycle my batteries between 20-80% but I'd like to charge them to 90-95% SOC occasionally and using this feature (and setting a 95% SOC voltage) while not technically equalizing/not damaging the bank would be great.

deeperid asked
Murray van Graan edited ·

1 Answer

How do I increase equalisation time?

Hello Victron community,

This is my first post and my first off grid system which I am still getting used to.

I have a Multiplus 24/3000/50, CCGX and six Northstar Blue NSB210FT. Now I know there are issues using these AGM batteries which require equalisation for 16 hours every two weeks.

I have tried the first equalisation today by flicking the switch on the multi which worked and went into equalisation mode but it seems to switch back to float after about an hour.

Is there a setting to increase the time?

Also to get the Multi to start equalisation I use the MK3 dongle and enabled equalisation in the VE configure but it mentioned “tubular plate batteries”, not sure if my batteries are tubular plate of not?

firmware on my Multi is 1910142 so assume it has the old microprocessor and that I can’t initiate Equalisation via the mobile app?

Any help is appreciate.



john-b asked
warwick edited ·

1 Answer

Equalisation using a EasyPlus Compact 12/1600/70 and generator


I have an EasyPlus Compact 12/1600/70 installed on my narrowboat. I have not had a generator and so during winter have just charged my 4 x 6v 225AH Powerline T105s using the engine alternator. I want to do an equalization charge and have borrowed a friends generator. The EasyPlus manual explains how to do a forced equalisation, but the LEDs it refers to trigger the equalisation charge are not labelled the same as mine.

I've tried to trigger it on the basis that top to bottom they are the same, but I just get the 2nd led light constantly, which is not what the manual describes should happen when equalisation is triggered.

Anyone done this with a similar unit?

chris-goodman asked

0 Answers

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
Nazareth Kevorkian commented ·

4 Answers

Batterie Balancer and charging AGM slow discharge batteries on a 48V bank of 4x12V


Being new here and after searching the forum, I didn't find an answer and I am looking for some help. Thank you very much for your time and answers.

I am planning to wire in serial, 4 Hankook 12V - 65Ah to get to 48V in order to drive through an Alltrax SR 48300 controller a DC Motenergy ME0909 Motor ( 48V - 100 Amps ).
1) Is it a mandatory to use Battery Balancers (like BMV-702 or 712 ) in a serial AGM Battery Bank ( 4 x 12V ) as I have read somewhere that AGM batteries don’t need equalization ?
2 ) I understand these batteries balancers work when charging but do they work also when running the motor and therefore discharging the batteries ?
3) What is the best way and easy way to charge these batteries ? Is it by charging them one by one with for example a Blue Smart IP22 ( 12V ) or directly with a 48V charger like a MEC ( 48V Charger )

Thanks again

louis asked
warwick commented ·

2 Answers

What is the purpose for equalization please ?

Hi ,

I have a Victron SmartSolar MPPT 75/10 hooked on my VW California Camper equipped with a 140 W solar panel.What is the purpose of equalization please and what are the recommended settings ( frequency of equalization )?

Kind regards,


serge-de-smedt asked
Guy Stewart (Victron Community Manager) commented ·

1 Answer

excess energy from the solar panel to charge hot water tank on a sailboat

I have sailboat with 2 solar panel 365W each , with 2 MPPT 100/30 and BMV702. On a sunny day at 10am all my (4) batteries (200A/hour each) are charged 100% and I want to use the excess energy from the solar panel to heat my water tank. (1500 W /110Vac). I have 3000W inverter from 12VDC to 110Vac. What kind of set up i need to heat up this water tank. Is victron energy has a monitor/equipment that can switch once the battery reach 100% charged to heat the water tank? If yes please provide more detail information.

richardlocat asked
Tom answered ·

1 Answer

Simultaneous charging-equalization


I have two arrays in two controllers charging sopzs batteries. Setting equalization separately am I sure the equalization will work simultaneously at the two controllers?

P.S.I have algorithm 2 for charging.

yorgos-papageorgiou asked
yorgos-papageorgiou commented ·

1 Answer

How to determine absorption/float/equalisation voltage

Hi guys

I recently bought myself a BlueSolar MPPT 150/35 CC to use in combination with a battery bank, consisting of 2x 6 V gel lead acid batteries (for golf carts): Golf Cart TAB Motion Gel Batteries (https://www.tab.si/index.php/industrial/display_smalltraction/4 ).

Now I ask myself the question how to determine the right determine absorption/float/equalisation voltage for this type of batteries. This link (https://chargetek.com/basic-information.html ) gives like a general rule of thumb for lead acid batteries: 2.25/2.4/2.55 V/cell ==> 13.5/14.4/15.3 V

I found there's a pre-installed program for forklift batteries: PzS tubular traction (1), 13.8/14.9/16.7 V. As forklift batteries are more or less similar to golf cart batteries and these numbers more or less look like the ones I found above, I intended to use this mode. However, I'm not quite sure if the batteries are tubular, and if that even matters.

Is there any other (experimental) way to determine these voltages?

Also, I read that it is not advisable to equalise gel batteries, is this right? Why not?

Thanks in advance!

mielke asked
JohnC commented ·

1 Answer

Will the Old Multiplus with 19 serial work with CCGX?

I have just installed an Old Multiplus 24V 3000VA with 1912xxx serial. I will love to have a GUI representation of the grid, battery and house loads as implemented on the CCGX. Is the old Multiplus compatible with a CCGX?

I also love the new equalization feature in the newest beta updates that enable me avoid the difficult specific switching sequence of the rocker switch to enter equalization mode. Is there any workaround for the old Multiplus?

Rainbow Solar asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Strange 100/30 MPPT behaviour in equalization

I have Bluesolar 100/30 and 150/70 (Easysolar)MPPTs connected to the same battery bank in 24V system. I have set both MPPTS to equalize in every 10 days. this is an offgrid installation. Noticed something strange with VRM and 100/30 charger:

- For some reason VRM does not show equalization in status graph, even though Voltage goes up indicating that equalization is actually happening.

-100/30 shows strange Bulk-OFF-Absortion state switching right after equalization. in one instance it ended to fault stage and was not able to recover from fault and I needed to disconnect and reconnect to get it working again.

150/70 seem to work fine, but not showing equalization in VRM

100/30 graphs:


150/70 graph (sorry that the panels are a bit misaligned) :


Any idea why the state does not show equalization in VRM or why 100/30 is behaving this way?

I won't be on site for a couple of weeks , but I would be happy to receive any feedback on this behaviour. Both MPPTs have the latest FWs loaded and have identical settings.

hemaris asked
hemaris answered ·

1 Answer


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