SOC Image

SOC

SOC = 0% on a full charged battery.

My question is, should I move the sending unit wire from the Magnasine from the battery to the load side of the shunt to get an accurate SOC reading

david-brooks asked
Justin Cook - Bay Marine Supply USA answered ·

1 Answer

multiplus SoC not syncing to 100% (mains backup system)

Hello,

I have a system with:

1 x MultiPlus 24/3000/70-50 firmware 476 (but problem predates this firmware too)

4 x Trojan SAGM 06 375

for mains backup.

----------------

Edit 2020-11-24

Having clarified a few things since first opening this post I'm listing here the key points as I see them:

The system is not triggering a bulk/abs cycle after anything except a very deep discharge. I.e. it returns straight to float after small to medium discharges.

This means that over time, with several small/medium discharges the SoC indication gradually drops off, when really it should return to 100% once mains returns after such discharges.

I have been told that, by design, the bulk/abs cycle is triggered when the battery voltage drops below 26.2V (2.6V, for 24V systems, below the set absorption voltage of 28.8V). This is happening here, yet the bulk/abs cycle is not activating.

----------------

Original post:

The SoC indicated by the system will not sync to full for long periods of time, which results in the system always showing well less than 100% even when in float. Please see the VRM screenshot below.

I raised this issue somewhere on Victron community/disqus a good while back, but can't find it anymore! We never got a resolution, but I recall it was discussed that the reason was:

i) the battery voltage doesn't drop low enough under the brief discharges/small loads to trigger a full bulk/abs cycle (the SoC does reset to 100% on the rare occasions this does happen).

ii) the repeated absorption feature (which is set at every 7 days on this system) does not trigger a SoC reset on completion

I'd be very grateful for any ideas on how to resolve this, especially now as the system is using the new "shut-down on SOC" feature, which means the batteries will be cut off sooner than necessary due to starting with an already low SoC.

Many thanks

[image]

Edit 2020-11-02

I've added vrm screenshot to compare charts for the same mains failure event for this system and another very similar system (only differences I can think of are 48Vnom/375Ah vs 24Vnom/375Ah and CCGX vs venus GX). This system goes straight back to float, other system goes through bulk/abs cycle.

[image]

Edit 2020-11-24

Just adding another screenshot here as we've had some interesting events over the last three days. Of note is how a bulk/abs cycle was triggered by the full discharge to 40%. However, the most recent discharge to 80% didn't trigger a bulk/abs cycle. I'm wondering if perhaps somehow this system has the bulk/abs cycle voltage level trigger of a 48V system even though it is a 24V system?

[image]

colin asked
colin edited ·

1 Answer

MultiPlus SOC dropping when charger in Storage mode and inverter is off

Hi

I recently set up a small UPS using a MultiPlus 12/800 and a 105AhC20 AGM battery. Everything works as expected and I'm also running Venus OS on a Rpi 3B to be able to monitor the system.

The MultiPlus is working as standby UPS (no ignore AC settings), so it only uses the battery/inverter if AC goes down or misbehaves.

Battery Monitor on Venus is set to MultiPlus on VE Bus.

I noticed that SOC keeps dropping about 0.5% every day. This should not happen as the battery voltage is 13.4V (temp. comp.) and no load is applied. I also see a strange random load of 1A being drawn from battery. This is probably related.

I was able to catch one, see below...

[image]

I been thinking...

Is this maybe caused by temperature compensation? (temp raising so charger lowers the voltage maybe causing false current readings?) If so, this can also confuse SOC calculation?


Any thoughts and help would be very much appreciated.


UPDATE:

So, if we had solar/external chargers or loads connected we shouldn't use the MultiPlus to calculate SOC, but if we have a basic setup like mine, with no external charger/loads, I think that would be a good idea that internal calculation could hold SOC at 100% after entering storage mode and if inverter was not being used, so it would ignore 'noise' readings like the ones I get that I think are caused by temperature compensation adjusting voltage.

[image]


moonlightrider asked
richardp63 answered ·

2 Answers

BMV-712 - How to keep SOC between restarts

Hello,

I have a system powered by a Li-Ion battery and I installed a BMV-712 to monitor the SOC, current consumption and voltage.

If I leave the battery always on, I have no problem - the monitor will detect everything, goes through charge cycles correctly, etc.

However, when I power the system down (i.e., turn off the battery) and power it up again, the voltage output of the battery is bellow the set "charged voltage" but the SOC reads 100%. If I uncheck the "battery starts synchronized" setting, it shows ---.

Via the manual, I know this is the default behavior, but is there a way to preserve SOC between resets? The load system has safety equipment that must be always on when in operation and must be connected directly to the power supply (sourced by the battery) and that consumes a lot of current, so leaving the battery always on is not an option.

Can I achieve this via VE.direct? I have an embedded controller that could store the SOC and be used to set last known SOC through the VE.direct port when powered up.

Thank you for your time

danielfz asked
klim8skeptic answered ·

1 Answer

Victron bmv 12 reading nanm

Last night my victron system shut down. Today I have charged the two 100ah lithium batteries. The BMV is showing 12.8v in the batteries but will not show any SOC information and in the time to go section it says nanm I can't find anything about this in the manual. The system is still working as I have power at the moment but I am.still concered I have damaged the batteries.

Many thanks for any information


oldelbow asked
danielfz commented ·

0 Answers

Unexpected relay behaviour - Multiplus 48/500 controlling generator switching on/off at minimum run duration

Hi, very confused, appreciate any views...

have a Multipus 48/5000 configured to close relay to start generator at defined SOC. Which it does.


However rather than running until SOC condition met, it runs for the configured "Minimum Run Time", stops, then 2 or 3 minutes later starts again...and so on until the SOC condition is met.

Maybe I have misunderstood, but I expected the "Minimum Run Time" to set a lower run limit in case the condition which initiated the start was resolved faster? Not to turn off the relay after that time, then re-assess all the conditions again?

Thanks!

energetic61 asked
energetic61 answered ·

2 Answers

Wrong battery percentage on the BMV712?

I've just bought my first sailboat, with a fancy bluethoot system for reading the stats of the battery and solarpanel.

But my question: The panel (BMV712) shows a battery percentage, and its dropping when there is laod on the batteries - still all good. But the percentage keep dropping even if I connect the shorepower and the batterycharger. This weekend I tried to watch it, and shut down all power when we left the boat for aproximately half an hour. During that time of the boat, the percetage raised from around 44/45% to 100%. The charger gives up to 30A, and the batteries are 2 x 100Ah, so it is not possible that the charger should be able to fill up the batteries so quickly...


What could be the problem?

eirik-stabell-rodsand asked

0 Answers

Within 2-3 days SOC dropped from 90% to 7%
Hi,
As you can see from the attached graph SOC dropped from 90% to 7% in the span of 2-3 days.  The system has been up and running since June and nothing like this have happened before. The consumption has been more or less constant for a long time (25W) and the only thing that draws power directly from the battery is the CCGX.

Could this drop be a result of some “maintenance” routine initiated from the CCGX or the BYD BMU/BMS?

The system consists of the following components:

•Color Control GX
•MultiPlus-II 48/5000/70-48
•BYD B-Box Pro 7.5
•SmartSolar Charger MPPT 250/60
•
Regards
Sveinung

[image]

sveinung asked
sveinung commented ·

2 Answers

ESS assistant charges and discharges the battery continuously when there is not enugh PV, why?

I know that my question pretty much describes what the ESS Assistant should do.

But is there a way to prevent continuous charging and discharging?

My AC loads are mutch higher then what my PV is generating, this is why the ESS Assistant draws current from the battery until my desired SOC is reached but then it swiches of the inverter and is slowly charging the battery with PV and after charging 5% above minimum SOC the inverter turns on and quicky emtys the battery down to minimum SOC. Since my AC load is always greater than what I can generate with PV. It would make much more sense to feed the generated energy directly into the grid to help power AC loads. There is no ecess power, so why always charging 5% of the battery and then quickly emtiy the 5% at maximum current.

I would prefer a constant output power when the AC Loads are higher then what i can get from the PV and then only store excess power in the battery.

Thank you for your Help.

felix-vt asked
layesp answered ·

5 Answers

BMV-712 capacity discrepancies

Hello, Group. I'm using a BMV-712 with a Relion 100AHr LiFePO4 battery that I purchased a couple of months ago. Both are in an emergency power battery box I built as a pandemic project. I mostly power computers, phones, and other electronics from it. I also recently acquired a Blue Smart IP67 12/25 charger to charge at 25A, and previously used a West Mountain Radio Epic PWRgate to charge at 10A.

The BMV-712 is configured per recommended LiFePO4 settings: 100Ah, Peukert exponent 1.05, charge efficiency 99%, charged voltage 14.2. What I'm confused by is the following:

Last discharge I hit 11% SOC, and voltage was 11.24 with 4.75A draw. Consumed Ah was reported as 94.5A, however. 5.5A remaining is certainly not 11% of 100Ah. From the low voltage, I'm inclined to believe that 5.5Ah was left, so why is the SOC saying 11%, and how can I align that with actual capacity?

Also, on recharge, SOC reached 100% some time (maybe 20 mins) before the charger output dropped down below tail current. The Blue Smart charger was still charging like gangbusters at 24.37A when SOC hit 100%, with voltage only at 13.92. I think there was around a 3A draw at the time. How can I set this up so SOC is more accurate?

Thanks,

Abe

abeness asked
abeness commented ·

1 Answer

BMV 712 wrong soc

Hi, my battery system has 920ah. After discharging 20% (184ah) bmv shows 87% soc instead of 80%. What settings do I have to tweak in order to get close to the correct soc?

Before all batterys were full and I synced manually. Thanks

[image]

skykay asked
Vangelis Beligiannis answered ·

1 Answer

BMV-702 wont SYNC - LiFeYPO4

First - Sorry
I know it has been asked before, but I can’t seem to find a solution to the earlier posts from other users. So, therefore, I allowed myself to ask.

Setup: My battery is a DIY (Winston 200AHA) project, a 12V system. 8cells in total. Two parallel and series.

From the last cell, the negative terminal is connected to the shunt for the BMV-702 (on the battery side of the shunt), from the load side of the shunt there is a 100A copper bar connected with all the negative connections to loads.

So that must be correct.

Problem: The BMV-702 won’t do the regular automatic synchronization.

Settings of the BMV-702:
01. 400Ah
02. 13.90V (.30 under the absorptions as recommended)
03. 02.0%
04. 01

I know that 03 and 04 normally are 4% and 3 minutes, it didn’t work, so I tried to make them smaller.

Have tried to sync when the battery is fully charged manually, it hasn’t helped.

Here are some screenshots from the settings:

[image]

[image]

sebastian-w asked
sebastian-w answered ·

3 Answers

CCGX menu : Use solar charger current to improve soc

Dear,

Tanks everyone to help me concerning my last topic ( Johon, Alexandra , All others ..

After reading the CCGX Manual and all interrogations concerning the SOC value on this forum, I loocking for this :

(B) Battery with Multi or Quattro and MPPT Solar Chargers -ALSO- An EasySolar with CCGX built-in

No battery monitor is required, as long as all MPPT Solar Chargers are Victron products and are connected to the CCGX. The CCGX will continuously read the actual charge current from all solar chargers, and send the total to the Multi (or Quattro) which then uses that information in its SOC calculations.

Configuration:

  1. Enable and configure the Battery Monitor in VEConfigure.
  2. On the CCGX, in Settings → System setup, verify the selected Battery Monitor. It should be the Multi or Quattro.
  3. In the same menu, verify that the option 'Use solar charger current to improve VE.Bus SOC' is enabled. Note that this is not a setting - it just an indicator of an automatic process.

Note that this feature requires recent firmware versions in both the Multis or Quattros (402 minimum), and the CCGX (v2.06 minimum).


After tcheck my Multiplus firmware ( version 413 and the CCGX version 2.60 ) I find the selected battery monitor but I haven't option to improve VE.Bus SOC ! ?


Do you know why ?

Thanks a lot, Michaël

mika2a asked
mika2a commented ·

1 Answer

How to reset SOC to 100%?

There is one past thread about this issue in which I participated, but it seems the recipes mentioned (and that I've been using) for some reason don't work anymore:

https://community.victronenergy.com/questions/39650/how-do-i-get-soc-to-show-100.html

For the last weeks I never got my system to show 100% again (or 85% for that matter). I've set MPPTs to have absorve voltage higher than what is set on Multiplus, I also made sure the absorption time was higher, but nothing seems to work. Never get to the 85% or whatever is set on the Multi.

I have run out of ideas...

My system is Venus based, no BMV, but no DC loads or charges.

Current Multi Settings are like this:

[image]

[image]

MPPT vales are what you wish.. tried even with 28.8V in absorption today.

See graph:

[image]


Why can't the SOC be recognized as 90% ?

Venus is running 2.60, not since too long ago. Could be something within Venus OS?

I also tried Multi connecting to GRID -> Goes straight to FLOAT, SOC continues at ~30%

This is an old issue... but for the moment, besides trying to figure out the root cause for the system not resetting every day to 85/90%, what I would like to ask now - as a workaround - is how to manually force the system to reset to 100% ?

I used to do the trick of commanding the Multi to Equalize from Grid and then Interrupt -> go to absorption / Float. It used to reset to 85% (that was at the time set). But now even this is not working.


elimac asked
rubas commented ·

6 Answers

Feature request: Dynamic Grid-Setpoint in ESS, based on top SOC.

Currently the Grid-Setpoint in ESS is a static number (in watts) that controls how much system power is allowed from grid, with the remaining load being served by incoming solar and/or battery capacity, down to a tolerable SOC. While that works great in the assumption of keeping batteries @100%, every day, it’s not so good for long-term health and maintenance of lithium batteries, in a (stable) grid-tied system.

I would like to suggest an upper limit to the SOC (other than default 100%), at which point the ESS would dynamically shift the load more/less (by changing Grid Setpoint) to charge the batteries when they’re below the high mark, and otherwise running the load off of solar or battery capacity, down to the existing minimum SOC (as normal)... or similar type of functionality.

Currently, I’m constantly changing the Grid Setpoint down, to serve the system loads from the incoming solar preferentially, as much as possible. Then resetting it up again at night, to keep the batteries above a reasonable SOC. While workable, it is way more manual than it needs to be.
I believe adding a simple top SOC to the algorithm that controls when to shift to using solar would greatly simplify and automate this process.

geomz asked
lucode commented ·

0 Answers

SOC measurement issues

With a BMV712, shunt that is correctly wired and an ESS MP2/Smart solar MPPT setup (victron gel batteries), I have continuous issues with reported SOC and what it does with system performance.

I only use the top 30% of battery for use overnight.

On a good day, SOC gets to around 97/98% when the shunt will sync the SOC to 100% (my shunt charge voltage is midpoint between float and absorb at 55.4V).

The problem comes in if there has been a bad light day, or like now in warm temps (31C) the inverter decides to not do a bulk/aborb cycle as the voltage is at a temperature adjusted float voltage and can't trigger the sync. The only change in the environment is temperature and with increased cooling loads ESS hits the minimum SOC threshold very early in the morning.

The inverter stays permanently in float. Unless I manually sync the SOC, it will continue to slowly leak, which means there is less discharge by night.

I have several installs all doing the same thing where before the increase in power required at night and the increase in temps it worked fine.

Trying to get assistance with this is near impossible.

The shunt should be able to do a better job of measuring the SOC.


nickdb asked
JohnC commented ·

1 Answer

Defined high/low state of charge limits

I have a victron 48V bank (4x200Ah smart), bms, smartshunt, cerbo, BlueSolar Charger MPPT 150/45, batteryprotect, li-charge and multiplusII (yes, all in on victron stuff :) )

Goal is to have it autonomous as much as possible.

Currently when charging, the systems always tries to charge to 100% where the bms is shutting down multiplus and the li-charge relay where the solarcharger is connected. As I don't want the batteries to sit at 100% for long (which they then will do during summer months when we have plenty of sun) in order to keep battery lifetime as good as possible, I'd like to define a upper limit like 75% SoC perhaps. The system should then try to charge to 75% and at that level only add energy (via solarcharger and/or multiplus) as needed in case of load to keep it at 75%. And yes, I would need to now and then charge up to 100% so the SoC measure isn't drifting off. The manuals suggests once per month so can be a manual thing todo, perhaps with some notifier via VRM...

Similar for the lower limit... instead of bms shutting down load at battery protection level, would be nice with a definable lower level like 35% SoC. Have not so much experience of this part of the energy envelope as the system so far coped good with load :)

This would also allow one to test and make sure the protection mechanisms will work, without having to actually be at the edge of safe SoC range.

Haven't found howto do this, or should it be possible?
If no, perhaps add as a enhancement request?

saxofon asked
saxofon commented ·

1 Answer

Victron Inverter chargers and float voltages ? why do they not retain ...

Good day all . A question thats been burning me for a while .. given that ive installed alot of lead acid and lithium systems i have been evaluating the charge and float profiles and their results ... i find this alot in systems with Standby application no solar .. and alot with No comms to batteries no canbus or DVCC enabled.. Just a plain backup ..
So Scenarios are such inverter charging battery from the grid and battery permanently connected to the inverter as should be.
the inverter charges up to 100% and reaches 55.7v (16s Lifepo4)
then the system switches to float where is should retain voltage --- NOT HAPPENING
then a rebulk or re absorb should take place in 7 days .. ---NOT HAPPENING

technically a 0.2v per 12v method is used meaning in a 48v system we should get a drop on float voltage of 0.8v to get a reabsorb ... ---- NOT HAPPENING.

Alot of battery systems use contactors and Bms systems internally which account for internal draw from the battery cells . and in which case means that the battery does take some load to retain the voltage from the inverter ..
We get to point where the SOC falls and falls and battery is never recharged with lithium ticked ...

But why would this not take place on the inverter with a predefined float value is my question and why does the deviation value not kick in the recharge .. when lower then 0.8v below float ?


A little more details i feel should be added in .
Two different inverter units, one multiplus 3000va 48v unit
the other multiplus 5000va 48v unit.
Both when set to a float voltage of 50.6 to 50.7 charge the battery to 100% Lifepo4 . 15s configuration .. after this process they dont retain the float voltage of 50.7 ... the battery has bms and circuitry internally that uses power.
Storage Not ticked .
Lithium batteries Ticked on
Both units are used only for power back up purposes and both units have Venus GX connected .. Pulling my hair out .
Please can some one chime in .. I dont want to have to run with DVCC as this is not 100% working and surely the default profile to Float maintain voltage should do its job unless i am missing something often after two weeks or so the voltage of the batteries drops to around 48v .. Not good .

nismoboy34 asked
Guy Stewart (Victron Community Manager) commented ·

0 Answers

Why Pylontech Batteries only reach 97% SOC

After the upgrade of Venus GX to v2.20 software, everything worked fine. The daily usage pattern is largely the same when I noticed Pylontech batteries (4xUS2000B) only reach 97% SOC (originally 100%) with plenty PV capacity available. Matthijs kindly advised that the end/of/charge voltage was lowered to fix an occasional over voltage shutdown from the Pylons and they are discussing various things with Pylon R&D though perhaps with some changes on both sides. Are there any planned changes envisaged or recommendations readily available? Charger is a SmartSolar MPPT 250/100.

henrij asked
nismoboy34 commented ·

2 Answers

No "Use solar charger current to improve VE.Bus SOC" option

CCGX v2.58

Quattro 48/5k-120 v4.30

SS MPPT 150/100 v1.50


With the Quattro selected as the battery monitor, my CCGX does not display the "Use solar charger current to improve VE.Bus SOC" status.



snoobler asked
elimac commented ·

0 Answers

remotely sync BMV SOC

Is there any way to remotely sync the SOC on a BMV, like you can do via the app with bluetooth?

Would be handy to use the remote console, but the option doesn't exist.


nickdb asked
nickdb answered ·

1 Answer

Optimise BMV SOC detection with ESS

I have a BMV712 connected to 4 x 220AH Victron Gel batteries in series, an MP2 3kVA and a 150/45 MPPT using ESS.

I put the bmv in when it became obvious that the MP2 was useless at accurately reporting SOC.

I have tuned the BMV as per docs and some guidance from victron (charge voltage midway between float and absorption, extended the time needed to sync to 8 minutes and reduced the tail current to 1.9%).

This works most of the time, the SOC gets to around 98% and then syncs.


Where it falls apart is if when there are bad PV days and the charge voltage is closer to float, the batteries don't sync. after a couple of days you end up with charged batteries but with a decreasing SOC reported.

When batteries discharge you now hit the ESS SOC limit too quickly (only use top 30%) which means the batteries never discharge far enough to hit bulk/absorption.

You're now get stuck in this float/discharge cycle, with battersafe increasing limits making it worse.

Being unable to force a remote sync means it is a real problem to break this cycle without having to start changing the ESS schedules and limits.


Is there a better way to setup the BMV?

For those doing partial discharge of batteries it isn't difficult to end up in this loop.


nickdb asked
nickdb commented ·

0 Answers

Multiplus 2 with Victron SmartSolar MPPT - incorrect SOC

The State of Charge is displayed incorrectly on the Colour Control GX display and it's showing a drifting pattern towards 0%. A the moment the SOC reaches 8% during the day and goes down to 0% over night, even though the batteries are fully charged up.


We have the following components in an off-grid system we installed for our client:

1 x Victron SmartSolar MPPT 150/70-Tr

1 x Victron Multiplus-II 48V/3000VA 35-32 inverter charger

1 x Victron Colour Control GX

4 x Deep Cycle AGM Battery 12V 200Ah C20

12 x 330W solar panels


The system is connected to the internet via VRM.


The MPPT charge controller charges the batteries up, by 8.30-9am in the morning and then goes to float for most of the day.


Why is the SOC displayed incorrectly?

Technical support from the distributors suggested installing the BMV or the Smart Shunt to fix the issue. However, the Victron manual says this is not required. The site is far away from our office.

Can anyone point me in the right direction how to fix this issue?


I've read the other threads with similar issues but the solution proposed didn't work for me.


I really appreciate your advice.


Here are the settings from VE Configure on the Multiplus II:

[image]


[image]



Here the SOC graphs from the last 30 days:

[image]


Here the voltage, current and MPPT status from today:

[image]

offgridpowerwestoz asked
JohnC commented ·

2 Answers

SmartShunt 500/50 and SmartMPPT 75/15 combo

If I buy a SmartShunt 500/50 and network both of them together, can the SmartMPPT 75/15 use the more accurate SoC info to shut of the Load? So enhance or replace the BatteryLife algorytm?

Or will it just give me better info on the phone, but the BatteryLife still uses the voltages?


cybermaus asked
Jesse answered ·

1 Answer

Incorrect SOC monitoring

Hi,

Till now I dind't quite succeed in having the SOC showing in console (what I think should be) correct measurements. My system has a Multi 3000/24/70-16 and 2 solar chargers, VenusGx. The discharge seems linear, from 100% going down... but the charge seems to stall and I only get to 100% after a on grid charge by the multi, and only after full absorption period.... makes a big leap from whatever stalled value it has to the 100%. In solar not even this.


So, I suspect I have incorrect values somewhere, for example in the VE Config battery monitor section:

[image]


My batteries are 730Ah, but this is the C100 value (they are OPzS). What should we use? C10 instead?

Efficiency - is this to take into account the losses on cables? Could it explain the SOC never reaching to 100% in solar?

State of charge when bulk finished, left it on default...


Since my SOC monitoring has not being very reliable, I can't use it as trigger for other functions, which I would like to do... any help appreciated.



elimac asked
snoobler answered ·

10 Answers

Charging on Quattro in dependence of SoC

I want to stop charging if Soc is 80% and restart charging im Soc is less than 40%.

I have a Quattro, CCGX und an Ve.Bus BMS (REC-A)

Where can I set this parameter ?

wolle4000 asked
merlepeter answered ·

3 Answers

Using Multiplus SOC-low-shutdown with BMV SOC value

Hi all,

If I update my Multi to the newest firmware I could use the new feature "SOC-low-shutdown".
In past I used to take the BMV-relais for that, but now I am wondering if this would also be possible with a software solution.

In VEConfig I have to enable the battery monitor of the multi to use this feature. So the question now is:

Can I use the Multi's SOC-low-shutdown feature by using a venus device which overwrites the VE.Bus SOC with the one from a BMV (or BMS)?


Normally I would just try it, but there is no reason for an update if this won't work :)

Thank you!

porcini asked
merlepeter answered ·

5 Answers

Multiplus 12/3000 low voltage shutdown vs low SOC shutdown - Both triggers active ?

Hi - have a question about the multiplus shutdown configuration and precedence.


If you have DC voltage settings for low voltage shutdown, AND low SOC shutdown, is it safe to assume both settings are active and shutdown may occur based on which ever trigger occurs first ?

SOC will be provided via smart-shunt/BMV to ve.bus as configured on VENUS OS device. Thus it's possible to have the smart-shunt/bmv incorrectly report SOC if the setting "Battery starts synchronized" is turned on; So the battery voltage could be way lower on a somewhat depleted battery yet the bmv SOC says 100%, if you have reset power to the BMV. Thus I'd expect the low voltage triggers to take effect.

Of course we usually try and disable this "start syncronized" setting to prevent misunderstanding true state of charge until the battery has gone through a true charge cycle. Which also begs the question:

If you restart the BMV and it's SOC reading is not available until a full charge has completed, will the inverter just pay attention to the voltages at that point ? I'm assuming a SOC is not presented to the ve.bus/inverter until the full charge has completed.


thanks in advance.

chad-smith asked

0 Answers

Battery non returning to 100% SOC

Hello

Getting to know my new boat system with Quattro 24/5000/120, Lynx shunt, and Cerbo.

battery state of charge has been holding at 100%. Quattro has been in storage mode.

24 hours ago disconnected sure power for six hours. System was down to about 70% state of charge reattached. Reattached short power. Quattro went immediately to storage mode. Voltage has returned has returned previous state after 18 hours but state of charge percent is only at about 81%

Questions

Should Quattro have gone to bulk charge immediately?

Why is SOC at about 80% even though voltage is returned to previous, after 18 hours?

Thanks

[image]

[image]

oldtug asked

0 Answers

EasySolar-II SOC keeps falling and never rises?

Recently commissioned a EasySolar-II 3kva 48v system running PowerPlus Energy 4kwh ECO module. Setup battery monitor on VEconfigure, programmed mppt as per powerplus recommendation and all looking good. About 5 days later system shutdown on low SOC cut-out, went to site and batteries full and on float but SOC showing 15% so it had slowly gone down each day after i left but was in fact being charged fully each day. Where have i gone wrong??

mark-dreyer asked
misullivan edited ·

2 Answers

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