I would like to connect 2 Quattro 15 kva in parallel for an output of 24 kW. I would also like to connect that output to the 100 amp Autotransformer to obtain a 120-N-120 split phase (USA). I have seen the circuit diagram describing a similar connection with 1 Quattro, but I have not been able to confirm if you can do with two inverters in parallel. Thanks!

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Is the MPPT 100/30 suitable for 5x 120Ah lead-acid batteries connected in parallel? All batteries will be of the same type and new.

If yes, what should I keep in mind?
What is your recommendation for 600Ah?

Why 5x 120Ah? Because they currently have the best price performance.

Hi All,

So this has got me stumped :( I have tried everything else that could possibly cause this issue but think it may be my setup with the charging. So here’s a summary:

I have a 36v Ezgo golf card which previously ran on 6 x 6v Trojan Lead Acid batteries. As a company we have recently got into the solar field so wanted to "experiment" with converting the cart to Lithium batteries as a side project. After quite a bit research I settled on 3 x 12v 108Ah Blue Nova Mobile batteries in series (https://bluenova.co.za/wp-content/uploads/2019/03/BN13V-108-1.4k.pdf).

To cut a long story short we did the conversion and it works brilliantly. Then came the issue of charging. One option would have been to use the 36v charger I already had for the cart. However, my concern there was that the "charging algorithm" on the charger was for lead acid. I did some research on Lithium chargers and found one expensive 36v option. I then got chatting to my Local Victron dealer and he suggested I use 3 x Blue Smart 12v (25A) chargers and install them in the cart permanently wired up to the batteries. What I liked about this idea was that I would be certain that each battery would be charged equally and would never get a battery imbalance (and it worked out cheaper) 12 So I went this route….

Fast forward 2 weeks – cart is going great, no issue and then suddenly battery 2 & 3 turn off (being battery 1 connected to main positive and battery 3 connected to main negative) 1 i.e. the internal battery BMS shuts off… I have gone through COUNTLESS different theories on what could be the cause (from parasitic drain, to wiring etc) but at the moment I’m wondering if the following could be happening (but need someone VERY knowledgeable people to prove or disprove).

So could the following be happening?:

1. Battery 2 and 3 discharge just ever so slightly more than battery 1 during use (as battery one is connected to main positive and batter 3 to main negative).

2. Then during the charging “somehow” the three chargers pick up on when the first battery is full (battery 1 in this case) and then all three chargers move to the next charging phase (say from bulk to absorption).

3. This leads to battery 2 & 3 losing out on just a little of a full charge each charge cycle.

4. In my case the cart is used daily and uses about 30 % in a day. After about 2 weeks maybe that “ever so slight” loss on every charge cycle drops the battery to a low level and the BMS turn off the battery to protect itself?

5. It is a “theory in progress” as the batteries where turning off every few days until I separated the 3 batteries, charged them, put them back in series and then for the past 2 weeks it has been perfect (until yesterday when they shut off again). So last night I separated the batteries again, charged them up and ill see how long they last.

6. So in summary, I suppose what I’m asking:

a. Can you use three of the Blue Smart 12v (25A) charges on 3 x 12v batteries connected in series (i.e. one charger connected to each battery)?

b. In such a setup would they in any way affect the operation of each other?

As a last note, I did install a BMV-712 Smart BUT because of the way the chargers are connected directly to the battery the “input” from the chargers cannot go through the shunt. So its set to reset to a full state of charge at a certain voltage (approx. 42v). This has helps me see what the parastitic drain is (approx. 0.01A) which I think is acceptable. This was verified with a clamp meter.

Any other suggestions would be appreciated 12

Thanks,

Richard

Hi there,

I have recently doubled my storage battery from Pylontech US 3000 (3.5kW) to 2x US 3000 (7.0 kW

I am running MPPT 150 / 45 Solar Controller and Multi Grid 48V/3000VA/35Amps Inverter / Charger.

The displayed charging current and Wattage seems to be that of only one battery as it does not compute up to the display on solar yield vs consumption.

I have connected the data link from Master battery Link Port "1" to Slave battery Link Port "0"

connection to Venus GX is from "CAN" port

Any advice please

`Hei

I frequently use remote control in my ccgx. This has been working fine several year. Last week the remote console in vrm connects to my ccgx, asking for my password... when I type, nothing happens. I clearly have connection to the site, and data logging is working correctly. When I arrive on site, I access on lokal network... and everything is working fine. I have runned update, different browsers and reset everything. anyone experiencing something like this? I have not changed internett provider... everything is the same :-(

mvh vegar bartnes

Hi,

it would be nice, the everyone can choose if he would use the limiting to 52.2 Volt when using Pylontech batteries or not. A simple switch to yes/no would be nice.

See: https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom#my_system_only_charges_the_battery_to_52v

I thought the battery-icon with bars was in direct relation to SOC.

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It would appear the Consumption data has stopped displaying after the 7th October. Everything else seems to be working.

Before the MPPT regulators from Victron had a problem with switching too early from BULK to absorption, causing the "count down timer" to start and never bring large lithium ion packages to the set absorption voltage before switching further to FLOAT.

This however was fixed in the firmware 1.42 and later firware releases. Nice!!

But I experience some of the same problem with the automatic EQUALIZE setting.

To periodicly balance my lithium ion batteries correctly, I have programmed my MPPT to do an automatic equalize to 28,70V every 7 days. I have chocen these obtions:

Equalization current percentage : 100%

Automatic equalization: every 7 days

Equalization stop mode: Automatic, on voltage

Maximum equalization duration: 7 hours

When I check the history page of the MPPT, I realize that the regulator has charged up to 28,60V instead of 28,70V in equalization mode, and than left the EQ mode. It should charge to 28,70V. (The maximum eq duration had not expired, so that is not the reason)

Of course I could use the "Fixed equalize time" mode instead, but the fixed time does only provide a fixed time in EQ mode, not a fixed time at the set eq voltage.

Victron, I kindly ask you to do one of two:

Either:

Create an equalization obtion where one can choose a fixed time for staying in EQ after reaching the set EQ voltage (like the absorption works today)

or:

Make an adjustment so that the MPPT actually equalize charges all the way up to the set EQ voltage (and maybe keep the voltage there for a few minutes) before switching to float when in the "automatic, on voltage" stop mode.

This is a brand new unit. With input voltage between 21 and 24.3 I get an output voltage of 19.4 +/1. The ground is solid all the way back to the battery. I'm baffled. Looking for guidance.

Thanks

Hi!

Based on various documentation and community threads we have decided to do the following for winterizing our boats:

- deplete batteries to around 60%

- disconnect the Multi/Quattors connected

- disconnect all the loads, even BMS and BMV

Since we usually have 12V chargers with AGMs connected on the AC out, would keeping the Multi/Quattro On without batteries connected work to tickle charge the AGMs over the winter? I suppose when this doesn't see the BMS it would immediately disable charging, but would the passthrough work? Do you think we will need to reconfigure the chargers to remove the assistant and set the max charge to 0 Amps?

We would like to avoid rewiring to whole thing and connect AC out to AC in directly.

Would the cells stay in balance over these months?

Any suggestions? other best practices?

thanks

eliott

I have a pair of Lifeline AGM batteries that I want to equalize/condition, as they’ve been sitting unused for a while. Lifeline recommends doing this periodically, as follows:

“First go through the normal charge cycle to bring the battery to full charge. The conditioning charge should then be applied by charging for 8 hours. At 77°F (25°C), the conditioning voltage should be set at 2.58 VPC (15.5 volts for a 12 volt battery).”

(There follows a temperature compensation chart. At my ambient temperature, 15.6 V is what they recommend.)

The gist of my problem is this: I have been unable to get my 75/15 to put out anywhere near 15.6 V in equalization mode, or to equalize for more than an hour at a time, regardless of what settings I choose in the VictronConnect app. I’ve read and reread the 75/15 manual, but it doesn’t cover manual equalization, or any of the “Expert Mode” settings available in the Victron app.

Here’s my hardware setup:

* Two 100 W solar panels, tilted and aimed at the sun, under clear Arizona skies. They’re connected in series and are putting out more than 40 V. From past experience I know I can get at least 180 watts from them under these conditions.

* Victron 75/15 solar controller (firmware v1.42), with settings controlled by the VictronConnect app (v5.11) running on an iPhone (iOS 13.1.3).

* Two Lifeline GPL-6CT batteries connected in series, for 300 amp-hours at 12 V.

Again, my goal is 15.6 V for 8 hours, as the battery manufacturer recommends. So I go into the VictronConnect app’s battery settings. I choose “Expert Mode.” I set the equalization voltage to 15.6 V. I set the equalization stop mode to “fixed”, and the equalization duration to 8 hours. I tap the button to start manual equalization. That’s where things go wrong.

First I get a warning that equalization will be limited to 1 hour. And indeed it is: regardless of settings, I have to manually restart the process every hour. What happened to my 8-hour fixed time setting?

Worse, the controller never puts out more than 15.2 volts, despite the fact that I set it to provide 15.6 V in equalization mode. It has plenty of power available from the panels, but is only drawing 19 watts. 15.2 V is obviously not enough to do the job, per Lifeline’s recommendations.

What am I missing here? Why can’t I get the 75/15 to do what its settings say it will do? Any help will be much appreciated.

Just installed a Multiplus 24/3000 and have powered up the system on a few short times to determine the status and resolve the faults. I do have the mutiplus on with com unplugged but the battery switch is off so NO power to the battery. Yet have turned on the BMS switch many times to determine system status. One being had to load the BMS app. Then reset and got this when I checked the battery via the blue tooth app. How would I go about clearing this fault and any idea how this would occur ?

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Can the Phoenix Smart IP43 Charger be remotely switched on/off from Venus GX (when connected via VE.Direct)?

Hi, any plan / timeframe for use the venus inputs to :

bms charge/load inputs. So mppt and inverters is handled from venus Easi with 3. Part lithium.

inverter start/stop

emergency stop/standbye of inverters.

To chose generator start / stop algoritme. (instead of silent/normal in menu)

we really would like to move away from inverter assistand and configuring, and have more concentrated to the venus device, and let that relate to multies,

last, maybe put in new question,,,

ve direct devices remote configure..- when?

its a big problem its no easy way to remote control bmv and solar chargers from remote.

i know that has been planned for victronconnect app, but what is timeline.?

i would also like more control from inside venus on ve direct...

so can adjust bmv settings for fully charge.. to sync soc to 100% etc.

I have recently hooked up my BMV712/MPPT Solar to VRM portal via VenusOS - its really great and loving it so far.

I have battery temp being fed into the network by Smart Battery temp sensors. And this works as I can see Batt Temp on the solar? (or was it the BMV?)

Anyway - I was wondering if I am doing something wrong as despite the battery temp being on the network, it is not passed through to VRM.

Thanks

Al

Good Evening Victron Community,

I have installed a Multiplus II GX in a topology with all Non-Critical Loads upstream of the AC Input. Critical Loads on AC Output 1 as usual.

When installing the External current sensor on the Main Circuit and returning from an Outage the Inverter gave an Error 24 related to the backfeed relay.

Although the error makes sense to me regarding it seeing Current (from the external sensor) while it was expecting no current (Ac-In relay open) I would think that selecting the External Current Sensor Connected tick box in VEConfigure would tell it to ignore this discrepancy?

I have since removed the Current Sensor (and unticked the tick box) and have tested the exact same outage successfully without Error24.

Although this post mostly serves as a possible bug flag, I would like to end it with a question.

Would it be possible for me to install a three phase Grid Meter upstream of the AC Input and non critical loads (Carlo Gavazzi 65A) instead of the Current Sensor and still avoid this Error 24 Situation?

If yes, would I be able to add an unpowered USB hub onto the USB port to have both an external Wifi adapter and USB to RS485 adapter on the GX portion in order to connect the Grid Meter?

Kind Regards

Randolf Wenhold

Hi Victron,

I just want to make sure I'm understanding this correct. I have a Multiplus 2 which appears to be the unit without the temperature sensor inputs. For temperature sensing to be incorporated with the Multiplus 2 you would require the VE.BUS smart dongle. I also have a Venus GX device with additional temperature probes.

On the VE.BUS smart dongle manual however it states the following:

"In systems with a GX device, and another source of temperature and voltage data (eg from a CANbus battery), the CCGX data will override temperature and voltage information from the dongle."

Based on the above explanation it seems that the dongle is not required anymore if you want temperature compensation to happen as the Venus GX uses its temperature probe values? Previous older posts it states that the dongle is needed.

Could some light be shed on this please so that I can make the correct decisions?

Thanks

Can my easysolar unit, BYD battery box and generator share one grounding stake?

Hello

I am getting confused on how to wire Allow-to-charge and allow-to-discharge relay from BYD box 2.5-10 to EasySolar 48/5000/70-100

[image]

[image]

The system comprises of three Multiplus 24/5000 in 3 phase configuration. Batteries are charged from two MPPT 150/70 Ve.can charge controllers.

Generator 3phase 30kVA

If the battery voltage drops below the low shutdown point 23.6V the multis start the generator. However, if what ever reason the generator fails to start the inverters shutdown. Low shut down is 21.6V, Inverter low restart is set to 23V.

The next day, the charge controllers kick in and the battery voltage increases well above the inverter restart threshold of 23V, in the last instance it was near 27V. However, the Multis do not startup on their own, they have to be switched off and then back on.

For extensive periods of time, this is an unattended site and although someone would have to go and trouble the issue with the generator, it would be better to have power as soon as possible.

Anyone experienced similar issue or knows why the inverters wont start on their own?

Hello,

I noticed that my BMV is calculating a too low SOC value (yes, it has been days since 100% charge reset), so I thought my currently set 1.05 Peuker's coefficient is too small for Tesla batteries. I adjusted it to 1.02 and to my surprise SOC instantly went down (?!) from 28% to 21%. Adjusted it back to 1.05 - SOC went back up to 28% again.

1. To my understanding, adjusting Peuker's closer to 1.0 should increase SOC not decrease it, shoudn't it?
2. Shouldn't the Peuker's coeff. be applied only during real-time? How is it incalculated into the SOC? Is BMV saving all historical Ampers that have flown through it since last 100% (I'd think that's highly unlikely)? If not, what's the formula? Consider that there's no temp. compensation, etc.
3. Is there a situation where Peuker's coeff. of, say, 1.02 not only decreases capacity, but can increase it?
4. Now I have set it to 1.0 to see how the SOC is being calculated without it. What params to use in BMV to make SOC calculation trivial as such (i.e. without no Peuker's, temperature, efficiency, etc. magic):
   
   (Consumed AmpHours / Battery Capacity) - 1
   
   If I do this calculation I get 30% SOC, which is closer to reality than currently reported 21% with Peuker's 1.0 and charge efficiency 98%.

Thank you for your insights!

Hello, For a Multiplus 12/3000 and 400ah lithium battery bank, and 1200 watts solar array, I was testing the AC input by simply making one VEconfigure change - by enabling the "dynamic current limiter" while connected to 50 amp shore power connection. I left the "input current limit" at 50 amps, UPS is enable, PowerAssist is enable, Weak AC is disabled.

With a typical load of around 450-400 watts AC, and about 120 watts DC, the system powers loads with no issue. However, when trying a significant load - example a microwave drawing 1800 watts, the Multplus 12/3000 crashes with over current and low battery. I'm wondering why would enable "dynamic current limiter" even matter when there is a 120vac, 50amp shore power available to just drive the loads?- meaning with the "dynamic current limiter" dis-abled, there is absolutely no issue. Should I be setting the "input current limit" to something less that 50amps - example: would setting the "input current limit" down 10% (45amps) is that makes any sense. I really would appreciate an explanation in that crashing the multiplus with load.

Yeah I should mention: Testing the "PowerAssist" functionality is spot on, and performs with my intentions and satisfaction. What I'm trying to accomplish is that I'd like to just enable "dynamic current limiter", even when plugged into 50amp shore, and dial back the "input current limit" when connected to a genset,

I am trying to connect my brand new Multiplus GX to the VRM app. It is connected to a working ethernet cable, and has AC in. The VRM ID printed on the sticker cannot be found when I try to add a device in the app.

What should I do?

Yesterday I experienced once more a "weird behavior" of my to-be-experimented-upon-Quattro (2658, firmware 408): after modifying the battery voltage threshold for inverter shutdown from ridiculously low 37-something to 41-something and the subsequent reset of the device, the Quattro stubbornly refused to even look at (the present) mains.

I mean like unexplained behavior - to me.

As over the years I developed a somewhat close relationship to this specific Quattro, I might even say to have some kind of intuition about its feelings and desires. So I intuitively switched it to "charger only" mode" (1st blackout). Et voila! It recognized main and started charging the battery.

I then switched it back to on (2nd blackout) - Et voila again! Now it saw mains and started to behave as expected. Maybe I will start calling her(?) "my little diva".

Now: I know Victron is a little reluctant with people updating their firmwares, although it seems not as rigorous anymore as it was in the past:

https://www.victronenergy.com/live/updating_firmware:updating_ve.bus_products

versus

https://docs.victronenergy.com/victronconnect-vebus.html#when-to-do-a-firmware-update

which I find a good development. It makes the user feel being taken more seriously. While I agree with the general sentiment that firmware upgrades shouldn't be done lightly or as some trial&error a.k.a. "cargo culting", I think that giving users even more information at hand so they could make an informed decision whether to upgrade or not would be a good idea.

There is a quite nice "changelog firmware.docx" file under https://professional.victronenergy.com/downloads/firmware/ and I am not aware of it being available publicly. If it isn't - here's the thing: It may seem relevant only to those who actually do have access to the .vff files, but in fact this changelog file should be available to everyone.

If read carefully, one has a so-called "diff" of the features of a current firmware and the present firmware in one place that should ease the decision "Yes I do/do not need a new firmware." It also - if you are able to read "between the lines" gives proof that it is NOT desireable (as Victron points out) to really keep your firmware updated to the newest version.

I read the changelog today, to see if something in there could be applied to my "ignoring mains" situation. And there it is:

xxxx456

Bug fix. Some models exhibit occasionally rejection of the grid

At least I believe that is relevant to my situation. But wait, it doesn't end there. While reading through the changelog (since 408) thoroughly, I encountered

xxxx428: Bugfix "parallel and 3-phase not working because of false E11" (This error was introduced in version xx25425)

And this is the very reason one shouldn't simply update to latest. because if you were operating a parallel or 3-p system and updated to 425 "just because", you might have experienced a bad time until 428.

So with all that said, it would seem I need 456. Available versions are 433, 459 and 465. 433 too low obviously, 459 would be ok, changelog between 459 and 465 shows a nice feature "display the remaining waiting time before connecting to grid and also to display the cause of a grid rejection" on the other hand it also shows "A lot of under the hood changes." while I'm sure the latter is good for future enhancements, it also tends to introduce new errors. And indeed, 461/462/463 seem a little bit on the stabilization side. As there also are no critical bugfixes between 459 and 465, the conservative choice is on.

So 459 it is! For me.

In the current multiplus firmware, there is the ability to set Battery priority until a set of conditions are met. I am trying to set it so that draws under 1500w are from the battery (and inverter) and if the load goes higher, switch to mains. This is to support an air conditioner switching on. (12v/3000/230v). I realize if I lose mains, I will have an overload, but that's an issue to solve for a different day.

For now, if I try this, I go into overload, ripple and the inverter switches off. I have it set to switch at 1500w, no delay. I've switched off the other conditions (soc, voltage). Has anyone tested this, and do I have something misconfigured or misunderstood?

Hi,

The system will consist of 3 separate battery banks, each with a solar MPPT connected and all wired to a Venus GX for monitoring.

Is it possible to monitor the temperature for each battery bank, the Venus only has 2 temp inputs so I was thinking of using a Smart Battery Sense on each battery. The end user will then pull this data from the Venus using Modbus using their own telemetry.

Is this possible?