I'm trying to use a Goal Zero 25 am Fast charger as the PV input to charged 3 connected 100amp AGM batteries connected in parallel. For some reason, when I use the Goal Zero fast charger, the only thing that shows up on the victron app under Solar is 15.24V (voltage) and 0.0 A (current) and under battery it says 12.70V (voltage) and 0.0A (Current).

Why isn't this setup working?

I tested the same setup but connected a 100 W solar panel to the PV input and the app showed 62 W from solar and 59 W charging the AGMs.

Thanks for any help here.

Hello,

Is it possible to use the VE. Can Resistive Tank Sender Adapter in a system using a BYD battery if there is a Venus GX in the system?

Also has the second relay on the Venus been made available for use yet?

Thanks

Hallo, ich habe nach meiner Anmeldung für die App keine Rückmeldung erhalten.

isolated system with quattro8k, AC and DC coupled chargers.freq shifting from 50.5-52.5hz,off at 53hz.(SMA inverters).at end of day freq stays stuck at 52.7hz through the night, failing to reset to 50hz, battery voltage is now 49,1V 82% SOC. turning on the generator resets the freq, but this is no real solution.suggestions?

[image]

Good day everyone, am trying to limit my cabling length runs on a proposed installation, so i thought instead of getting GEN for AC1 In and GRID for AC2 In ..

instead get phase one Live and phase two Live from the output of a changeover to feed Quattro AC 1 In and AC2 In respectively and save the cost of running multiple cables.

Please advice. being racking my brain all day long.

What is the Modbus TCP unit ID for the Multiplus II GX ?

BR.

Morten

Recently added a 100AH Battleborn LiPo4 battery to my camper. Purchased a battery/victron BMV-712Smart package. wired into P/N busbars with the shunt between N busbar and the battery negative. The 712 monitor seems to work fine when not connected to shore power, but gradually reports lower SOC until SOC is now 0%, while the battery voltage continues to be above 13.60.

Using the MultiPlus on a small scale Solar installation.

Configured in inverter mode only - operating with 12V (nominal) battery input and AC output to run LED lighting.

It's been operating for 4 months without problem.

The unit then failed. There isn't any LED indication or AC output.

The unit has been left switched off for 30 minutes in an attempt to 'reset' it but is still unresponsive.

The internal fuse is intact and the manual doesn't suggest there is a user replaceable fuse in the enclosure.

I am very disappointed with this early failure. And espectially given the unit isn't operating anywhere close to it's rated maximum power output or on a continuous basis.

Are there any more diagnostic steps that can be run or is this a write-off of almost new equipment?

BMV 712, CCGX, Multiplus, and my personal multimeter all have the Tesla battery at 24.65V. Yet the BMV 712, CCGX, and Multiplus all report the battery at 65-68%. Why?

Note: Happens both in solar charging and in grid charging. I have the Multiplus Absorption=24.6V, Float=24.5V, Charge Current=70A, Repeated Absorption Time=0.25hr, Repeated Absorption Interval=45 days, Max Absorption Time=1hr.

Please i need an explanation as to what VE.bus inverter state "255" mean and also what MPPT state "131" is?

We have a 3ph set up with MP2s with an ESS. We have the system working with a changeover switch, the system operates without issues bypassing the essential loads/charging the ESS and powering the loads from the Grid. We have only run the system powering the essential loads from the ESS for 10mins at a time, it operates as expected during those tests. The 1st incident after 7 days of faultless operation and second incident after 11 days of faultless operation, Relay Test Fault. The system appears to auto run a random relay test. It fails the test and switches off, Error 11. It appears that they were #45 0x8200024 (Error Occurred GND Relay Error) and #50 0x800002 Relay Test OK PE2 Closed Error (but states Relay Test Fault in Alarm Log) errors. These errors ocur out of office hours and no one is there to reset right away. When staff return and reset system it operates. Elec Eng is sure N and E are bonded correctly and seperate between essential and non-essential boards. Without this random test we would be fine. Can we stop this test from running?

Six months ago, following multiple user complaints, I posted this, outlining how Victron MPPT controllers consistently fail to fully charge batteries in intermittent sun, due to a bug in their "smart" Absorption timer algorithm.

"Fast" forward to last week, and finally a supposed solution is given in terms of an update to Firmware 1.42.

Except it's not.

[image]

[image]

Nothing has changed with v1.42 at all. The controller is still resetting to its shortest absorption period every time a cloud goes over, and dropping to float when the batteries are desperate for charge. And yes - I manually ensured the battery V was under 12V every sunrise, and I did isolate all loads during the day for these tests - that difference in Amps between the app and the Trimetric is just Victron's apparently poor accuracy (another problem in its own right).


This isn't some obscure, niche problem. This is core function - reliably controlling the absorption stage length is the fundamental point of a controller. It's been reported again, and again, and again, and again, and again, and again. We have a suspected case where it's ruined someone's batteries as a result. For it to take six months for this to be addressed, while adding pointless gimmick charts to the app instead, was poor enough. For it to now turn out to be a non-solution is unacceptable.

I'm addressing this squarely at you @mvader (Victron Energy Staff). You promised this was being fixed when I first bought it up. Your response here determines whether I take this unit back for a refund.

Hi people, I installed a Multiplus II 48/3000/35 with a 2.4kw pylontech battery and a smart solar charger fed by 3.2kwh of PV panels. During installation I first had the PV to Smart Solar charger to Pylontech batteries connected and the battery was charged thru the expected cycle of Bulk then Absorption and finally Float. This cycle repeated for many days and all seemed in order. Once the Multiplus was connected the charging cycle has changed to Bulk and then Absorption. It never reaches float any more, does not matter which charging MODE setting in ESS I choose. I also notice from the downloaded .xls kwh files that the power delivered/fed from the battery is about 18% of the power fed to the battery either via grid or PV. not sure if this is normal. I know this is a brief explanation, happy to supply more detail if required.

Thanks

My multiplus compact is going straight to passthrough instead of going to charge mode. The batteries are not fully charged, so I think it should go to bulk. If I reset it,it does goes to bulk.

Hello what size altenators are required to supply the inverter with enough power. We have 2 1000cca batteries.

Hi,

Are the new smart Phoenix inverters compatible with the ccgx via ve.direct. Will the ccgx display the same as the Multiplus?

Regards

Damon

System:

Color Control GX (2.33)

BMV-712 Smart (connected to GX via VE.Direct1) (4.01) Bluetooth network for MPPT Charger

MultiPlus Compact 12/2000/80-50 120V (connected to GX via ethernet) (430)

SmartSolar Charger MPPT 150/35 (connected to GX via VE.Direct2) (1.42 - updated on Wednesday from 1.39) Bluetooth network with BMV

3 Renogy 100 AH Lithium batteries in parallel

Was 4, now 5 Renogy 100 Watt Mono Panels (VOC: 21.6V, ISC 6.24A) 5th panel added today for testing. Wired in series.

BMV is autoselected as the Battery Monitor on the CCGX and

10 Gauge solar cables to SmartSolar MPPT 150/35 from the panels

6 (edit - originally said 4) Gauge wire between MPPT and batteries - 6.5 feet. Shutoff on positive and buss bar between them.

4/0 wire from batteries to MultiPlus 14' away. Uses same bus bar as the MPPT.

Salt Lake City, UT area if that matters.

Question/Issue:

I am measuring 101.1 Volts and 5.1 Amps on the wires coming from the solar panels. This was done with the wires removed from the MPPT and measuring at the point where they would be connected.

The MPPT controller is only showing about 1/2 the amps and only about 90% of the volts (see screen shots).

Why would there be that big of discrepancy?

I have had this problem for a few weeks now. With 4 x 100 panels I was only getting a max of 320 Watts according to history - for the most part it was down in the low 200's. This is with 90-100F outside temps in full sunlight around 1pm.

I added a fifth panel for testing to see if it made any difference.

I've seen other posts here about solar output only being about 1/2 of expected, but no real solution. I've checked the wiring, polarity, measured everywhere I could,

Any ideas?

Screen shots:

[image]

[image]

[image]

I hawe alarm "lov battery voltage" on 51V check on battery. In manual i read 38V. Instalation don't start. What i can do? Instalation work when sun light and voltage go to 53V with mppt 250/60 smart solar controller. Ewrything its new.

So, after this topic coming up in multiple different threads recently, @Leslieanne proposed a theory as to why so many users are finding their Smart/Blue Solar units are only doing ~1hr absorptions, despite having quite a low battery voltage at sun up.

In short, the theory is that if you have significant enough shading on your panels at some point during the bulk stage, the panel voltage drops below cutoff, as if encountering 'sundown'. When the shading is removed, it goes through another 'sunrise' and recalculates the absorption time, using the below table...but with a new, much higher battery voltage - resulting in drastically shortened absorb phases.

[image]

Considering I personally run float=absorb, I've never actually looked at my 'absorb' times. So I decided to test this. For the last 5 days, I've run my batteries (370Ah) down to 30% each night to guarantee consistently low startup voltage, then isolated any loads all the way until the next sundown (ie no power draw while charging). Whilst it's meant a week of cold meals (which have not impressed the wife) this has guaranteed a consistent test environment, in which the controller SHOULD provide the full max absorb time - set at 6 hrs.

And it did! Well, at first:

[image]

[image]

Left to right, Days 1 to 3 were slightly cloudy but steadily clearing, hence the increasing yield. Day 3 in particular was solid sun and I was able to get a full 110% overcharge and even a brief equalization, completely restoring 100% charge. Importantly, each day correctly ran the max absorb time. The fun begins on day 4.

Being a sunny day, I had to resort to 'simulated' cloud i.e driving under a roof. Once the battery V reached 13v, I did one short tunnel pass and noted that sure enough, the controller drops out of charge and the blue 'bulk' light flashes, just like after sundown. It only takes a few seconds of sun loss, and sure enough....

[image]

As shown, the controller reset and recalculated a 1 hr absorb, based on a 'startup' voltage of 13.0v. Two further things to note here

Firstly, the total yield in this case has remained more or less the same , due to my float v = absorb v. Had this not been the case, by the end of the week I would have certainly totally killed the batteries.

Secondly this was with 70V panels on 12V batteries. With more typical 12/24V, I suspect you could trigger this with even cloud or treeshade.

As it happens, I tested this on the last day anyway. A storm front blew over and we had a good 5 minutes of twilight under some good Cb. Quick check to the meter and yep - the Victron dropped out at 12.4v, panel V fluctuating around 15-20v. Lo and behold, the result - a 1/3 absorb.

[image]

So, the conclusion?

These MPPT units are undeniably vulnerable to spurious absorption calculation, but @Solvan s theory that its due to inaccuracy in the units measurements is incorrect; they are accurate enough for their purpose, the problem is their own calculation algorithm.

Regardless of panel voltage, even a few seconds of major solar interruption by common events (driving through shade, sail blocking, dark clouds) will entirely disrupt this algorithm. This would be especially exacerbated if you were running a load at time of solar interruption, dragging V down further and likely cutting the most critical phase of charge by 80%. If you're not actively watching your SoC, or at least your end amps during float, this could easily result in chronic cumulative undercharging.

Victron needs to sort this out - this has the potential to damage customers' batteries. Its a very simple matter of extending the time required for low panel voltage to trigger a controller shutdown, from a few seconds to maybe an hour or so.

( Or, yknow - having a manual absorption configuration like every other controller on the market...)

@mvader (Victron Energy Staff)
@Guy Stewart (Victron Energy Staff)
@lnanne
@JasonTav
@Troy

Hey guys I don't want to blow anything up but I got a hold of a 12V Lithium Phosphate battery along with a SmartSolar 75/15. I also have a separate 24V AGM battery bank from a another SmartSolar 75/15. I only have 2x 265 Solarworld 24V Panels running in parallel (more amps). Currently I'm swapping PV connections every other few days. My question is what will happen if I made a Y connector for 2 solar charge controllers running off the same PV. Is that even possible? I don't want to separate the 2 solar panels just to adjust to one battery bank system. Thanks in advance for the much needed help! Take care all!

I'm setting up my multiplus compact to work with my Renogy lithium phosphate batteries. When I select the battery tipe of battery to lithium is telling me that I need Assistant. What is that? Which one do I use?

I have just added a VE.Bus Smart Dongle to my MutliPlus Compact in my caravan, and the remote switch (simple 3-way toggle) will not work (ie won't turn the MultiPlus off) while the dongle is connected. If I remove the RJ45 from the dongle it works correctly.

It seems the Smart Dongle is over-riding the remote input. I know I can do remote control from VictronConnect but that's not as convenient as flicking a switch.

DS1 and DS2 are off (as they should be for the remote switch to work). Firmware is 2606430.

Am I missing something?

Will this still be an issue if I replace the 3-way switch with a Digital Multi Control?

Any help appreciated.

Phil

I have some 24v victron smart lifepo4 batteries to connect in series, i see in the manual it states they should be charged to 28.4 for volts for several hours just wondering how people are doing this? I have various chargers but i dont think i have one with a settable output voltage unless it has cell info e.g i have junsi smart chargers where it would need to see all the individual cell voltages i dont think this will be possible with victrons batteries. Any tips? Thanks Jack

I have a pair of Quattro 8k in parallel operation. They have started making a loud buzz/rattle sound. I've isolated the mains inputs and outputs but it still does it so can't be any bad load/poor Mains etc.

It's really loud and distracting when trying to sleep.

I've attached a sound clip of it.

Anyone got any ideas?

ThanksVID_20190722_210857.mp4

Ceri

Hi,

I'm looking to install 3xQuattros för three phase operation and with it a CCGX.

I also have an Atlas Copco backup generator (20kVA) with a QC1011 controlunit.

There is an option for auto start and stop the generator (Max 30VDC) but it is on two separate connections. Would this work with the CCGX?

If so, how would one connect it?

Kind Regards

Twice now I have experienced a negative AC input. I'm sure it is happening more frequently and has just gone unnoticed. I have two multiplus 24/3000 inverters in parallel. I have defined two AC inputs. Shore power is connected to the master AC input. When there is a load (eg, Air Conditioner, water heater), I'm seeing the AC input go negative, a significant drain on my batteries which appear to be supplying power for both the AC Output and the suspicious AC Input (feedback???). After the load drops, the system appears to return to normal and recharges the battery bank. I have no assistants loaded and have not defined a country code for feeding back to the grid. How can this be???

[image]

Hi

I have a multiplus compact 12/1600 in my caravan and wanted to use the remote switch capability, however I can not get this to work! I had attached a cable to the ground (middle) and the third connection (on) with an on/off switch but nothing happens.

Help please

Mein MTTP 75/15 zeigt am PV Eingang nur noch 12,3 Volt an.

Am Kabel von der PV messe ich direkt 19,1 V. siehe auch Bilder im Anhang.

Hat jetzt ca. 1Jahr hervorragend geladen. Jetzt geht nix mehr.

[image]

[image]

[image]

[image]