Hi,

VE.Bus Smart Dongle produce page states:

Secondly it can work as a Voltage- and Temperature-sense device for the inverter/charger. This works with all models, and is especially useful in combination with the MultiPlus-II, as it does not have on-board terminals for Voltage- and Temperature sense wiring

... on-line manual:

On MultiPlus-II models the dongle is, at present, the only way to add an “on-battery” sensing capability.

and:

Likewise, the dongle also monitors VE.Bus communication in order to discover if a Venus-device is supplying the Multi with battery voltage and temperature data. It takes around 4 minutes after power on, or reset, before the dongle decides whether or not to transmit the battery voltage and temperature.

Now, I have MultiPlus II (that is without battery temperature sense capability) and GCCX Venus device. From what I read, I expect that dongle would provide battery temperature data (since there is none present on the bus), but it seems that it does not! When I do dbus-spy there is no signs of battery temperature at all.

I am confused. It seems that VE.Bus Smart Dongle is practically useless (it just provides battery voltage and temperature over bluetooth) when there is GCCX Venus device is present on the bus... or am I wrong. My plan was that VE.Bus Smart Dongle would provide battery temperature to the system.

Thanks,

Matej

Hello,

we have installed a CCGX on a off-grid site with a router Dlink DWR921. The two devices are connected with ethernet cable.

The router works with DHCP and CCGX is configured to obtain an automatic IP.

We can see that the router give an IP on the network and recognize the CCGX , the CCGX try to obtain this adress but doesn't achieve and stay unlogged.

We have tried to give a static IP but the CCGX doesn't accept it.

Do you have any idea to resolve this issue?

Sorry for my English!

Thanks.

On a motorhome with each string with varying shading throughout the day from air conditioners and such on the roof. Each string is five 100w panels. Currently Midnight Solar Classic 150.

Any advantage to changing to 3 Victron controllers?

I have been installing Solar on a 5th wheel which consist to 6 x 175 watt panel, into a Victron MPPT 100/50 Charge controller charging. 4x6 interstate GC batteries rated at 420 AH @20. I have set the Charge to Battery Voltage 12

Max Charge Current CC/10 which is 42 Amps

Absorpon Voltage is 15.3V

Float Voltage is 13.4

Equalization Voltage is 15.6 Volts

All settings are from the INTERSTATE BATTERY Recommendations.

For the BMV-712 Setting I'm Using

Battery Capacity 420

Charge Voltage ? ( I'm reading that it should be a few % below the Absorption Voltage say 15V)

Tail Current 4% (Which I'm assuming would be 16.8 Amps)

Charged Detection Time 3m

Peukert exponent 1.25

Charge Efficency Factor 80%

Current Threshold .10A

Time-to-go average period 3m

Does this look right?

Good morning All

I have seen that this error has appeared quite a few times with other guys but with no definitive answers about what to look for. I installed the inverter this weekend and switched it on last night. About 6 hours after switching it on it switched off AC1 with the VE Bus error 11.

I have just updated my Venus device to be able to get the detailed log/code of the error and this is what I got.

Does anyone have any more info with specific items that I could look out for.

Thank you in advance

I am currently trying to setup a Multiplus, Victron Lithium batterys, VE.BUS BMS, and a BMV712 in my RV. I have previously had a dc-dc charger and solar charger installed that does have custom settings so i can program them for the lithium battery. I do not want to have the expense of replacing them with victron chargers at this time. Can i use a battery protect inline between the chargers and the battery to stop charging in the case of over voltage? Would this battery protect be trigger with the VE.Bus BMS or for the BMV712 relay?

I have set up a 3 phase ESS system in Australia with 3 x Multigrid 24V 3000s and all works Ok except the house is 100m away from the install and has an MEN connection at its own distribution board, this is causing an error 11 fault. This is quite a common way to do installations in Australia. Is there a Firmware update to fix this one or any other way to resolve it?

We are considering upgrading to Lithium and here is what we think we know based on the settings recommended by the manufacturer... We would set the absorption volts to 14.4 and the max time to 1.5 hours (because starting volts would be 13.6 which would result in 1/6th of 1.5 or 15 min). Float would be 13.6.

Our question is this... if the volts on lithium are generally a constant 13.6 until almost charged or almost discharged, and the controller is on float volts of 13.6, how do we utilize the excess solar to run our electric fridge and other loads during the day? Won't they run off the battery and the solar won't add to the battery because the volts are constant? Hope this makes sense and someone can tell me where my gap in knowledge is!

Thanks!

As discussed in the below post I am working on a project to measure excess, available PV power and use that power to automatically control a load.

https://community.victronenergy.com/questions/6806/can-the-ccgx-activate-relay-for-hot-water-heater-w.html

I now have a working prototype using a PLC, with a Ladder program, that performs this function. The key is installing an Irradiance/Temperature Sensor at the PV array. The one I used is an Si-I-420TC-T made by Mencke & Tegtmeyer GmbH. Link to the sensor is below:

https://www.imt-solar.com/products/solar-irradiance-sensor/si-sensor/

I am still working on the Project's documentation, so I am including a wiring diagram and an Excel spreadsheet which demonstrates the calculation to compute available excess power.

Look forward to the conversation,

Pat

BRX_Wiring_Diagram_Rev01.pdf

powercalc.zip

I am assuming it is not possible with current hardware - but while brainstorming with several other Victron users we were wishing that the AC2 output of a Multi or Quattro could be used for diversion loads to put excess solar power to use automatically.

I know you can accomplish this already with the relay output on the BMV and an external relay - but it would be really convenient in many installations if the internal AC2 relay could handle the job.

Might this ever be possible? Is it perhaps possible on current hardware with a firmware update?

Hi,

I have installed a grid-connected PV system (but not feeding back in to the grid), with battery storage and ESS, for a mix of back-up and self-consumption.

I am using multiple instances of the Programmable Relay Assistant to control water heating via the MultiPlus' secondary programmable relay K1, by:

• turning it on when insolation rises to a certain level (measured via a small PV panel's output current feeding a Schmidt trigger, which in turn drives a MultiPlus Aux input) AND AC load below a certain level AND SOC above a certain level, and
• turning it off when any one of the three parameters reverses to a lower / higher value (i.e. with hysteresis).

One particular question is about AND / OR logic - it appears to me that:

1. when more than one condition is set in the one assistant, then it uses AND logic, and
2. to implement OR logic, it is necessary to use multiple instances, each with one condition.

Can anyone confirm from experience or product info', that these are correct?

I understand that the order the Assistants are listed in, in VE Configure, affects how they operate, and that those lower in the list 'override' those higher in the list. I found that my system works approximately as I want when the 'switch on' Assistant is at the top of the list. If I move it to the bottom of the list however, then the K1 relay appears to remain on permanently, irrespective of inputs, and I don't know why that should be.

I'd be grateful for any more specific / exact information about how the ordering of the Assistants functions.

When I tested control using either one of the Aux 1 input or AC load (one at a time only), they behaved perfectly, including with the delay times. However, when I combined the two in one 'turn-on' Assistant, it then appeared to ignore the delay times, and switch on instantly when both conditions were met. Any ideas about what might have caused that?

Finally, with all three inputs combined in one 'turn-on' assistant, with 'AC load lower than 1250W', I had it switching on when AC load was still around 2500W, so either it is not actually AND-ing the inputs, or the parameter is not working correctly.

Does anyone have information about exactly what the 'AC load' parameter reads?

Thanks in advance!

When AC coupling with a 10KVA Quattro and a 8.2kw Fronius with BYD Batteries we are getting systems that are Overloading and shutting down frequently especially on hot days. Is there anyway that the Quattro could back of the Fronius inverters with the frequency shift when it senses it is going into overload or high temperature

For the 500amp shunt that comes with the BMV-712 what is the terminal/lug size? I couldn't find it on the specifications sheet. I'm assuming it's either M10 or M8.

Hi, I had just installed the easy, and doing everything that is said in the videos, but I could not connect for configuring and I don't know which is the default configuration. Please help.

I've looked for other answers, but not found something that answers the specifics of below

For background and context to the questions.

I have an old ship that takes 3 phase shore power and internal wiring / consumption across all 3 phases. The current shore power is 16amp at 400v (Sweden) giving peak usage of 11Kw across all three phases.

The system is all 240v on the consumption side baring an achor winch and old electric heating (not used) at 400v. There is a 6kw sh*ty 3 phase 6kw generator (will be replaced).

The DC side is 24v, with a 100 amp engine alternator for starter and house battery charging, plus an old Victron Skylla 24v mains charger. At the moment the house batteries are 200AH (5ish Kwh).

I cannot afford 3 multiplus' in one purchase, but I need to install at least one invertor to fix the issue that I have no power when the shore power is removed (existing inverter not working and modified sinewave, installed by last owner).

Off shore power I will need max 9kw (3kw per phase) across all phases for brief periods with average of about 2kw peak for induction hob and oven

So, the questions are...

Can I install a single multiplus to power all phases as a short term solution until I can purchase 3?

Can I install a multiplus to power just a single phase when not on shore power?

If I have 3000/24 on a single phase, can I use self consumption from the batteries even if I am plugged into shore power for the phase in question? I guess this is phase compensation, but with only one phase?

The 24v 3000VA multi is technically 2400w, if I set it to disconnect none-essential loads when not on shore power, I can keep the usage below 2400 peaks, but I'm kind of on the border of needing the 5000VA version. IS the 5000VA overkill rather than managing usage instead?

If I put in more batteries to spread the current draw over say 10 x 100AH 12v which would give 24v 500AH supply, with peak draw of 500amps at 1C and I would be peaking at approximately 400amps to deliver 9Kw, is this considered too much draw for 24v? The batteries will only be 1.5m cable run from the multis and the draw would be 130amps ish per multi. The average draw will be in the 30 - 50 amp range when in use

The ship systems are all 24v, but would it be best to consider 48v storage and then use 48v to 24v converters to power the ship systems and install a 24v to 48v battery charger to draw power from the engine alternator?

Sorry, for a long post, but I am trying to decide the best solution, so I can begin to install :)

Look forward to your replies

Craig

I recently installed a BMV-712 on a 24v system (four 6v wired in series) with a 224AH capacity. For some reason, the display (on both the unit and on my phone using the app) shows only 7.1v which seems to be for only one battery of the series. I connected the wire for the BMV (the temp sensor and power wire) to the + terminal on the last battery in the series. Could this be the issue? The rest of the monitor seems to be working fine? This discrepancy appears both in the settings and the display of battery voltage.

Here’s a link to a screenshot video I took of my VictronConnect app.

https://youtu.be/N6MI9vRzVyQ

I have a SmartSolar MPPT 150/45. It is connected to (6) 100 watt 12v solar panels on my RV. I have the panels in two paralleled sets of three in series. The first day it was pretty consistent at 250 watts because it was a cloudy/gloomy day. The next day was intermittent clouds but mainly sunny. But my solar output was all over the place which makes me think I’m doing something wrong. Here are my battery settings:

12v; 43a max; 14.4 v absorption; 2 hr max; 13.5v float, 13.5v equilazation with automatic turned off; and -30.00mV/°C temp compensation. (All per my battery manufacture recommendation... Trojan T-105 AGM Deep Cycle... (4) 6v batteries in 12v series parallel)

I left every other setting alone.

So is that normal or am I doing something wrong?

Hi all,

We have a EFOY Pro fuel cell and we are searching for a developer who can impleement the unit to the Victron Remote Monitoring systems such as Venos GX, Octo GX and also the Color Control GX. Also it would be great to see the unit via the Victron VRM system. Do you have any contacts or advises how to get this done?

The fuel cells have RS232 cleartext and RS232 Modbus RTU protocols.

Thanks and best regards
Stephan

We studied the manuals and spoke to our in country distributors in South Africa and we are getting conflicting messages and need to get to the bottom of this.

We in the process of implementing 2 x Quattro 48/15000 in parallel per phase i.e. 6 in total. Reading the manual it states that if the AC voltage on AC-in-1 or AC-in-2 is switched through, but the load demands more current than the mains can supply, the inverter will be switched on to supply additional current.

Which refers to the PowerAssist where the Quattro can together with a maximum input current of 100A + 65A from the inverter give us 165A (15kVA model) or in our case parallel connected Victrons, we will get 330 Amps per phase (2 x 100a AC Input + 2 x 65A Inverter).

What we can't get a definite answer on, is if this is just for a "rush-in" situation or can it be for a longer period, as we do have sometimes on this site more than a 200A requirement for periods of one hour.

The one solution is we can purchase another 3 Victrons, one per phase but for the short periods it will be in use it is not worth it.

Looking forward to your response.

The cable that is shipped with the dongle, B+ (red) and B-(Black) is assumedly to provide power to the unit? If I have a battery bank of 8, 2 x 4 = 48V, do I connect the unit to one specific battery (12v) or over the 48V bank?