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?

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!

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

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?

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.

I have a centuar 12 VDC / 40A charger with a house battery bank of 300 Ah. When I start my generator the charger goes to approximately 50A and will continue to charge for approximately 30 - 60 minutes. The current at that time is approximately 35 A and than the charger switches to float prematurely in my mind. Batteries are not fully charged. I have checked and the charger did not seem too hot and the fans were still running. Is this the expected behavior? Thanks Rob.

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.

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

Hello,

I have a customer who would like to monitor multiple small PV installations using AC current sensors. My questions are:

1. Can multiple sensors be used in 1 installation?

2. What is the max length of cable run for these?

Many thanks

Hello,

Our lineup is 2 pcs Smartsolar 100/20 Mppt Trackers. 4pcs Astronergy 285W solarpanels (connected 2pcs series for each tracker). Multiplus 24/3000. 2pcs Ultracell 12V 200Ah (connected in 24V). Venus GX.

Mppt are connected in parallel. And each panel set is installed in different directions. Because target is floating sauna and direction isn't stable ;)

Last autumn everything works fine until dark winter season comes in Finland. And now when we have sun mppt's are doing something weird. They dont charge at all even vrm solar voltage is high on each tracker. (50-65V). Only some watts blinking sometimes and it seems current is going negative sometimes.

Firmwares are updated.

It is possible that it is firmware problem or what it is?

Mppts are connected to the venus with ve.direct cables. And i even tried to fix problem by disconnecting other mppt from the system and making them work independently. Problem stays.

Our other solar destinations does not have any problems. And we have enough sun to charge.

There is some screenshots from VRM.

Thank you for your 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

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.

Hi

How can I display the critical loads and ac loads like in the pic below (pic from another user question)

I have Multi 24:3000 don’t have ess installed yet

I can not select grid code AUS/NZ grid code and have lom device,how can I select au/nz grid code or do I have to select other not complaint

Thanks

@Matthijs @Guy Stewart

One of my sites is a 3 phase system with 3 multiplus 5kVA and Fronius Symo 12.5. Last week the system stopped accepting the 3 phase generator which was working fine two days before. No physical electrical changes have been made.

Would a 3 phase multiplus system ever reconfigure itself to cause a phase rotation issue? The system is set up to accept a "dirty power" generator which was working fine on tuesday, then yesterday the system rejected the generator completely. No-one changed any wiring. Today I rotated 2 phases then the system accepted the generator again.

Is there any possibility at all that the Victron system can change its own phase rotation configuration? A notable event is that yesterday the L1 phase from grid dropped off, L2 and L3 remained on.

Any one with experience on this?

Hello,

I am building a 24v Victron system to go in an expedition vehicle.

Currently I have (For testing) 2 x 95ah 12v batteries lead acid type

CCGX

BMV712

Multiplus (Older chip updated to firmware with Assistants)

My question is - The voltage drop overnight with a 100ma load (BMV and CCGX) above is not reflected in the SOC. The capacity in the BMV is set to 85ah and all settings are correct for the battery type, all connections are checked. Shunt is correctly wired.

Why is the SOC not dropping in line with the voltage?

Many thanks

I have connected a MultiPlus-II connected

DC

180Ah 48V Batteries

SmartSolar MPPT 250/85

BMV-712 Smart

AC in to Grid

AC out not connected (at this moment) because i just want to feed it.

I configured in ESS to alway kee Batteries charged an a charge limit to 50Watt.

Why is AC Out consuming 35W?

here some more pictures:

Any advice?

Thanks a lot!

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

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 there,

We have an install where the customers' lights are flickering when loads turn on/off as well as being noticeably dimmer when large loads are running. The system is a Victron Multiplus 5kVA with SmartSolar 250V/85A and 400Ah of Carbon Lead batteries.

I have had Fronius AC-Coupled systems with light issues, but never DC-coupled. There are LED, fluoro and incandescent lights in different parts of the house and all react similarly; anyone knows what could be causing this?

kind regards

Dean

Hello,

I am using the street light function on my 100/20 controller. The setup is for 24 volt.The night detection voltage is set to 8 volts and day at 10 volts. The light will not come on till it's pitch black outside. Now I am thinking these are the setting for a 12 volt system. Any thoughts on this?

Thanks,

Markus W.