Am I correct that I cant use the Victron Connect Windows app with my Victron Bluetooth enabled devices? Why is that? My laptop can pair with my BMS and charge controllers but they dont show up in the Windows app.

What is the proper size cable from my shore power inlet to my Multiplus 12/3000/120? Is 6/3 overkill?

Hello,

Thanks,

Stuart

Hi all,

My new second hand boat I has 2 x 50W solar panels connected to the service battery bank through a 75/15 MPPT Solar Controller. There is also an MPPT Monitor and a BWV700 battery monitor, both are installed and working. Everything works well. Now I found a new unused Bluetooth Smart Dongle. I tried to plug it to the MPPT controller, but the Ve.Direct socket is already being used (I suppose by the MPPT Monitor). Where does the Dongle fit in this system? Where/how do I connect it?

I've got a 12v 320Ah Narada Lead Carbon battery bank, a Multiplus 1200/12/50 and 3 SmartSolar MPPT 75/15's connected to 3 separate solar arrays.

The problem I'm having is the MPPT controllers tripping over each other going into float WAY too early. So on the daily chart I'll have one controller yielding as much as 1300Wh while the other two will yield as little as 200Wh each. At the end of the day the battery is not fully charged either.

The dominant controller can be any of the controllers on any given day. The wiring and settings are the same for all three controllers. I guess it just a software race condition which one detects the 1A float first. As soon as is does that 1A load goes to the remain controllers.

Is it possible to have them share better. Does the BMV or Smart Sense Synchronise them at all. As it is they are operating at about 30% efficiency once two drop out.

Seems that only one MPPT controller can be the only charge source in the circuit. Otherwise once any one hits the 1A float threshold it go to sleep and doesn't wake up again. Leaving just one controller to do all the work and the battery no where near charged.

The situation is exacerbated as the Muliplus charger starts up when the generator is fired up. All the MPPT go to sleep because the generator is providing all the charge current. Then when it is turned off often only one charge controller comes back to charge and the other two stay on float even though the battery might only be 30% charged because the float voltage being reached does not wake them all up.

These MPPT charge controllers do not play at all well with other charge sources. Including their own kind. Is there any way to have them act as a simple power supply? That is just providing a voltage to battery and allowing the battery to simply absorb what it can? Or maybe get rid of the 1A threshold or have a timer that checks periodically if the battery can now accept greater than 1A and go back to absorption.

Basically modify the algorithm somehow so they're get back to work when they can. At the moment it's like having an employee that gets things done in the morning then goes to sleep and doesn't bother checking if more work has arrived because the other bloke is doing it all by himself and struggling at it as a result.

Seems theses things are too smart for their own goodand as a result are constantly tripping over each other. After which they don't get up and back to work again for the rest of the day! If it was an employee you'd fire them for not being team players! Lol

Is it possible for me to just move the charge leads from the battery connector to the output connector? If the MPPT can output 15A at say the float setpoint voltage to the output without a battery in the battery connection then that would be better charge controller than all the current "smarts" before the battery connection terminals!

Any solution would be appreciated.

Cheers,

Troy

I have MPPT 150/85 with Inverter Quattro 8KVA and SuperCap batt of 7.1KVA. System not setup to put power back into “Grid”. ESS is enable and setup to only run on “Grid” when batt is depleted. During day the batt charges to 100% and at night the batt is drained until 5% is left resulting in switching to “Grid”. Next morning the PV’s kicks in charging the batt. Once SuperCap batt is on about 85% the Grid will be dropped and system switches to solar power. My question: I would like my system to switch off Grid when batt is charged up to 30%. Reason being is that I have sufficient PV power to both run the household and charge the batt at the same time. My installer informed me that due to the way a SuperCap batt operates it is not yet possible to modify switch over setting. Regards Danie

Les batteries son chargées avec des panneaux photovoltaïques 10kwc à l'aide d'un mppt 250/100A tr

Hi Im after a list of brands that work with frequency shift to reduce output. Ive used fronius before that works well and ive heard SMA will aslo work, im wondering what other brands people have had success using, in particular im trying to find out if anyone has managed to use a Solis inverter as cost wise this would be great. Thanks

Hi

I'm having problems setting the Time and Date correctly on the Venus GX, every time I set the time and date it reverts back to a time about 3 months ago virtually instantly. actual time is 2019-11-12 20:34 (approx)

I know its supposed to get the time from the internet but the time is totally wrong.

If I reboot, the time continues to be about 3 months behind but is increasing.

i have tried setting this in SSH with the date command, and hwclock command, but it always reverts back and I don't know what the ntp settings are.

Any ideas would be great

Thanks

Phil.

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I have someone asking us to validate whether their non-Victron charger/inverter is treating the batteries well. All I could think of was strapping on a BMV-702 with temperature sensor and plumbing that into a Venus device (maybe a VenusPi) to log the battery data to VRM for a period.

Will the BMV work with Venus and VRM without having a Phoenix or Multi or Quattro or MPPT in the mix?

Off grid system.
2 x 100/50 MPPT Blue Solar (Plan is to put 4 x 275/300W solar panels on each)

1 x 1500w generic inverter to 230V 24V system.

Main loads are fridge, small stereo system, lights (led bulbs) and sometimes small kitchen appliances (mixer).

Looking to upgrade battery banks. We are looking at a 6 x 220Ah batteries.

The problem is we don't know witch type of batteries to choose, AGM or GEL.
In the future we may get higher power inverter.

Does this system require AGM because of the charging / discharging currents? We are leaning towards the GEL because of longer life. Do the GEL batteries have temperature above witch they shouldn't be charged?

Hello,

I'm planning an off-grid installation with four solar panels, a SmartSolar MPPT 100/20 (48V) and a MultiPlus II 48/3000/35-32.

I'm wondering how I could monitor my system and I see (at least) two options:

1) Raspberry py

In this case I'd need to get:

• UTP cable + MK3-USB interface to connect MP II to the Raspy
• VE.direct cable + VE.direct to USB interface to connect the MPPT to the Raspy

Is that right? Or can I connect the MPPT directly to the MP II? In the latter case I don't need to buy VE.direct to USB interface

2) MultiPlus-II GX 48/3000/35-32

In this case I'd need to get only:

• VE.direct cable from MPPT to MP II GX.

Is that right? As MP II GX has only one VE.direct port, is there any other way to connect MPPTs to it, in case I will expand my system?

Do I really need MK3-USB interface with MP II GX? What's the purpose of USB port??

Which option do you suggest?

Sorry for the large amount of questions and thanks in advance for helping me to have clear ideas :-)

Matteo

I moved my geysers and laundry appliances onto as yet unused AC-Out-2 on my Multiplus today in the hope that we could make better use of massive amounts of wasted solar I have because my critical loads are too small.

The MP2 manual lead me to believe that battery power would not be used to support loads on AC-Out-2:

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While unlikely that both geysers will turn on at the same time, and I could add a control device to ensure they don’t, pulling 50A out of a lead acid bank is probably not a good recipe for longevity.

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My ESS was configured with a minimum SoC of 80% but seeing the above I pushed that 95% and when the batteries hit that, the inverted backed off and the geysers drew direct from the grid.

What are my options to only support the loads on AC-Out-2 with available solar and leave the batteries to only support essential loads on AC-Out-1?

My MultiPlus II 48/3kva is configured with critical loads on AC-Out-1 and geysers and kitchen appliances of around 28A on AC-Out-2.

There is no energy meter being used as my understanding from the ESS YouTube webinar 2016 is that this is the preferred configuration.

This is late on a cloudy rainy day. Panels can produce up to 2300W from what I’ve seen in the week they’ve been connected.

I have seen screenshots where there is a separate box on Venus display for critical loads and another for AC loads. Per my screenshot below, I only have AC Loads.

How do I split out critical loads?

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My RV has 675 watts solar, a 150/45 smartsolar charger, BMV-712, CCGX with nano WiFi adapter, a Multiplus 3000/12, and 3 100 ah lithium Battle Born batteries.
I’m having trouble getting the Multiplus to connect to VRM. Data logging occurs sporadically and the Multiplus hadn’t been seen in over a month so I thought to delete it and re-add might help. Now I don’t see where I can add the device back to the VRM installation. The Multiplus is not in the list of available devices to add. How do I put the multiplus back into my VRM?

TIA

Hi, there isn't a way to know where this error 21 come from. We realised that this error came often when a client just buy a MPPT to us, not a full solar kit. And this happended when there is many solar panels or batteries.

The last case, the client has 6 solar pannels 160W 2s 3p, 960W and 5 batteries in 12V for a MPPT 100/50. (Already told this client to improve his install before change the MPPT)

Maybe a dumb question. I have a lot to learn. I bought a BVM-712 to install in a new to me truck camper this weekend (2013 Lance 825). I will use the VictronConnect Android App to monitor. I note that the setup wizard will ask me to input the battery capacity. Unfortunately, I don't have a clue what my battery's AH rating is, and would appreciate advice on how best to proceed. The battery is a single 12 volt flooded lead acid. The label on top reads "MARINE-RV" ;"EXTREME CYCLE DUTY"; "Distributed by ABSS, Everett, WA." That, along with a yellow "8/18", is the only information provided. (I have reached out to the named distributer, but haven’t received a reply yet.)

My question is, how important is it for me to ascertain the battery’s capacity rating and input that into the app? Is it required for State of Charge and Time to Go? If I just guess, will the monitor self calibrate over time? If I should instead manually determine the capacity, any suggestions for how best to do that either using the BVM itself, or a DVM?

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Hi

I have a new project for an off grid three-phase installation. As this is my first three-phase project, I am looking for informations, schematics on this subject. Could you direct me to the documentation on this subject? Thank you.

Nim

I observed an inconsistency of readings on my supervision, indeed the curve of percentage of charge went from 86% to 100% in a single blow (10 mins which is my sending frequency) while the sunshine was decreasing, here is a picture to illustrate:

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Thanks

Hello everyone,

My use case is probably pretty unique, but here it is.

I’m converting a big box truck into an RV as a hobby of mine. I installed a 50 amp 120/240 receptacle on the vehicle and my idea for how the electrical would go is:

Shore power L1, L2, N, Gnd -> 50 amp 2 pole main breaker

Main breaker L1, N, Gnd -> subpanel

Main breaker L2 -> multiplus AC input

Sub panel N, Gnd -> multiplus AC Input

Multiplus AC output L1, N, Gnd -> subpanel (other hot leg)

Is there any problem with doing this? Any issue with the power assist since the neutral from shore power is forwarded to the subpanel from the main breaker

Hi Look for help from some experts

I have installed an off grid system with multiplus inverter , smart solar charger , Venus controller with 5 Kva avr backup generator with 10kva lithium batteries. All lights etc low voltage.

The gennie is a 5kva AVR 240 v autostart connected to the venus for remote start stop

The system has been running fine on solar all summer. Finally connected the generator to auto run as winter is approaching, with less sunlight and build nearly completed

I have a few issues that are beyond my knowledge.

When the generator was first connected it wouldn’t run, so I read this forum and changed a few settings to get it to accept . It now charges etc.

The problems I have are.

1. When the generator is running, the dimmer lights flicker badly.

2. Range Cooker which is apparently voltage sensitive cuts out the oven when on genie

3. When running on genie the multiplus is very noisy, loud buzzing enough to keep you awake

4. Is it possible to get more charging power out of the genie so as not to waste the potential input.

5. when genie not in use there is sometimes some background noise but nothing as bad as when genie running.

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Hi All,

Need a little advise before purchasing one of the above...

I have just bought a VW Caddy with a Euro 6 engine and alternator, my plan is to convery it to a camper with a multiplus and solar/mppt fitted. I have some Victron AGM Battries (2x 60Ah in parallel) and want to be able to charge them from the altrnator when driving.

Being a euro 6, do I have to use a BuckBoost? Or as I'm using AGM, can I use a Orion-Tr DC-DC Converter?

Thanks

Hi guys,

I would kindly ask the owners of 48/5000/70 Multis to confirm here if they ever seen charge currents over 50A in their systems.

I have installed two identical ESS systems in last year and none of them were able to charge with more than 50A even the solar power was plenty enough, all excess power is dumped into the grid. The REC-BMS LFP battery BMS didn't limit the charge current at such a low value.

Please see the pics below for exemplification.

Thanks,

Mihai

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Is it possible to still use DVCC with VE.Can smart solars? The information on the CCGX states that VE.Can solar chargers are not supported, however, I just need clarification that this is also the case for the newer Smart Solar devices.

Many thanks.

Hi,

I have following setup:

2x 130W solar panels in series.

1x MPPT 75/15 connected to a 180Ah battery.

As I connected the panels yesterday (very cloudy day) I noticed that the voltage reading ("solar voltage" in Victron App) fluctuates very much. I had readings going from 20V to 36V in just a second. It keeps dancing very much. The sky was cloudy, but there was no visible fluctuation in light intensity. The open voltage of the panels stays steady at 36V. The charging output of the charger was also stable on 13,7V.

I was wondering whether this is normal behavior or not.. Could it be that the mppt has difficulties tracking the MPP under low light conditions? I did not have the ability to check the behavior under 'normal', say, bright sky light conditions.

Thanks for the advise!

Hi There,

Im having trouble with an ess system. When there is a power failure in the early afternoon, there is also still plenty solar power available. The problem is that freq shifting is not cutting back power fast enough on the gridtie inverter leading to overvoltages on the battery.

The setup consists of 10kWh lithium pack with 8kVA quattro and 4.4kWp of solar panels on a 4.6kVA solis. The system uses a ac current sensor to monitor pv production.

I have already tested with higher freq values, but still response times are too slow.

Is there a specific grid code which will work better. Currently i have nrs 097 selected.

Any suggestions on what im missing?

Initially power on the gridtie cuts back nicely, but then ramps up and continue to produce at max power until the battery or invertter switches off.

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Hi,

Are the Blue Solar panels rated for applications out at sea where they will be exposed to a high amount of salt water? I cannot see anything in the certification section of the VE website however have noticed other panel manufacturers either specifically exclude or include this type of application/exposure in their documents.