I recently installed a three phase setup with three MultiPlus-II 48/3000/35 (fw 459) with four Pylontech US3000 battery modules.

Everything works. During normal loads ESS balances the grid setpoint and optimizes for self-consumption just fine. Now I discovered an unexpected behaviour regarding what happens when one of the Multis reaches it's load limit during grid connected inverter mode while the other two are not doing much at all.

What I expected:
When one Multi reaches it's load limit additional power is taken from the grid. ESS balances to the configured grid setpoint as the other two are able to provide additional energy.

What happens:
One Multi reaches it's load limit at 3000VA. Additional power is taken from the grid. The other two Multis are only providing their (very small) loads. Power is taken from the grid without balancing to the grid setpoint - energy is bought from the grid altought it could be taken from the battery.

My batteries can provide around 7000VA easily so this can not be the problem. Also the system balances out during normal operation just fine. Is this expected behaviour for ESS? If so, why? Makes no sense to me.

This is a drawing of my "powerplant". Except for the part with the Ouattro Inverters, I have already realized everything:

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Black normal operation:

In normal operation, the solar system feeds the battery charger and the battery is charged.
At night, the battery is discharged via the same path.
PV and battery can be switched off by NA if malfunctioning.


Red are the actions in case of power failure:

The network is disconnected by a large contactor. (How to do that exactly, I have to find out)
Due to the power failure, the two contactors open from the NA protection
The voltage or current on the supply line of the NA protection breaks down.
The battery WR registers this and activates DC out and the power reduction of the PV to 1/3 power = 27.6 kW
The NA protection registers a correct voltage / frequency and opens the contactors for the PV system
The PV system starts up again and supplies power to the battery and house

Everything seems correct, but is that correct under VDE AR4105?

What is missing, what else needs to be considered?
Please your comments!

Hi guys, I have a Victron 48/3000 Easysolar MPPT 150/70 installed with 12 x 300w solar PV panels facing due north at 26degree pitch as an Off-grid unit for a shed a few months ago and the support from supplier non-existent so I've come here to ask for help. I currently have only an inverter fridge and internet & light connected so load is usually sub 100w as shed is still under construction but when complete I had planned to run tools etc and low level domestic usage. At this stage the SOC is consistently declining despite constant warm sunny days and when I plug in a 3600w generator it supplies the load (useful for when I'm using power tools for construction) but does not charge the batteries? In the morning on full sun the colour panel says it's supplying sometimes up to 900w but this always declines despite the batteries lowering their SOC during the day. I may have the wrong expectation but I thought in full sun a system like this should deliver plenty of power? How much power should go into the batteries in full sun? How much power can I expect out of the system in full sun? I was hoping to run all my workshop equipment off it in full sun. I have zero experience in electronics and despite several attempts to contact the supplier I am getting no joy...any advice on perhaps something simple I'm not doing? No instructions were offered on installation and I can't find a user manual online for this system either. I have once in my frustration connected the generator and switched the Inverter to Charge Only and this seemed to kickstart it all back to life but I'm not even sure if I'm supposed to do this? Just a female...so go easy ;)

Hi, in the case of comms failure between master and inverter, is the Fronius inverter automatically disabled or kept with the last known setpoints?

Thanks

hi there, i am new to this forum and also a PV beginner, so my questions might sound silly, apologies.

two things:

1. i have a 75/15 mppt installed combined with 2 50w westech panels

panel specs:

how many more panels can i connect in parallel? as far as i can understand, i need to add the short circuit current figures and make sure that total amps don't exceed 15 amps.

2. i want to deliver ~15 amps 30-35 meters away (100-114 feet) from the battery bank. a dc cable calculator i found online, suggests that an AWG 00 (~9mm diameter) cable should be used. has anyone done anything similar?any suggestions?

thank you all in advance for your answers

Hi - If somebody can help on this.. If you see below my battery is on float state and reading shows 54.9V. But the setting in the configuration for float is 55.2V. But the charge never goes beyond 54.9V and its always charging. When I check the voltage at the battery terminal its at 55.2V.

Is this an issue if its always charging or why does it no go beyond 54.9. The distance between the battery and the Easy solar is less than a feet. How do I correct this?

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Hi

I have a 2 week old installation of OzPv gel batteries charged by a Victron MPPT 250/100, a Multiplus 5000Va inverter and ColourGX. I get no battery SOC even tho the MPPT knows when to move to absorb'float etc during daytime and the Multiplus knows how much charge taken from the batteries. Is there a setting for CGX to display SOC or do I need more hardware?

Thanks. You guys do a great job!

Clve

Hi,

My BlueSolar MPPT 75/50 (v1.12) has been working for many years, I recently connect to my laptop and VictronConnect, it detected a new firmware v1.39 and I have to upgrade to continue using VictronConnect.

I upgraded the firmware but now charging staoped and there is a error on Victron software "#116 Lost Calibration Data" its not working anymore. Bulk and Absorption LED flashing blue simultaniously.

I down loaded v1.43, upgraded but still same issue.

Can anyone help revert back to the original firmware v1.12 please, my device is 6 years old so cant send back to dealer.

Any help will be appreciatded.

I have tried to access the data of an offline system via the sqlite3 file on a USB key. The file seemed to process and a green dialogue box came up indicating 'success'. However, I couldn't see the data anywhere to display. When I tried to reload the sqlite3 file, a red box came up indicating no valid identifier. What should I do?

The CCGX is not seeing my dongle. i am running the latest firmware. is there a trick to this ?

Hi - we are currently running a 1kw solar system with your Blue Solar MPPT 100/50 and have a manual generator backup with a BlueSmart IP65 15A charger. We notice that the BlueSmart keeps switching to float when the batteries are not fully charged (sometimes within 15mins when the 12v batteries are at around 11.5v). The same thing happens when we connect multiple chargers to the batteries in a ‘charger-bank’ setup. We are wondering whether the MPPT is confusing the Battery Charger and whether we need to switch it off to get it to work properly?

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hey guys actually i was trying to make my solar system works properly, but my filax advise me that it doesn't receive the priority source, so it says: "priority source fault" what should i do?

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Hello!

Using a Muitiplus 24/3000/70 (with 800AH AGM bank) to power a self-build mobile café.

Initially using shore power during operation due to high demand appliances and battery power for (the fridge) overnight.

Now when shore power is shut off, low batt alarm sounds (despite 98% SOC) until it is reconnected.

also, the inverter is never functioning though 'on' and AC-in is not charging the batteries, when viewed on the color control..?

As well as this problem, I worry that the batteries are not being discharged and recharged enough to keep them healthy, as the power is always coming from the grid and not the bank.

Can I set the multiplus to use the batteries down to a safe minimum level, ignoring the grid connection,and then charge them up fully again...while also using shore power as 'power assist' to cover spikes in demand from appliances..?

Just joined the forum, so many thanks for any advice,

Ciaran

(Little Black Box)

Can I set the multiplus to use the batteries down to a safe minimum level, ignoring the grid connection,and then charge them up fully again...while also using shore power as 'power assist' to cover spikes in demand from appliances..?

Just joined the forum, so many thanks for any advice,

Ciaran

(Little Black Box)

I have a brand new MPPT 100|30. I have TV and battery connected. I see a blue bulk light.

When I go to discoverable Bluetooth devices it shows nothing.

What am I missing?

I have a bank of Rolls AGM 115ah batteries wired in 3 pairs to give 345ah at 24 volt.

These are connected to a Quattro 24/3000/70 inverter and a 100/30 Victron MPPT smart controller via a Victron datalink box

These communicate to a CCGX color controller.

I just added a smart BMV 702 battery monitor and powered everything up.

The CCGX does see the Solar MPPT and BMV but now does not see the Quattro.

Using ve-config I can see the inverter is OK, has the latest firmware, and reports an SOC of 100% (which ties in with the BMV). Whilst connected to the CCGX and the inverter is off the inverter starts when running ve-config then stays running when disconnected from the PC but is still missing from the CCGX list of devices

I am at a loss as to why the color control does not see the inverter despite changing cables and re flashing the inverter firmware with latest version

Any help would be appreciated please!

Have been using the controller for a month with no problems, connecting to Vic. Connect on two android phones via wireless bluetooth. Today neither phone can find the bluetooth signal - keeps saying no devices found. Tried uninstalling and reinstalling the app, no joy. Seems like the 100/30 has stopped sending out the signal.

What to do?

Jim

Hi, I have a BMV-712. Installed it last week. Initially, everything seemed to be working great (i.e. when I plug into shore power shows +amps, power off shows no -amps, etc). Recently I began to notice a consistent -0.4 to -0.5 discharge that is consistent even when I have the "master" switch of camper off. Nothing is powered. Any idea what could be going wrong here? How much power does the BMV-712 use?

Hi

I have a colour gx on a system 2x 5kva multi with byd battery’s and fronuis primo ac coupled

The issue is random rebooting of the colour gx when relay is closed or opened to start or stop the generator

Generator stops and starts and have no issues previously on the other installs I have stopping and starting the generator using the colour gx

All components are running the latest firmware

Colour gx 2.33

Mutlis 460

The relay for the colour gx is only driving a relay that opens and closes the pair for the auto start of the generator wired the same as all the other installs I have done

Regards

Mike

Anyone else using a Tesla battery? I'm surprised to find that I can not turn on my inverter below 21.8V. Do I have to return this inverter?

The tesla battery is supposed to be 20% SOC at 19V, 100% SOC at 25V. Please help me utilize my full battery. Thanks.

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When programming 48V off grid systems with lithium batteries, I have found that the the 'DC input low restart' value's minimum 4V above the 'DC input low shutdown' voltage to be way too high.

My feeling is that this 4V margin is intended for lead-acid batteries, but it is not suitable for the much narrower operating voltage range that many lithium batteries have these days.

It is important to have low voltage shutdown set correctly to protect the batteries from over discharge, however, if this does occur the system won't restart again until the batteries are almost full!

I have also found this to be problematic in the event that a system is at a partial SOC (say 40% for example) and it is shut down manually for maintenance reasons. In the process of shutting the system down the inverter experiences a 'DC input low shutdown' voltage (momentarily before it dies). Then when the battery is reconnected the inverter won't turn on until it reaches the 'DC input low restart' voltage which corresponds to a SOC much higher than 40%.

~~~

Another feature that would be nice would be to be able to shut the inverter down on a set SOC outside of the ESS assistant. Or maybe this is already possible by way of virtual switch, which I haven't explored much yet??

English more far.

J'ai un souci depuis ce matin mon contrôleur victron smartsolar 75/15 m'a demandé d'effectuer la mise à jour vers le firmware v2.19 que j'ai effectué sans souci.

First off, let me clearly state that I'm a total moron when it comes to matters of electricity and electronics. Perhaps I should also mention that all the installations I'm about to refer to were done by Victron accredited installers. Historically, about 4 years ago, I had a 12/1600/70 inverter installed in my house to cover daily electricity cuts of up to 5 hours, and this worked perfectly for the appliances I wanted to keep running during those power cuts. Of late, however we are now experiencing power outages for 18 hours daily, so I decided I needed a solar solution as back-up to keep the 2 X 12v 200Ah batteries charged during daylight hours. This was done 2 days ago, but according to the battery monitor readings, the reserves keep dropping, which, to my addled brain indicates that the solar panels (3 X 265W) are not charging the batteries? My question is this: Is there a possibility that the MPPT 100/50 charge controller isn't doing its job, and if it is, why doesn't the battery monitor indicate an increase in storage levels?

I have a MPPT 75/15 and a mppt 100/30 solar controllers, today was prompted to update victron connect firmware to 2.19 from 2.14. Both Failed at 86%, response timeout. The 100/30 lost its firmware version, the 75/15 retained the 2.14 but will not let me connect until firmware is updated. I tried multiple times on both with the same result each time.

I recently upgraded my Victron MultiPlus to a MultiPlus II with a SmartSolat charge controller and grid meter. My previous setup had a BMV attached but the installer said it was "no longer necessary". But the BMV connected to the Colour Control GX used to give a nice estimate of battery time left based on current instant usage.

Yes, I realise that projection is very rough as consumption varies and batteries don't discharge evenly, but I liked it.

What I want to know is:

1. Should I just reconnect my old BMV device?

2. Any chance of the Colour Control GX having a rough capacity/amps calculation added to the battery icon on the display to show estimated time left?

My country works in Rands (ZAR) and I don't mind using the $ price but our cost is a bit over R2 per kW and the $ price stops at $2. An easier option than adding currencies may be to just increase the range of $ to $3 or $4?

I have the above inverter with Rolls 5000 6CS25P batteries (supported with PV panels) which are 14 years old and have done great job. I am thinking of replacing them with Pylontech UP2500 24v batteries but cannot find any confirmation that they are OK with Multiplus as above. All advertising notes them as suitable for backup or UPS but not for daily cycle solar power. My alternative is to get a new 48v Multiplus, which would be a shame as this one is only 3 years old, with the Pylontech US2000B or US3000B batteries. Any thoughts much appreciated.

I am looking to buy a 2nd hand CGX, but is concerned HW version may have changed to a point where older versions may not be as efficient as the latest. Can someone please shed light on the topic? PN BPP000300100R SN HQ 1435WEHNT which looks quite old. I am unable to find anything in change logs or searches to suggest I may my myself some future trouble.