Hi there.


I'm in the process of making a list and trawling through all the documents I can find on how to pair the BYD batteries with a Victron EasySolar or MultiPlus for an off grid setup. Basically, my setup will be as follows:


All control gear and batteries to be stored outside, but under an awning.

2.8kw of solar, which will work with a 150/70 MPPT charger.

BYD B-Box RESI IP55 cabinet with 5.12kwh battery

Either the Easysolar 48/3000 or the Multiplus 48/3000.


Can anyone who is familiar with this combination tell me if there is any advantage to choosing the Multiplus unit over the Easysolar? The Easysolar works out cheaper than buying all the parts and cables individually, but I've noticed that the IP rating on the Easysolar is only IP20 though, so maybe it's not suitable for installations outside?


Any thoughts or suggestions would be much appreciated.


TIA

Existing system:

Grid supply is 2 phase (120 degree). 2 x 48/8000/110 - 100/100. One on each of the 2 phases.

9.6kWpk on 2 x Delta Solivia 5.0 AC inverters (one per phase - old Grid Tie system) on AC Out of Quattros.

6.6kWpk Solar on 2 x 150/85 MPPTs DC Coupled.

Battery is 9 x BYD B-box LV 23kWhr

Latest firmware in everything. Quattro's are running the UK grid code and are feeding excess solar to the Grid.

I'm attempting to connect a 15kVA 3 phase backup generator to the ESS system and have connected two of the three phases to the ACIN1 of both Quattros. (The grid is connected to ACIN2). To balance the load on the generator I've connected the third leg to a Titan 48/50 battery charger. I had to disable LOM on the ACIN1 to get the generator to stay connected. It all works perfectly in regards to connecting and charging. I'm not concerned about the interaction between Gen/Quattros/AC Inverters as the generator won't be running when the sun is out anyway.

The problem I have is that the Quattros will not connect to the generator when the Grid is available on the ACIN2. It hooks up every time if I isolate the Grid.

I figured I could possibly rectify it with an Aux input/Assistants to "Ignore ACIN2" but it didn't work either.

As soon as the Generator is available on ACIN1 it diconnects the Grid on ACIN2 but won't connect to the generator. If I then isolate the Grid it hooks up and starts to charge. I can then reconnect the grid and the generator stays connected as it should. When I shut the generator down it disconnects and the grid reconnects on ACIN2 as it should.

I've read all I can find on the subject but can't find a solution.

Any help would be appreciated.

Mike L.

Hi

I have 2 BYD 2,5kWh modules, that each have a 35A Charge Current Limit (CCL) and Discharge Current Limit (DCL), therefore, I would expect to see a continuous 70A CCL/DCL for my system.

However, according to VRM, my CCL/DCL are always fluctuating between 35A and 70A:

[image]

It's like this since I installed the system (a few months) and has no noticeable impact in performance (I seem to be able to pull ~50A from the battery, even when the DCL drops to 35A):

[image]

Any idea on what's going on?

BYD B-Box Pro firmware 4.17

Multiplus II 3000VA firmware 459

CCGX firmware 2.42

Hi, i want to know if i have any risk of damaging anything if i disconnect (rotary switch 300Amps and shut down battery) the BYD battery from EasySolar when PV is connected at Night and during the week end. I don't want to leave the new installation "alone" for the moment.

i've see here many differents answers but no one really match my case...

I understand it can not dammage the MPPT but it can occure an overvoltage when i disconnect it, that's right ?

Thank you

Bonjour à tous,

Je viens d'installer un système offgrid composé de 65 Kwc de PV, 9 onduleurs SMA 5.0 et 3 quattro 48/15000. Le stockage est composé de 12 batteries BYD de 13.8KWh.

Tout fonctionne à merveille mais alors que la charge des batteries n'est pas encore complète, le quattro maître augmente la fréquence de sorte que je ne peux pas profiter de toute ma puissance photovoltaïque. Je vois sur le CGX que je peux charger/décharger mes batteries avec un courant de 2100A sous plus de 50 v et qu'en réalité, il charge à 360 A .

Comment expliquer celà ?

Merci à tous

Dominique

[image]

[image]

Hi, i don't find informations about BMS settings in the MPPT menu. In the BYD installation and settings tuto, you don't speak about this parameter.

A second questions is, with the new victron connect we can import config file and upload it to the device, is it possible to made a collection of config file or an user config repository for this type of product (batteries) ?

Hi all

I've noticed recently, while running on batteries with load > PV input, ESS mode, grid on, that the system seems to lose comms with the batteries for a few seconds every now and then (a few times an hour). During this state, the system pulls the load directly from the grid (as I guess it thinks the batteries are flat/nonexistant). Then comms comes back and the system runs off the battery as expected (So I get regular spikes in my grid usage).

[image]

CCGX v2.40

MultiPlus 48/5000/70-100 firmware 433 BYD B-Box Pro v4.22

SmartSolar 250/60 v1.42

System is about 6 months old.

Cable from B-Box to CCGX is maybe 1.5m max.

This is relatively new behaviour...

Hi,

In an installation where a Multiplus II 48/5000/70 and single BYD 2.5 battery will be used as a UPS, is it possible to set the maximum battery discharge current to protect the BYD battery? The BYD battery spec says discharge should be limited to 2.6kw. So the Multiplus will be connected to the grid, and the BYD battery will serve to provide power if the grid goes off. The system only need to be able to supply about 2 to 2.5kw max.

So is it possible to set the maximum discharge current from the battery to 2.6kw, or otherwise, can the Multiplus be set to output to a maximum of 2.6kw?

Thanks

Is there any Victron products available that will allow a 48v alternator as an alternate generation source to an existing 48v Victron off grid system and connect to the BYD CAN BMS?

Could someone please explain the procedure of updating the firmware of BYD 13.8?

I installed a three phase system of 15KVA Quattro on a parallel system of 5 units 13.8kWH. BYD firmware version: 4.22

Observations: I have a Charge Current Limit (CCL) of 875A

The total charging power displayed on the CCGX is the cumulative of the inverters charging power. (Which is very fine)

Now I installed the same 3 phase system using 4 BYDs but the firmware version is 4.17

Observation: The charging power displayed on the CCGX is the power of a single inverter i.e the charging power of the inverter the CCGX was connected to(Master/L1)

The Charge Current Limit (CCL) displayed on the parameter is also 175A.

This is traceable to the firmware version of the BYD. Any assistance to be rendered to update this BMU will be appreciated. No traceable solution on the internet.

Michael

HI < I have the following installed and working ok until a recent shift in the weather so needed the generator,

1 x 10KW Quattry with 433 firmware updaed

Color GX with V2,23

2 x MPPT 150/100 with V1,39 ( 24 x 250Watt modules)

BYD Box 10 x 2 with V4.17

Good quality 1500RPM 15KVA Generator with very stable 231V output and 51HZ no reaction to loads( IE no slowing etc)

System has been working fantastically well under quite heavy loads until called for generator,

The system starts generator ok on demand at an SOC of 20%, and runs up genny ok, then connects to the Quattro input and goes through the normal sequence, starts bulk charge, after a few mins ( even as much as 15 mins) all seems normal, then for no apparent reason the AC input is dropped by the inverter, and the system reverts to invert, after a few minutes the AC in accepts input and goes to passthrough and then Bulk, and again after a few mins drops the AC input, and so it goes on,l imit inverter off,

On system Setup,

Battermonitor automatic, Sync VE BUS SOC On,/use solar charger current to improve Bus VE SOC on, Solar charger voltage control On, Solar charger current control on,Has DC System off, DVCC On, , SVS Off, STS On, Limit charge current On, BMS control On

Generator start stop, on Auto, SOC< Battery voltage and Load atr 5KW,

any ideas as to why the Inverter keeps dropping AC would be helpful, or if I have any setting incorrect or not activated please advise,

thanks,

Did a firmware update yesterday of a system with 2 x BYD B-PLUS2.5 & a MultiPlus 2 3kVA. I've noticed the BYD is reporting currents down to 0.1A (just the Venus GX running). Steps up to 0.3A (MultiPlus 2 running with no load). The SOC seems to be more accurate too. Previously I don't think it would resolve below 1A and the SOC would be inaccurate after being left overnight.

Just wondering if anyone else has noticed this?

Updates were from Alps Power site, BMU upgraded to v4.23, batteries to 4.12. All Victron firmware is latest.

Cheers, Matthew

Hi

I purchased a 2.5 kW BYD 3U battery module and did a fully charge according the datasheet. After trying to discharge the battery while logging the battery capacity, I found after 1550 Wh/29Ah that the battery bms cut off the battery when the voltage drop below 50.2V. Is there a way to change the cut off voltage to e.g 48V as obviously with current settings, I'm not even near to utilize the 2500 Wh capacity?

Hi Guy and others,

I've done a few dozen installations using the BYD / Victron combination (A multi with CCGX and 4 x 2.5kWh cells)but read somewhere about a new 'simpler' programming option. Can you enlighten me?

Cheers!
Diamond

Since half a year I have 3 Multiplus with a BYD L Box 14kwh
Connected with special Victron cable VE Bus from Color Control to BYD
Box Inverter input. Works perfectly. CC has contact to the BMS
and the controls are working. Now I have a 2nd box 14kwh and would like to
connect the BMS of the second box. According to the BYD description
a normal network cable should connect the two CAN bus connectors of the boxes
connect. Unfortunately the data of the second box does not arrive in the Color Control Display.
When I start the second box at the main switch, the first box switches off.
There is no communication between the 2 boxes and the Color Control.

I can't find the Discharge Current Limit shown anywhere for the 14kW battery bank. I have GX version 2.33 firmware and two batteries (28kW).

Please can someone advise what this should show and if possible where this is shown on a Victron web page?

Thanks.

Hi,

We have a system with a 10kWh BYD (4x 2.5kWh modules) where the discharge current limit is showing as 196A on the CCGX. All the previous systems I have seen show the discharge limit as 35Ax number of modules so in this case 140A.

Has there been an update recently allowing a higher discharge rate?

I have recently installed an ESS System (Victron Multiplus 48/5000/70) with one BYD 5kWh and Fronius PV Inverter connected on AC out (on-grid system).

ESS is on "Optimized (Without BatteryLife)". The connection between PV Inverter and Victron is wireless.

The system is working ok but I have some issues which for the moment are unsolved.

For example, the PV production is frequently stopped just to return in the next seconds.

[image]

[image]

As you can see from the graph, PV is having a strange behaviour when charging the batteries, the graph looks like a saw teeth when I was thinking to be like a smooth line. The PV throttles down to 0 frequently as you can see and I do not know the cause of this.

Any ideas?

Hello,

I Have EasySolar 48V/3000VA with the two BYD Batteries 2,5 kWh 100 Ah. I set the Absorption voltage to 55.2V and float 55V as in BYD manual, MPPT 56.5V. But my system never goes to float phase, allways in Absorption. Can I make some change and improve this? Thanks a lot

I have an ESS system with 3 BYD 10 kWh and PV Inverter in AC out. I have set the ESS mode "Optimized (With BatteryLife)". The system has been working properly for months, with the strategy to take as less energy as possible from the Grid.

For a couple of days, the system has changed its behaviour (without changing any parameter). Now the battery has been permanently charged for the last two days.

I wonder if this is a battery maintenance strategy, in order to keep its SOH as higher as possible. Otherwise, I see no reason for this behaviour.

Hi all

So lately I've noticed while my batteries are recharging in the morning that SOC jumps from 82% to 99% pretty much instantly.

BYD B-Box 10.25 v4.22 firmware

SmartSolar Charger MPPT 250/60 v1.39 MultiPlus 48/5000/70-100 v433 CCGX v2.33

[image]

[image]

This has happened the last 3 days in a row...

[image]

Any ideas why this may be the case?

Thanks!

I have an existing Off-Grid-system:

MPPT 150/45 (updated) --> VE.direct
MPPT 150/70 (updated) --> VE.direct
BMV 700 --> USB
Multiplus 48/5000/70 (updated to V460)--> VE.Bus
ColorControl GX

I changed the batteries to a new BYD B-Box Pro 10.0
All necessary parameters I programmed before changing the batteries.

After starting the BYD-Box the CCGX starts but all devices appear except the B-Box Pro. Because of that the batteries shut down after a while caused by no data connection.

The cable is OK.

What is missing to get appearance of the BYD- Battery Box ?

We experienced High Battery Voltage Alarms on 2 Multiplus 48/5000/70 systems.

Settings:

- mode "Keep batteries Charged'

- both in Absorption mode

- Absorption voltage set to 55.2

However, with both systems the battery voltage went up as far as 58 V, triggering Alarms which cleared after about 3 hours, when voltage went back dropped back to around 55V.

What could be the cause of this?

A customer wants to have his PV installation working ok and have electricity in his entire house, even if a power outage occurs.

I am planning to connect the mains to the AC-in and all the distribution board to the AC-out of a well dimensioned MultiPlus-II. Also install PV panels, MPPT, BYD battery, Venus GX and an energy meter.

Will this ESS system provide backup and normal performance even in the event of a power outage?

I am not sure all Victron devices will continue working with no grid power, but with sunlight and energy in the battery.

Thank you!

Noob here... worried I have not got things set up properly.

Easysolar 5000, BYD 13.8

I am confused RE SOC instrumentation....

Supplier, Wind & Sun, say if I want to use DC I will need a battery monitor, which if the SOC is coming from the Multiplus make sense, but if the BYD box is providing SOC, which is how I have it configured now, then I dont understand why this would be the case.

Not suggesting they are wrong but would like to understand...

Part two of this question is about VEConfigure settings.

At least one of the manuals I have seen, sorry no idea which, there are so many but a BYD one I think, states that the SOC option should be ON when selecting Lithium from he general tab, however I cant work out what settings to apply if I set this and I thought that the B-Box was controlling things anyway... Suggestions?

I need educating and any help would be appriciated.

Good day

The system is as such:

Three phase 10kVA Quattro inverter system coupled to 8x 2.5 BYD B-Box bank (20kWh).

My question is what would the appropriate battery fuse be between the inverters and battery bank? The quattro manual states 400A, but to my understanding the BYD cells can supply 35A per cell, that is 280A.

Will one 400A fuse disconnect between the battery and inverters be adequate?

Thanks

Hi folks,

I will be hanging new PV tomorow morning and would apriciate some input.

I have a new Easysolar 5000 hooked up to a BYD 13.8 kW Lithium pack.

Obviously I will set the MPPT as directed in the manual, which I havent read yet, but I am also aware that the BYD battery manager, via the CCGX is going to 'manage' things.

What I dont know is how it will manage things, what I should look for to establish that all is well and if I need to make any changes to the MPPT settings, which I assume I will.

My supplier told me I needed a programming cable, USB to VE Direct I think, which I have but I havent found what I should be doing with it yet...

I still have manuals to read but the BYD manual dosnt mention MPPT settings, speciffically, and thus far I am unsure what software I need to program the MPPT in the first place. In addition The manuals for Victron kit havent, so far at least, been speciffic about BYD kit and I am not expecting the MPPT manual to be any different.

Am I correct in assuming I unplug the cable to the CCGX to program the BluePower and if so is VEConfigure what I need or something else.?

Any help/pointers would be appriciated. I am pretty sure there is potential to get this wrong and I would rather not do that, damaging 6k's worth of battery because I used the wrong setting is not a place I want, or can afford, to be.

Thanks, Al

Hi all

Looking for a bit of help. I have the Easysolar 48/5000 with the BYD 13.8 Lithium Batteries.

I have connected a generator to the system for charging the battery. I have two genets one is a 2000w and the other is an 8500w and both are AVR.

Here is my config on the Multi (the 26A is for the big genset i was using 6A for the small one):

TAB: General

System frequency 50Hz

Shore current 26.0 A

Overruled by remote unchecked

Dynamic current limiter unchecked

State of charge when Bulk finished 95.0 %

Battery capacity 270 Ah

Charge efficiency 0.95

TAB: Grid

Country / grid code standard None: (feeding energy from DC to grid not allowed)

Accept wide input frequency range (45-65 Hz) checked

AC low switch mains off 180 V

AC low switch mains on 187 V

AC high switch mains on 265 V

AC high switch mains off 270 V

UPS function unchecked

TAB: Inverter

PowerAssist checked

Assist current boost factor 2.0

Inverter output voltage 230 V

Ground relay checked

Inverter DC shut-down voltage 47.00 V

Inverter DC restart voltage 51.00 V

Low DC alarm level 53.00 V

Do not restart after short-circuit (VDE 4105-2 safety) unchecked

enable AES unchecked

TAB: Charger

Enable charger checked

Weak AC input checked

Stop after excessive bulk unchecked

Lithium batteries checked

Use equalization (tubular plate traction battery curve) unchecked

Charge curve Fixed

Absorption voltage 55.20 V

Float voltage 55.00 V

Charge current 26 A

Repeated absorption time 1.00 Hr

Repeated absorption interval 7.00 Days

Absorption time 1 Hr

TAB: Virtual switch

TAB: Usage

Virtual switch usage Do not use VS

TAB: Assistants

TAB: Assistant Configuration

Two-signal BMS support (size:139)

*) The battery is full when Auxiliary input 1 is open and

the battery is empty when Temperature sense input is open.

*) Force to float and set SOC to 100% when battery full and switch to charger

only when battery empty.

(note: I believe that the second part of the assistant needs to be changed as it would only use float while charging)

I set the config from this page on the Victron website HERE

Total size of all assistants including the required

(hidden) system assistants is: 198

so before I added the assistant the small genset would charge at 700w.

The big genset would charge at 1200w

[image]

After adding the Assistant and updating to the config above I got this.

Which is the same but seem to charge faster about 3-4% in 15 minutes.

[image]

Sorry could not get the images to rotate even turned one upside down but still uploaded upside down.

All firmware is compatible in the system.

My question is why does it take so long to charge the battery with the latest config and why am i only get 1500w and not 6000w? or is this normal?

Edit: Ok have just been talk to ALPS and noticed that SOC on the multi is switching from 100% to 67% for a second then back to 100%

Any info would be appreciated.

Good Day,

I have been trying to figure out which device is limiting charging current in below setup. There is some magic 3700 watt somewhere hardcoded or configured in my setup but so far I could not yet find it.

status during scheduled charging:

[image]

Device list:

[image]

Byd 4x2.5kw B-Box device parameters

[image]

I face this 3700 magic number limit everywhere....

1. during sunny day PV max output seen as ~3700watt in MPPT 150/100 (despite panels are rated as ~5kw).

2. Multi compensates rest of the consumption from grid when energy usage (output inverted) is higher than 3700kw despite the battery is full and rated as 140A.

3. At last today I realized that when I schedule a charging in ESS setup, to fill the BYD 10kw cells in early morning, again the system transfers only ~3.7kw max to the battery .

I upgraded all components to latest version in last couple of weeks (multi to v460, ccgx v2.33, mppt v1.42, also using updated version of ESS assistant ) but nothing changed.

Battery and system is located quite cool dry environment with max temp of batteries goes up to 29C and its 230V system. Any guess?

Hello Guy (as this will probably target you :-) ),

we run several off-grid BYD B-Box/Victron combos.

Cold weather charge performance required me to switch off DVCC for now ... since we cant

recharge our batts properly if its temperature drops below 13°C.

But i got no good feeling having DVCC off. Especially since the allow to charge/discharge contacts arent wired.

Unfortunatly i got no reponse from BYD so far, as to what firmware changes regarding this topic they might have made for the b-box. U meantioned in your BYD/Victron manual that they did make some changes. Do u have info on that?

overruling the charge limit via a CCGX option would resolve it all ... but guess thats not in victrons interest?