luis avatar image
luis asked

Configuration of Off-Grid System

Hi there,

Possibily this is an odd question. I am trying to set up a 1-phase off-grid system. I have:

+ 2 Quattros 15000

+ 2 Fronius Primo 8,2

+ 2 10 kWh BYD BOX Batteries (with the special VE.CAN Cable)


+ Energy Meter ET112

+ 14 kVA Genset

Don't pay attention to the oversizing of the system, it will be expanded afterwards.

I have power in AC-In 1 (right now the grid, but it will be the Genset). I have flashed both Quattro (VE.Flash) and set up the bus configurator (AC-In1 active, AC-In2 disabled, 1 phase). I have tried to set up the Off-grid configuration with the VE.Configure but I can only see Grid-tied systems.

Moreover, I have no output power in AC-Out1 (nor AC-Out 2) and I can not charge the batteries nor power the CCGX (where I suppose I can enter the battery parameters).

1) Since Victron devices were first though as stand alone systems, this question may be out of date, however, how can I configure my system? I have looked for long in the community, tutorials and so on, so maybe there is not much to configure...

2) How can I get power in AC-Out?

EDIT: 3) I'd prefer to set up the BYD Battery parameters via CCGX, rather than via VE.Configure. Is it possible?

Thanks a lot

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3 Answers
luis avatar image
luis answered ·

As far as I know, Multis/Quattros can only start delivering power via AC-out when the battery is connected. The problem is that modern Li-Ion batteries need to be wired to CCGX (via VICTRON CAN A cable) to start comunication and be able to be dis/charged. For that CCGX needs to have power, not always available from modern Li-ion.

My solution was to get power from somewhere else, but this is not always possible.

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Alistair Warburton avatar image
Alistair Warburton answered ·

There is an on button on the battery manager... it will boot the battery system, powering up the DC, long enough to establish coms with the CCGX, assuming the cable is correct.

If you dont establish coms the BYD will go back asleep and drop the DC again,

Long enough is some minutes not seconds.

I just set up a new system, not the same but the same tech, more or less. I have a Multiplus and a 13.8 BYD ut the connections/interactions are the same as far as I know.

AC output isn't your problem, you will ger that when the DC is on and you start the inverter/s

What you need to do is make sure the CCGX is talking to ALL the kit it needs to, so it will configure itsself, and yes it will do that but for a couple of minor tweeks as backstop settings and options.

I could be wrong, as I only have a single inverter, but I think base on protacol docs I looked at the Quatros will operate as a single unit once networked.

The CCGX will se one inverter at 30000 VA and the BYD, which it will use as its SOC instrumentation. The charge voltage and current limits are then dynamically set in the inverter by the BMS in the BYD... For example if the battery is cold the maximum charge current will be reduced. Some/most charger settings will be ignored and the CCGX will report the charger, the one made up of the two inverter chargers, as being in remote mode.

I strongly recomend you read everything and ask about speciffics that you dont have a handle on but start by turning it on, at the BMS and establishing coms to keep it on.

Hope that help and that it is not irrelevent for your BYD variant.

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victronlive avatar image
victronlive answered ·
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