I have now assembled all the components, Multiplus 11, MPPT 450/100, Cerbo, Touch Screen 70.
Lynx distributor wired up but not comms cables. Not sure what the next step I should take. Having seen a video of the Multiplus being configured as a stand alone job I wonder if that should be the next step. I have yet to install the BMZ battery it is the last of the components and I am not sure how best to do this and at what stage as that will need to be set up with its own parameters. From what I can make out the battery is configured within the inverter configuration and elsewhere but does the battery need to be in place and wired in for this?
It has become a bit murky at the moment and I have not managed to find a way to go forward from here.
Yes, the multiplus needs to be configured before any AC connections are turned on. To do this the battery MUST be connected first. Use a Mk3 and VE configure to do this.
So finish the installation of the battery, and make sure that you have a stable output voltage. Connect the BMS data to the cerbo, and access the Cerbo to configure the BMS connection.
Configure the inverter, then connect the inverter VE bus to the cerbo.
Thanks Mike. That sounds like a good method but I am concerned how much pre-connections I will have to do. My battery needs a continuous communication from the inverter otherwise it will switch off after 10 or 20 mins. That means I need to connect that up via the Cerbo et al. The Victron video demonstration on a bench looks like it is AC powered and no battery attached. I have downloaded the Connect app and it lists the equipment covered. My Multiplus 48/8000/110-100 230V is not listed so wonder if it is covered. I had a play with the demo using the next one down the 5000VA to get a feel for it. Changing the values and working through it looks easy enough the issue for me is I do not know enough about what to change on a lot of the values. My BMZ battery is well documented so can input those values and I am ok on the AC side of things.
You need a resistor or similar (lamp) between the batteries and inverter, to avoid a spark when the capacitors fill up. Unless the batt bank is huge.
Why would the batteries shutdown after 10-20 mins? What model do you have?
Thank you. I do not know why it switches off safety or conservation or similar? Must reside in the BMS I guess. The battery is a BMZ ESS X 10 kW. I chose a Victron replacement when my Delios inverter failed and company gone into receivership. VE was only one of 2 makes I could replace it with, that could be configured with the battery. I have checked the manual and it switches off after 20 mins not 10 after loss of inverter communication. I only found out when after an outage that the battery had switched off. I did not have critical loads set up which would have kept it going. I would prefer to configure the inverter using AC to avoid battery complications when configuring. It looks like I also need to download ESS to the inverter but looking at the Connect software I have downloaded it does not look like Connect 3, that is shown on an ESS video I looked at. My version of connect has no tabs and I cannot locate connect v 3. Maybe it show different when inverter is connected up to the PC and connect.
@sylulu yes, this is for safety.
IF you connect the remote voltage sensing of the inverter to the battery bus, then this path includes the precharge resistors. Some battery management systems also include a ‘soft start’ mechanism, where the BMS drops about 1- 2A (current limited) onto the battery bus when turned on. For batteries like this, the external precharge is not required (!) BUT all of the inverters and solar charge controllers must be connected to the battery bus before the first battery is started.
The Cerbo will provide the ‘keep awake’ signal to the battery with or without the inverter connected to the Cerbo.
If the bank is large then you still have the problem. This (precharge requirement) is Voltage related, and needed for 48V, a good idea for 24V and normally ignored for 12V.
NO!! you must not do that. The inverter configuration out of the box is ok for connection to the battery. Then as you set up the inverter, you start by configuring the AC parameters. The Mk3 connects to the inverter and normally to a laptop for configuration, this does use different software (VE configure) than VE Connect , However VE configure (latest versions will work for single phase cases). If you have only a phone to configure with, you may be better off with a ve bus to bluetooth adapter if they make one - or Mk3 to USB-C.