Hello everyone, I’ve just changed from one multiplus II 48/5000VA (one phase) and PV in AC in to a couple of multiplus II 48/5000VA in parallel setup with the PV in AC out. Also, I’ve a Carlo Gavazzi for the PV inverters (two Huawei 5KTL) and another Carlo Gavazzi for the grid consumption. ESS is p…

Hi, after connecting two MultiPlus devices in parallel, I’m having the same problem. Did you solve it?

Hi, No, I could not fix the underlaying issue. What I did to overcome this issue was changing the Grid Setpoint dynamically. If the battery is charging over 300W, the grid setpoint is set to -200W and that ensures there is no consumption from the Grid. This is not a robust nor a good solution but I…

Can you give me some details about your solution? I’m very disappointed with Victron. I bought a parallel unit, spending even more, because I thought I’d stick with Victron because of its reputation, but in reality the system is crap and old. I’d have been better off with a 6kW DEYE inverter. It l…

There are some important considerations when paralleling systems that can affect the behaviour. First, 2 systems are less efficient than one so any variances in setpoints can be amplified. If the age of the systems are different, this will affect balance and can make setpoint issues appear. The ru…

Had I known all this, I would have done it this way. I’d like to take this opportunity to ask: This evening I discovered something that I find strange. When I opened the VEConfigure page in the VE.Bus System Configurator software, in the parameters screen on the left, I see ACout at 0A on the slave …

Each inverter needs to have a configuration set in a parallel pair, they should be identical. Don’t use send to all. Apply the configuration to each individually via the veconfigure option in the system configurator. I would go back to the beginning and apply the configurations again, then double …

Hi Nick, I’ve already done that. I also tried installing the previous firmware, but with the same result, so I installed the latest firmware with ve flash and reconfigured everything, one by one. I checked the configuration, and it’s correct for both. What do you think about the lack of amps displ…

Maybe try run this on your cerbo. It should help see where the issue is. I would swap masters as a test as well. [image] Node red show parallel system stats Node-RED Updated to add: Donut charts. 24-hour historical chart (30-second sample, adjust as required…

Thanks Nick, I swapped master/slave, the amperage display on AC out remained 0A on the slave device, which appeared on the master device that was previously not working, so this is correct and my device is not defective. Unfortunately, I’ve never used Node Red, I tried it now, I activated it, loaded…

Do these multis have the phono jack socket for the current sensor? If so pop in a small phono jack or screwdriver and give it a wiggle.

Parallel Multiplus II with residual consumption from Grid when charging battery

DIY

nickdb (Nick) 4 September 2025 15:14 9

Maybe try run this on your cerbo. It should help see where the issue is. I would swap masters as a test as well.

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Parallel Multiplus II with residual consumption from Grid when charging battery

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