We guide you through VEConfigure, ESS assistant installation, UK grid code selection, DVCC battery setup, and VRM verification — via screen share or VRM remote console.
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What commissioning involves. Unlike single-box hybrid inverters that use a setup wizard, the MultiPlus-II requires manual configuration via VEConfigure — a desktop application that connects via MK3-USB adapter or VRM remote console. You need to install the ESS assistant, select the UK grid code, set charge and input current limits, and configure DVCC on the Cerbo GX for battery communication. Each step depends on the previous one being correct.
This guide covers a standard UK grid-connected ESS installation with a MultiPlus-II, Cerbo GX, MPPT solar charger, and third-party lithium battery. Complete each step in order — the ESS assistant depends on correct basic parameters, and DVCC depends on the ESS assistant being installed.
VEConfigure is a Windows desktop application (also accessible via VRM remote console). Connect to the MultiPlus-II and set the foundational parameters:
Connection methods: MK3-USB adapter plugged into the VE.Bus port (direct laptop connection), or VRM remote console if the Cerbo GX is already online. VictronConnect Bluetooth cannot install assistants.
The ESS assistant is mandatory for grid-connected battery storage. Without it, the system operates in passthrough only:
The ESS assistant replaces any previous assistants. If you need to change settings later, you must re-run the assistant from scratch — it cannot be edited incrementally.
UK grid-connected inverters must comply with Engineering Recommendation G98 or G99:
In VEConfigure under the Grid tab, select the appropriate UK grid code. The frequency and voltage trip thresholds are set automatically — do not modify them manually unless you have a specific DNO requirement documented in writing.
If you are unsure which grid code applies, check the total inverter AC output rating. The relevant value is the continuous AC output VA rating, not the DC input or solar capacity.
DVCC lets the battery BMS control the system dynamically. This step happens on the Cerbo GX, not in VEConfigure:
After enabling DVCC, verify that the CVL/CCL/DCL values shown on the battery device page are reasonable — CVL should be near the absorption voltage, CCL and DCL should match the battery's rated charge and discharge current.
Commissioning isn't complete until you've verified the system operates correctly end-to-end:
Monitor the first 24–48 hours on VRM. Check the daily energy summary to verify solar yield, battery throughput, self-consumption ratio, and grid import/export match expectations. See our VictronConnect & VRM setup guide if VRM is not yet configured.
Most hybrid inverters from brands like Sunsynk, Lux, or GivEnergy use a built-in setup wizard that walks through the essential settings in 10–15 minutes. The MultiPlus-II has no wizard — it's a component-based system where the inverter-charger, solar charger, battery monitor, and GX device are all separate products that need to be configured individually and then integrated. VEConfigure is powerful but assumes technical knowledge. The ESS assistant is not installed by default. Grid code settings must be selected manually.
The trade-off is flexibility. A correctly commissioned MultiPlus-II system can do things no single-box inverter can — parallel and three-phase configurations, multiple AC inputs (grid + generator), advanced ESS scheduling, and integration with virtually any lithium battery via DVCC. But that flexibility means there are more settings to get right, and more places for a misconfiguration to hide. In our experience, about 30% of Victron support requests trace back to a commissioning error rather than a hardware fault — usually a missing ESS assistant, incorrect AC input limit, or DVCC not being enabled.
We guide you through VEConfigure, ESS assistant installation, UK grid code selection, DVCC battery setup, and VRM verification — via screen share or VRM remote console.
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