Dynamic ESS will not enable on Multi RS Solar 3-phase system (stuck on “Loading…”)

Q&A and troubleshooting DESS
, , , ,
1

Hello everyone,

I am having an issue where Dynamic ESS will not successfully enable on my Victron system. I am hoping someone with experience (or Victron staff) can advise.

System overview

  • Inverters:

    3 × Victron Multi RS Solar (3-phase ESS system)

  • GX device:

    Cerbo GX (recent Venus OS, Dynamic ESS available)

  • Battery:

    NKON ESS ~ 32.15 kWh, CAN-bus BMS (Seplos)

  • Grid connection:

    3-phase, external grid meter installed and working

  • PV:

    DC-coupled via Multi RS Solar

  • Loads:

    All loads connected to the AC output (critical loads)

  • UPS / backup power:

    Enabled and tested — works correctly during grid outage

Battery data (live from Cerbo GX)

  • Voltage: ~52–57 V

  • Charge Current Limit (CCL): ~185 A (at higher SoC)

  • Discharge Current Limit (DCL): 280 A

  • Max discharge power: ~16 kW

  • Max charge power: controlled by BMS

Local ESS configuration

  • ESS mode: Optimized with BatteryLife

  • Minimum SoC: 25%

  • System operates perfectly stable without Dynamic ESS

Dynamic ESS configuration (VRM)

System

  • Energy export allowed: Yes

  • Max import power: 17 kW

  • Max export power: 17 kW

  • Operating mode: Green mode

Battery

  • Capacity: 32.15 kWh

  • Max charge power: 16.1 kW

  • Max discharge power: 16.1 kW

  • Battery cost: 0.01 €/kWh

Energy prices

  • Country: Netherlands

  • Supplier: Zonneplan

  • Pricing: Dynamic

  • Buy & sell formula:

    (P + 0.01653 + 0.1088) × 1.21

  • Negative prices allowed

All settings are saved and validated in VRM.

Problem description

When I enable Dynamic ESS from the VRM dashboard:

  • The system shows “Loading…”

  • Sometimes I see “Turning on in …”

  • ESS modes become greyed out (external control appears active)

  • Dynamic ESS never fully activates

  • Even after 15+ minutes, the status does not change

  • No error messages are shown

  • Battery behavior becomes inconsistent (sometimes discharging, sometimes idle)

Dynamic ESS never reaches a stable “active” state.

What I have already tried

  • Rebooting the Cerbo GX

  • Waiting until local ESS (BatteryLife) is active again

  • Turning Dynamic ESS ON again

  • Waiting >15 minutes without touching the system

  • Verifying ESS and grid metering configuration

  • Testing backup power / UPS (works correctly)

Result: same behavior every time.

Questions

  1. Is this a known issue with Dynamic ESS on Multi RS Solar, especially during first activation?

  2. Are there additional requirements or checks specific to the RS Solar platform?

  3. Is there a way to reset or clear the Dynamic ESS state (GX or VRM side)?

  4. Is anyone successfully running Dynamic ESS on a 3-phase Multi RS Solar system, and if so:

    • Venus OS version?

    • ESS / DESS settings?

Any guidance would be greatly appreciated.

Thank you in advance.

2

I have read dess need time to adjust and collect the various settings and data…

But maybe that’s true for a working dess…