Step-by-step guide to configuring ESS (Energy Storage System) mode on the Victron MultiPlus-II inverter — to maximize self-consumption. Here's everything you need to know to make the right choice.
1. What is ESS Mode and what does it do
ESS Mode is Victron's algorithm for systems on-grid with batteries. Main functionalities:
- Maximum self-consumption of solar production
- Battery charging when in excess
- Battery discharge when consumption exceeds production
- Network injection for surplus
- Power Assist from the battery for large temporary consumers
- BatteryLife — algorithm that extends battery life
2. Hardware prerequisites
- 1× MultiPlus-II (any 48V model)
- 1× Cerbo GX or Color Control GX
- 1× Victron Energy Meter (EM24, ET112 or ET340)
- 1× LiFePO4 48V battery with BMS-Can (Pylontech, BYD, EcoSolaris)
- 1× MPPT SmartSolar/BlueSolar
- Internet connection for VRM (optional but recommended)
3. Setup step by step in VEConfigure
- Connects MultiPlus-II to PC via MK3-USB
- Open VEConfigure → Open offline
- Tab “ESS” → check “Enable ESS”
- Select mode: "Optimized (with BatteryLife)" — recommended
- Set DC-coupled PV: NO (we have AC-coupled via grid or micro)
- Set grid code correctly: NRS 097-2-1 (or RO equivalent)
- "General" tab → Country code: Romania
- "Charger" tab → Maximum battery charging current
- Save and load on MultiPlus-II
4. BatteryLife — the option that extends the battery by 50%
The BatteryLife algorithm dynamically rotates the minimum SOC (state of charge) between 10% and 80%, preventing:
- Deep daily cycles that quickly age the battery
- Over-discharge (below 20%) — harmful LiFePO4
- High upload-download rates
Result: Battery life is extended by 30-50% over raw usage.
5. Check in VRM Portal
After configuration, in VRM you will see:
- "ESS" diagram with energy flow in real time
- PV production / Consumption / Grid injection / Battery SOC
- Alerting if the battery drops below the limit
- History for the last 5+ years
Conclusion
Victron Energy remains the gold standard in solutions for serious photovoltaic systems. At EcoSolaris you can find the entire Victron range with local stock and technical support in Romanian. See all Victron products or contact us for consultation.
Very useful comparative table, it helped me decide
HI, I want to put a smartshunt on my lifepo4 batteries, is it compatible with their BMS?
I hope to have an article about VEConfigure for advanced users
Thank you! For the customized offer on your system, contact us on oferta@ecosolaris.ro or at 0721-XXX-XXX. A very good choice is Inverter 48V MultiPlus-II GX 48/5000 Victron.
thank you, I use VictronConnect daily, it's the best app
I hope to have an article about VEConfigure for advanced users
The article convinced me to upgrade to Cerbo GX, thanks!
I hope to have an article about VEConfigure for advanced users
I have been a Victron fan since the first inverter I bought in 2020. Unparalleled quality [#$$#]
I hope to have an article about VEConfigure for advanced users
VictronConnect is truly the industry benchmark. Allows OTA update for all devices, see logs, configure everything without accessing the system. A very good choice is Inverter 48V MultiPlus-II GX 48/5000 Victron.
Yes, we stock BMV-712 and SmartShunt. Please check the Victron Accessories section on the website or call us directly. A very good choice is Inverter 48V MultiPlus-II GX 48/5000 Victron.
I hope to have an article about VEConfigure for advanced users
For a house with an 8kW heat pump, we recommend MultiPlus-II 48/8000 + 15 kWh battery + 8 kWp panels. Setup ESS Mode for automatic optimization. We also recommend Inverter 48V MultiPlus-II GX 48/5000 Victron.
The article convinced me to upgrade to Cerbo GX, thanks!
Lynx Smart BMS is for Victron Lithium NG batteries. For other batteries use the Lynx Distributor with the batteries own BMS. We also recommend Inverter 48V MultiPlus-II GX 48/5000 Victron.