Victron EasySolar-II 48/4k5/55-32 MPPT 250/70 GX

The Victron EasySolar-II 48/4k5/55-32 MPPT 250/70 GX combines the key components of a high-performance 48-V solar and storage system in a single unit. It integrates a MultiPlus-II inverter/charger, a SmartSolar MPPT 250/70-Tr solar charge controller, and a GX unit for system control and remote monitoring.

The components are internally connected and coordinated with one another. This reduces the amount of external cabling required compared to a setup with a separate inverter, battery charger, solar charge controller, and GX controller. The EasySolar-II GX thus serves as a compact system foundation for off-grid systems, backup power solutions, and grid-connected ESS applications.

The Key Benefits

• Integrated System Solution: The MultiPlus-II, SmartSolar MPPT, and GX controller are housed in a single enclosure.
• 4k5 performance class: 4 kW continuous power and up to 4.5 kW for two hours during a cold start.
• High power reserves: 6 kW for 25 minutes and 7 kW for one minute support high loads and inrush currents.
• Higher-wattage AC charger: With a charging current of up to 55 A, the new model charges compatible 48-V batteries using mains, shore power, or generator power.
• MPPT 250/70-Tr: The built-in solar charge controller handles up to 4,000 W of PV power.
• PowerControl and PowerAssist: Limited AC power sources can be combined with battery power in a controlled manner.
• GX Control Panel: Local monitoring, VRM remote access, and the integration of compatible BMS batteries are already set up.
• Expandable: Parallel and three-phase systems can be set up using VE.Bus.

New 4k5 performance class with high continuous load capacity

The EasySolar-II 48/4k5 delivers a continuous output of 4 kW at 25 °C. Its particular strength lies in its long-term power reserve: During a cold start, 4.5 kW is available for up to two hours. This means that the 4k5 power class is clearly more than just a short-term peak rating and is also suitable for longer periods of high load.

For even higher loads, the inverter delivers up to 6 kW for 25 minutes during a cold start. The peak power output is 7 kW for one minute. These reserves are particularly helpful for loads with high inrush current or temporary high power demands.

Compared to the previous EasySolar II 48/3000 model, the new 4k5 generation offers significantly more usable inverter power. This expands the range of applications to include larger loads and reduces the risk that the system will reach its performance limit prematurely during prolonged periods of high load.

55-A Charger for Mains, Shore Power, and Generator Power

The built-in AC battery charger has also been significantly upgraded compared to the previous 48/3000 model. At 25 °C, it delivers up to 55 A battery charging current instead of the previous 35 A. At 40 °C, up to 50 A is available.

The higher charging power reduces the required charging time, provided that the battery and AC source can handle or supply the corresponding current, respectively. This is particularly advantageous for systems with a generator, shore power, or a grid connection that is available only for a limited time. With the EasySolar-II GX, the high-performance AC charger complements the integrated MPPT solar charge controller, allowing both solar energy and an external AC source to be used to charge the battery storage system.

Transfer switch and two AC outputs

The built-in 32-A transfer switch handles the switchover between the existing AC source and the battery supply. In the event of a failure in the utility, shore, or generator power supply, the loads connected to the main output can continue to be powered by the battery system.

AC-Out-1 for loads with an uninterruptible power supply

AC-Out-1 serves as the system's main output. When an AC source is available, the devices connected to it are powered through this output. If this source fails, the inverter takes over and supplies power from the battery.

AC-Out-2 for loads that can be selectively shut off

The additional AC-Out-2 is active only when mains, off-grid, or generator power is present at the input. This allows, for example, water heaters, chargers, or other high-power loads to be automatically excluded from battery operation.

PowerControl and PowerAssist

PowerControl allows you to specify the maximum load that can be placed on a limited AC source. The EasySolar-II GX takes the connected loads into account and uses only the available power to charge the battery.

PowerAssist temporarily supplements a weak grid, shore, or generator supply with energy from the battery. If the power demand exceeds the available input power, the inverter automatically supplies the difference. When power consumption drops again, the excess power can be used to charge the battery.

SmartSolar MPPT 250/70-Tr

The integrated SmartSolar MPPT 250/70-Tr efficiently converts the energy from the PV generator into battery charging current. It delivers a maximum output current of 70 A and is designed for up to 4,000 W of PV power in a 48-V battery system. The solar charge controller’s maximum efficiency is 99%.

The DC output of the MPPT solar charge controller is internally connected to the DC terminal of the inverter/charger. The shared on/off mechanism simplifies operation and ensures that the components function as a coordinated system.

GX Device, Display, and Remote Monitoring

The integrated GX unit monitors the MultiPlus-II, the SmartSolar MPPT, and other connected system components. A backlit 2 × 16-character display shows key battery, inverter, and solar charge controller data directly on the unit.

Wi-Fi, Ethernet, and a simple Bluetooth connection are available for local and remote access for configuration purposes. The free Victron Remote Management Portal allows you to remotely view operating data, energy flows, system messages, and historical values. With the appropriate authorization, you can also make changes to the system configuration.

Interfaces for System Integration

• BMS-Can for compatible, communicating batteries
• VE.Bus for inverters/chargers, parallel operation, and three-phase systems
• VE.Direct for compatible Victron components
• Ethernet and Wi-Fi for local access and VRM
• Bluetooth for Basic Configuration Tasks
• USB port
• Two programmable analog or digital input/output ports
• Programmable Relay and Remote On/Off

Pytes Batteries with the EasySolar-II GX

Pytes is listed by Victron as a tested battery integration solution and is therefore particularly well-suited for setting up a coordinated 48-V energy storage system. Communication between the Pytes battery and the EasySolar-II GX takes place via the BMS CAN connection at 500 kbit/s. This allows the battery to transmit charge and discharge limits, state of charge, and error messages to the GX system.

The CAN bus BMS cable specified in the Victron and Pytes documentation is required for the connection. During commissioning, the latest GX and battery firmware, the correct CAN settings, and DVCC must be taken into account. The number and capacity of the battery modules must be compatible with the inverter power, the maximum charge and discharge currents, and the intended load profile.

Suitable Applications

Off-grid systems and self-sufficient buildings

The EasySolar-II GX is ideal as a central power unit for larger community gardens, hunting cabins, mountain huts, alpine huts, tiny houses, and remote farm buildings. A PV generator, battery, and an existing generator can all work together within a single system.

Home Energy, ESS, and Backup Power

In a grid-connected ESS, excess solar energy can be stored and used later for self-consumption. In the event of a power outage, the inverter continues to supply power to the designated loads. To manage self-consumption, the system can use data from a compatible energy meter or the optional external AC current sensor.

Boats, Vehicles, and Mobile Equipment

PowerControl and PowerAssist make the device an attractive option even for larger boats, adventure vehicles, mobile workshops, and similar 48-volt systems. Limited shore power, grid power, or generator power can be supplemented with battery power without unnecessarily overloading the available input source.

Agriculture and Commerce

The EasySolar-II GX can also be used in smaller commercial and agricultural energy systems, for example, to power remote buildings, provide backup power, or combine photovoltaic systems, battery storage, and a generator.

Technical Specifications

Conclusion

The Victron EasySolar-II 48/4k5/55-32 MPPT 250/70 GX is a powerful and user-friendly system foundation for off-grid and grid-tied 48-V energy systems. Compared to the previous 48/3000 model, the new generation offers significantly more usable inverter power and an AC battery charging current increased from 35 A to 55 A.

When combined with a properly sized Pytes battery, this creates a networked energy storage system for off-grid operation, self-consumption, backup power, and the integration of limited grid, on-site, or generator sources.

Frequently Asked Questions About the EasySolar-II 48/4k5 GX

• What components are included in the EasySolar-II GX?

  
  

  The unit includes a MultiPlus-II inverter/charger, a SmartSolar MPPT 250/70-Tr solar charge controller, and a GX unit for system control and remote monitoring. The components are internally connected to one another.

• Why is the device called 4k5?

  
  

  The inverter delivers 4 kW of continuous output power at 25 °C. However, during a cold start, 4.5 kW for up to two hours available. This power level, which can be sustained for a long time, differs significantly from a typical brief burst of peak power.

• What is the advantage of the more powerful 55-A charger?

  
  

  The AC charger can charge a compatible 48-V battery at up to 55 A using mains, shore power, or generator power. Compared to the previous 35-A charger, the charging time is significantly reduced, provided that the battery, wiring, and AC source are rated for the higher charging current.

• Is the EasySolar-II GX compatible with Pytes batteries?

  
  

  Yes. Pytes is listed by Victron as a tested battery integration solution. Communication takes place via BMS-Can at 500 kbit/s. Firmware, CAN connection, DVCC settings, and battery size must be configured in accordance with Victron and Pytes specifications.

• Does the EasySolar-II GX have a display?

  
  

  The device features a built-in, backlit 2 × 16-character LCD display. It does not have an HDMI port for an external GX Touch Display. A smartphone, tablet, or computer can be used for graphical operation.

• What is the maximum size of the connected PV generator?

  
  

  The integrated MPPT 250/70-Tr is rated for a maximum PV power of 4,000 W. The maximum PV open-circuit voltage is 250 V and must not be exceeded, even at low module temperatures.

• Can the device continue to supply power during a power outage?

  
  

  Yes. In a properly configured system, AC-Out-1 continues to power the designated loads from the battery in the event of a failure of the external AC source. AC-Out-2 is shut down during battery-only operation.

• Can the EasySolar-II GX be used in an ESS?

  
  

  Yes. The integrated GX unit supports the ESS functions required for self-consumption, battery storage, and backup power. For grid-parallel operation, the correct country code and project-specific settings must be configured.

• Are parallel and three-phase systems possible?

  
  

  Yes. Using VE.Bus, multiple compatible devices can be configured for parallel or three-phase operation. Planning, wiring, and programming must be performed by a qualified professional.