Hybrid Inverter Multisolar Three-Phase 15 kVA – Multisolar-II-15KW

Multisolar II 15kVA three-phase: the hybrid inverter for self-consumption + storage

The Multisolar II 15kVA is a three-phase hybrid inverter designed to power your appliances, manage battery charging and discharging and, if necessary, use a grid connection as a backup. Its IP65-rated housing and built-in WiFi make monitoring and installation easy, whether indoors or in dusty/damp environments.

Key features (what sets it apart)

• IP65: suitable for a wide range of installation conditions
• 2 MPPT: optimisation across two distinct orientations/strings
• Built-in WiFi: monitoring via app/software
• High battery charging: up to 300 A
• Parallel connection: up to 6 units (up to 90 kW)
• BMS port (RS485): dedicated battery communication
• IntegratedAC coupling
• 150% unbalanced load (more flexible three-phase usage)

3 operating modes (depending on your energy priority)

Installation (brief overview)

• Provide a three-phase 230/400 VAC installation and suitable protection (AC/DC, surge arrester, isolator).
• If using the backup system, isolate priority circuits via a dedicated distribution board.
• Check battery/BMS compatibility (RS485 port) and charge current/voltage settings.

Related Wattuneed guides (internal)

• Comprehensive guide to hybrid inverters: comparison & advice
• AC Coupling: 6 configurations (adding storage)
• Neutral and CPI diagram in backup mode

Multisolar II 15kW hybrid inverter: ease of use and performance

With an IP65 protection rating, the Multisolar II 15kVA is suitable for both outdoor applications and indoor environments where atmospheric humidity and dust are present. Parallel operation of up to 6 units for greater power and capacity allows for an output of up to 90kW. This makes it possible to create energy solutions for homes, offices and small commercial buildings.

High-performance three-phase MultiSolar II inverter for managing a hybrid electrical installation. 

Connect solar panels, batteries, and optionally a grid connection to power your system.

Enjoy top performance thanks to two integrated independent MPPT trackers, as well as ease of use thanks to its compact design and intuitive display.

• Water and dust resistance (IP65) makes the inverter suitable for a wide range of operating conditions.
• Built-in WiFi for mobile monitoring (an app is available).
• Supports 150% unbalanced load
• Optional dual output for smart load management (check sales)
• Integrated AC coupling function
• User-adjustable load current and voltage
• Dedicated communication port for BMS (RS485)
• Parallel operation of up to 6 units

3 operating modes

• Solar priority
• Backup
• Solar and grid


- Adjustment of battery charging current
- Option to limit or disable charging via the grid
- Input voltage from 170 to 290V per phase
- Economy mode (limiting self-consumption)
- Fine-tuning of battery charging characteristics
- Automatic restart in the event of overload or overheating
- Option to limit battery discharge to preserve battery life
- Configurable return voltage in battery mode
- Low battery safety

Use in backup mode

The inverter can be used as a "back-up" without photovoltaic panels. In this mode, the inverter acts as a UPS to protect your devices from mains power cuts.

The inverter thus protects computers and audio-visual equipment, or any other sensitive load, by supplying a stable current. It guarantees an uninterrupted power supply to consumers.
The electricity produced by these pure sine wave inverters is stable. 

You can choose to protect just one or several rooms in your home via the distribution box.

Off-grid use

In this configuration, the inverter uses the solar panels to power appliances and charge the batteries when the sun is shining. The inverter draws power from the batteries to ensure energy supply at night. 

It is possible to connect a generator to the inverter’s AC input to provide a backup power supply.

Hybrid mode

The inverter draws power from the grid only if the batteries are empty and solar generation was insufficient to cover consumption.

The inverter never feeds power back into the grid.

As with ‘back-up’ mode, it is possible to connect only part of your domestic installation to the inverter. Appliances connected to the inverter will always be powered, even in the event of a mains power cut. What’s more, these appliances will be powered for free!

Pure Sine Wave Inverter

The Multisolar II is a pure sine wave inverter that produces power of a quality similar to that of the mains grid. It can be used to power all types of appliances.

Maximum load current of 300 A

The Multisolar II incorporates an MPPT charge controller capable of delivering a maximum charge current of 300 A

MPPT controller

The Multisolar II also features MPPT (Maximum Power Point Tracking) technology, meaning it constantly searches for the maximum power point, thereby enabling the best performance to be drawn from the photovoltaic panels. As well as boosting the energy output of a system, it optimises battery charging and extends their lifespan. It scans the panel voltage to find the maximum power output point and is able to adjust the voltage supplied by the panel to match the voltage the battery can accept.

Option to select operating mode via timer

You can set your device’s operating mode using a timer. Set your own time slot in the settings.
With this setting, you can define the priority of your inverter’s output source, for example, to choose to charge your batteries during off-peak hours.

Software 

SolarPower 1.20SP10

• SolarPower MAC AMD
• SolarPower MAC ARM
• (32-bit) Linux
• (64-bit) MAC
• Windows
• Manual