SolaX Triple Power X-ESS BMU 3 MCS0600

SolaX Triple Power X-ESS BMU-3: The Smart Control Hub for Multi-Battery Solar Storage Systems

When expanding a SolaX battery storage system beyond a single unit, the BMU-3 becomes essential. Acting as the master control interface for up to four high-voltage X-ESS batteries, this lightweight but powerful component ensures reliable performance, communication, and system safety at scale. It’s compact, efficient, and purpose-built for seamless solar integration.

Central Control for Battery Expansion

The BMU-3 enables you to connect two or more SolaX Triple Power X-ESS 3kWh batteries together, managing charge/discharge behaviour and maintaining system stability. This unit ensures balanced communication between the battery stack and your inverter, offering real-time monitoring and performance optimisation.

• Controls up to four HV10230 battery modules
• Essential for systems exceeding 3kWh
• Optimised for SolaX Hybrid G4 inverters

Reliable Communication and Smart Integration

The BMU-3 features dual communication ports (RS485 and CAN) to provide faultless data transfer between batteries and the inverter. It ensures safe operation and accurate system reporting, a critical element when managing stored energy across multiple battery modules.

• RS485 and CAN 2.0 interface support
• LED indicators for charge levels and working mode
• Plug-and-play compatibility with SolaX batteries

Compact, Durable and Installation-Friendly

With a slimline profile and weighing just 7.5kg, the BMU-3 is easily wall-mounted alongside your battery bank or inverter. Its IP65 rating means it can be installed indoors or outdoors, giving you more flexibility when planning system layout, especially in retrofits or tight utility spaces.

Designed for Safe, Long-Term Use

The BMU-3’s purpose is more than just coordination, it plays a central role in the safety of the battery system. With built-in system switches and support for battery protection protocols, it ensures stable performance during charging, discharging, and communication with your SolaX hybrid inverter.

• System switch with integrated breaker
• Robust lithium battery protection design
• Certified to CE, UN38.3 and UKCA standards

Why Evergy Recommends This Product

If you're installing more than one SolaX X-ESS 3kWh battery, the BMU-3 is non-negotiable. It’s your system’s command centre, giving you the flexibility to grow your energy storage while protecting your investment. Pair it with a SolaX hybrid inverter and solar panel system for a complete, smart-ready solution.

Best Fit Applications

The BMU-3 is perfect for households or light commercial setups planning to build a battery bank larger than 3kWh. Whether you're preparing for an EV charger, time-of-use energy tariffs, or simply want more self-sufficiency, this unit enables safe expansion with full control.

Key Technical Specifications

• Model: MCS0600
• Dimensions: 482.5 × 173.5 × 153 mm
• Weight: 7.5 kg
• IP Rating: IP65 (indoor/outdoor)

Additional technical details are available in the datasheet tab.

Expand Your System

Looking to scale up? Combine this unit with multiple X-ESS 3kWh batteries, and if needed, consider inverter options like the Fox ESS R75 or R110 for more demanding sites.

Frequently Asked Questions

Q: Do I need a BMU-3 if I’m only using one battery?
No, a single X-ESS 3kWh battery does not require a BMU-3. It’s only needed when installing two or more units.

Q: Where should I install the BMU-3?
It can be wall-mounted either indoors or outdoors thanks to its IP65 protection rating. It’s usually placed near the battery bank or inverter.

Q: Is it compatible with other battery brands?
No, the BMU-3 is specifically designed for use with the SolaX Triple Power X-ESS series and is not cross-compatible with other brands.

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