SolaX TP58 BMS Parallel Box G2: The Scalable Battery Bridge for High-Capacity Energy Systems

When you're ready to push your solar storage to the next level, the SolaX TP58 BMS Parallel Box G2 makes it possible. Designed to connect two parallel battery stacks, it enables homeowners and commercial users to build larger, smarter energy storage systems with ease , all while retaining full SolaX inverter compatibility.

This compact yet powerful accessory is engineered for the SolaX Triple Power battery range, making it the go-to solution for anyone expanding beyond a standard 3-4 battery setup. It’s also essential when pairing large-capacity battery arrays with the high-performance SolaX X3 Ultra inverters.

Double the Capacity with Dual Stack Configuration

The TP58 BMS Parallel Box G2 supports dual-stack architecture, enabling up to 16 batteries (two stacks of eight) to operate in a single, cohesive system. This allows a total energy capacity of up to 46.1kWh using Triple Power Master and Slave batteries.

• Connects two battery branches via one inverter
• Supports large solar installations needing extra autonomy
• Maintains real-time BMS communication across both stacks

Designed for Compatibility with SolaX Hybrid Inverters

This parallel box has been engineered specifically for integration with the SolaX X1 and X3 Hybrid series, as well as the X3 Ultra range. It ensures safe load balancing and synchronised control across both battery stacks. By using SolaX-approved accessories, users avoid incompatibility issues and ensure warranty protection.

Whether you’re installing in a large home or a light commercial unit, this box bridges the gap between ambition and reality.

Smart Load Management Built In

The BMS Parallel Box doesn’t just connect , it communicates. It manages data across both stacks, delivering real-time updates to your hybrid inverter. This results in improved efficiency, balanced discharging, and safer long-term operation.

• Improves lifecycle performance of each battery module
• Supports tariff-based charge/discharge scheduling via inverter app

Safe and Certified for Home and Commercial Use

The TP58 Parallel Box G2 complies with SolaX’s high safety standards and is CE-certified for use across the UK and EU. With a compact wall-mountable design and plug-and-play connectors, it offers minimal install disruption for retrofit and new systems alike.

• CE certified for UK and EU installations
• Passive cooling and rugged housing for longevity
• Low-maintenance once installed

Why Evergy Recommends This Product

For customers looking to expand their SolaX Triple Power Master and Slave battery setups, this parallel box is an essential component. It enables scalable storage up to commercial-grade levels, all without changing your core inverter setup.

• Supports future upgrades , ideal for growing energy needs
• Integrates natively with all key SolaX Hybrid and Ultra inverters

Ideal for Larger Homes and Light Commercial Systems

This product is ideal for properties that require backup autonomy, work-from-home reliability, or commercial premises with daytime load demand. Whether you're retrofitting a PV system or designing one from scratch, it unlocks flexibility.

Technical Specifications (Core Highlights)

• Compatible batteries: SolaX Triple Power 5.8kWh (Master + Slave)
• Max configuration: 2 stacks of 8 batteries (16 total)
• Dimensions: Approx. 270 x 200 x 60mm
• For full spec see specification tab or product datasheet

Designed for Smart Tariff Integration

When used alongside SolaX Hybrid inverters, this unit supports tariff-based charge/discharge strategies , helping you optimise your savings with off-peak charging and solar self-consumption models.

Expand Smarter , What’s Next?

Pair the TP58 Parallel Box G2 with our range of solar batteries, or explore compatible inverters for your next installation. For mounting solutions and real-time metering, browse our mounting range and optimisers.

FAQs

Can this be added to an existing battery system?
Yes -  it’s ideal for retrofitting to existing SolaX Triple Power systems to double capacity.

Do I need two master batteries?
No -  only one master is required across the dual-stack configuration, with up to 15 slave batteries in total.