
SOLAX BMS Parallel Box G2 - T58 Batteries Only
SOLAX BMS Parallel Box G2 - T58 Batteries Only
SOLAX BMS Parallel Box G2 - T58 Batteries Only
SolaX BMS Parallel Box G2 — Doubles a T58 system — T58 only, and it needs the master battery.
The Parallel Box G2 exists to get past the battery limit of a single BMS. It carries two modules in one case and alternates between them, which both increases the system's capacity and extends the working hours — and, because the modules take turns, prolongs battery life.
About the SolaX BMS Parallel Box G2
It suits the X1 and X3 hybrid inverters. On single phase it supports 2, 4 or 6 Triple Power 5.8 kWh batteries; on three phase it supports 4, 6 or 8.
Those are minimums as well as maximums. A minimum of two batteries on single phase and four on three phase must be used with this product — it is not a way of adding one battery to a system.
The G2 differs from the G1 in one important way: it requires the T58 master battery, HV-T-BAT-H-58-MASTER-V2, which is what makes it easier to retrofit to an existing system. It is a T58 product only and will not extend a T30 stack.
What does this fit?
This is the dual-module box that doubles a T58 system's storage.
T58 batteries only. Both configurations require the T58 master battery, HV-T-BAT-H-58-MASTER-V2. There are minimum counts as well as maximums: at least two batteries on single phase and at least four on three phase.
The products it is ordered with:
What the job needs
The details that decide whether this suits the system:
- T58 batteries only. Both configurations require the master battery, HV-T-BAT-H-58-MASTER-V2.
- X1 single phase: 2, 4 or 6 Triple Power 5.8 kWh batteries. X3 three phase: 4, 6 or 8.
- Minimums apply: 2 batteries on single phase, 4 on three phase.
- It will not extend a T30 stack — a T30 system has no T58 master.
- Dual module in one case, alternating use, IP55.
- Refer to the installation manual on this listing for the full configuration rules before ordering.
Where this earns its place
The BMS Parallel Box G2 is specified most often for these jobs.
Things worth knowing about this listing
- T58 batteries only. Unlike the G1 version, the G2 requires the T58 master battery (HV-T-BAT-H-58-MASTER-V2), which makes it easier to retrofit to an existing system.
- A minimum of 2 batteries on single phase and 4 batteries on three phase must be used with this product. X1 single phase takes 2, 4 or 6 Triple Power 5.8 kWh batteries; X3 three phase takes 4, 6 or 8.
SolaX BMS Parallel Box G2 technical data
Questions we get asked about this inverter
Will it work with T30 batteries?
No. This is a T58 product and both configurations require the T58 master battery, HV-T-BAT-H-58-MASTER-V2.
How many batteries do I need?
At least two on single phase (2, 4 or 6) and at least four on three phase (4, 6 or 8). These are minimums, not just maximums.
What is different about the G2?
Unlike the G1, the G2 requires the T58 master battery, which makes it easier to retrofit to an existing system.
Why does alternating between modules matter?
The two modules take turns rather than both working continuously, which extends battery life as well as the system's working hours.
Documents, advice and trade pricing
Every datasheet, certificate, installation manual and warranty document we hold for this product is in the Documents tab below. See the rest of our storage range, our hybrid inverters and our batteries, or email sales@clearraysolar.com if you would like us to check a pairing before you order.
Build your complete solar system
Everything you need in one place.
- Inverters
- Batteries
- Mounting Systems
- Cabling & Accessories
- Protection Devices
Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.

