SolaX Triple Power home battery installation: what the job involves

Video reference. "Solax Triple Power Battery Storage Installation" is from SolaX Power, covering the physical installation of a Triple Power battery module: base bracket fitting, correct module orientation (the video explains why fitting the battery the wrong way up creates problems), cable connections and the importance of planning the installation position before the unit goes on the wall.

1. Surveying the site and choosing the coupling method

SolaX Triple Power T-BAT batteries are high-voltage LFP (lithium iron phosphate) modules. They are designed to DC-couple directly to a SolaX X-Hybrid inverter, which handles both the solar DC input and the battery DC bus in a single unit. For homes with an existing solar inverter from another brand, a SolaX AC-coupled inverter can be added alongside it, with the battery coupling via AC rather than DC.

The installer reviews the existing solar hardware and consumer unit, confirms whether DC or AC coupling is the right approach, and sizes the battery capacity against the household's daily consumption and solar output. The coupling decision affects the cable routing, the consumer unit ways required, and the commissioning sequence.

2. Mounting the battery modules

Triple Power T-BAT modules are mounted in a vertical stack. The lowest module sits on a base bracket fixed to the wall; upper modules are added on top using the module-to-module coupling mechanism. The wall and fixings are checked to confirm they can carry the combined stack weight before the first module goes up.

Module orientation matters: the SolaX installation guide specifies which face of the module must face upward. Fitting a module inverted prevents the internal connections from mating correctly and can cause electrical faults. Cable entry points for the battery output, communication bus, and AC or DC connection to the inverter are planned before the modules are mounted so cable routes are clean.

3. Connecting the battery modules and wiring to the inverter

Battery modules are linked in series via high-voltage DC bus connectors. The installer checks polarity and mechanical engagement at each connection before adding the next module. All terminal torques match the values in the SolaX installation manual. The stack's output connects to the battery input terminals of the SolaX X-Hybrid inverter via cable sized for the battery's maximum discharge current and the route length.

For AC-coupled installations, the SolaX inverter's AC output connects via a dedicated AC circuit rather than a DC battery cable. The physical battery module connections are the same either way.

4. Running the AC supply cable to the consumer unit

The inverter's AC output connects to the consumer unit via a dedicated circuit. Twin-and-earth cable is sized to keep volt drop within the BS 7671 Regulation 525 limit for the route length and installation method. An RCBO or MCB sized for the inverter's rated current protects the circuit at the board. Polarity and earth continuity are checked before the board cover is replaced and the circuit schedule is updated.

5. Fitting and orienting the CT clamp

A CT clamp on the grid import conductor gives the SolaX system real-time visibility of whether the household is importing from or exporting to the grid. The inverter uses this reading to control charging, discharging and export. Fitting the clamp in the wrong orientation inverts import and export, causing the battery to charge from the grid during the day instead of from surplus solar.

The installer confirms the CT clamp is registering the correct sign convention by checking the live reading in the SolaX monitoring portal before commissioning continues.

6. Commissioning on SolaX Cloud and notifying Part P and DNO

With all connections complete and dead tests passed, the installer powers up the system and steps through the SolaX commissioning wizard. Self-use mode, time-of-use charge schedules, export limits and backup settings are configured for the household's tariff and requirements. A test charge and discharge cycle confirms the system operates as expected and responds correctly to CT clamp readings.

The installation is notified through the installer's Part P competent person scheme and you receive an Electrical Installation Certificate. DNO notification follows G98 for systems exporting up to 3.68 kW per phase, with the DNO notified within 28 days. Larger or three-phase systems need G99 pre-approval before the work starts. Keep both documents with your property records.

When to call us

Richard installs home battery storage systems across east Kent, including SolaX and other brands. He handles the battery module installation, AC supply wiring, CT clamp, SolaX Cloud commissioning, Part P certification and DNO notification. Get in touch for a free fixed quote.