Installing a Sigenergy home battery system: what the job involves

Video reference. "Sigenergy Solar System Installation With Full Home Backup | Alps Electrical Ltd - Teesside" is from Alps Electrical, a multi-award-winning MCS-accredited electrical firm based in the North East of England. The video follows a complete Sigenergy solar and battery installation from mounting and cabling through to commissioning and a demonstration of the whole-home backup capability.

1. Surveying the installation site and assessing the electrical supply

The installer visits before ordering equipment to measure peak import current on the main tails, check the consumer unit for available ways, and assess any existing solar installation. If the home already has solar panels, the installer reviews the existing system to determine the correct integration method for the Sigenergy battery.

For installations with whole-home backup, this survey stage is particularly important. Full backup means every circuit in the house continues to run when the grid fails, including high-demand loads such as an electric shower or oven. The installer calculates whether the battery's continuous output rating can sustain the expected peak load during a power cut, and whether any additional transfer switch or circuit arrangement is needed to implement backup correctly.

2. Determining the battery capacity and module count

Sigenergy uses a modular approach: battery units can be stacked to reach the required usable capacity. The installer sizes the system based on the household's daily electricity consumption, the solar array output (where present), and the backup duration required. A typical UK household wanting to cover overnight demand from a day's solar generation might need between 10 and 20 kWh of usable capacity, but the calculation depends on the specific property.

The physical footprint of the chosen configuration is also checked at this stage: the battery stack needs adequate floor space, minimum clearances around it for ventilation and access, and a load-bearing floor surface that can take the combined weight of the units.

3. Preparing and positioning the battery system

Sigenergy systems are typically floor-standing. The installer positions the unit on a level, solid floor surface with the manufacturer's required clearances, and routes the cable entry glands before placing the system in its final position. If the installation is in a garage, the floor is checked to confirm it is dry and the temperature range is within the battery's operating specification year-round.

4. Running and connecting the AC supply cable

A dedicated cable runs from the consumer unit to the Sigenergy inverter terminal block. The conductor size depends on the system's rated current and the cable route: longer routes or those through thermally insulating materials need a larger conductor to stay within the volt-drop limit at BS 7671 Regulation 525. The cable must follow safe zones or run in mechanical protection throughout. All connections inside the inverter terminal block are made to the torque values in the installation manual.

5. Fitting the MCB and any backup transfer arrangement

The supply circuit is protected by an MCB at the consumer unit, sized to match the cable and the system's maximum charge current. Where full home backup is included, the installer may need to install a changeover arrangement or dedicated sub-panel so that backed-up circuits are correctly separated from non-backed-up ones. This prevents backed-up circuits from feeding power back to the grid during a power cut, which would be unsafe for grid workers.

All terminals are torqued before the board cover is refitted. Polarity and earth continuity are checked on all new circuits before closing the board.

6. Installing the CT clamp and configuring energy management

A current transformer (CT) clamp fits around the grid import conductor at the consumer unit or meter. The clamp signal cable routes back to the Sigenergy inverter's meter input. Orientation matters: a reversed clamp produces inverted readings, causing the system to behave as though it is exporting when it is importing and vice versa. Once fitted and orientated correctly, the installer configures the energy management settings in the Sigenergy app to match the household's energy tariff and any solar arrangement.

7. Commissioning and notifying Part P and DNO

With all connections made and dead tests passed, the installer powers up the Sigenergy system and steps through the commissioning wizard. Charge and discharge schedules are set, backup mode is enabled and tested by simulating a grid failure, and a test cycle confirms correct operation in both normal and backup modes. The installer then notifies the installation through their Part P registered competent person scheme: you receive an Electrical Installation Certificate.

DNO notification follows standard rules. Systems exporting up to 3.68 kW per phase on a single-phase supply can be self-certified under G98, with the DNO notified within 28 days. Larger systems require G99 pre-approval before installation starts. Keep both the EIC and the DNO notification letter with your property documents.

When to call us

Richard installs home battery storage systems, including Sigenergy and other brands, across east Kent. He handles DNO notification, Part P certification and commissioning on the same day. Get in touch for a free fixed quote.