6kW 42kWh Single Phase ESS Kit

The 6kW 42kWh Single Phase ESS Kit combines the BW-INV-SPH6KA single-phase hybrid inverter with a 42.2kWh battery stack. The inverter manages solar generation, grid interaction and backup supply, while the battery stores surplus energy for evening use and grid outages. Everything is matched at the factory, so the inverter, battery management system and communication link are tested together before dispatch.

A 42kWh battery is the mid-capacity option in the Sinoah Energy stackable range. It is built from either three 14kWh modules or six 7kWh modules, which means capacity can be extended later by adding a module rather than replacing the stack. The enclosure is IP66 and the modules are floor-standing, so the system suits a garage, utility room or plant cupboard.

What the Kit Includes

Sizing: What 42kWh Covers

A UK home with average consumption uses roughly 8kWh to 12kWh a day, and more where a heat pump or EV is present. With 41.36kWh usable, this kit covers two to three days of normal demand without recharging, or one day of heavy demand with a heat pump running through the evening peak.

The 6kW inverter rating sets how fast the battery can be charged and how much load can be supplied at once. Households that only need to shift solar into the evening are usually well served by this pairing, while homes with an EV charger and a heat pump are normally moved up to the 8kW 56kWh kit for more throughput and headroom.

System Specifications

Stacking and Installation

The battery modules are floor-standing and stack vertically on a level base, with the inverter wall-mounted beside or above the stack. A 42kWh stack in 14kWh modules occupies a footprint of 690 x 240mm and stands 1495mm high, which fits a utility room or the corner of a garage. Clearance around the stack is needed for airflow and for the natural convection cooling to work.

Commissioning links the inverter and the battery over the CAN connection, after which the monitoring app reports state of charge, cycle count and per-module voltage. Sinoah Energy supplies the system as a matched kit from UK stock, so the inverter and the modules arrive together for a single installation visit.

Applications

The 6kW 42kWh Single Phase ESS Kit suits family homes shifting solar generation into the evening peak and covering overnight demand.

Properties on time-of-use tariffs using cheap overnight electricity to charge a large battery.

Homes that need multi-day backup for essential circuits during grid interruptions.

Why Choose Sinoah Energy

Sinoah Energy supplies matched energy storage kits from UK-held stock, so inverter and battery arrive as one system rather than as separate orders from different suppliers. The hardware is manufactured by NeoVolt with more than ten years of battery and inverter production experience, and support is handled from the UK.

Pre-sales support covers capacity calculation and compatibility checks, trade customers can ask for OEM or ODM customisation, and after-sales support includes remote diagnostics through the app and dealer training.

FAQ

Q: How long will the 6kW 42kWh Single Phase ESS Kit run a house?

A: With 41.36kWh usable it covers two to three days of average domestic demand without recharging, or roughly one heavy day with a heat pump.

Q: Can the capacity be increased later?

A: Yes. The stack is built from 14kWh or 7kWh modules, so modules can be added to reach 56kWh without replacing the existing units.

Q: Does the battery work in a cold garage?

A: Yes. The modules include self-heating for charging from -20C, so an unheated garage or outbuilding is suitable.

Q: Is the kit certified for UK connection?

A: The inverter carries G98 and G99 certification and the batteries carry IEC 62619 and UN38.3, with the certificate set supplied for the DNO notification.

Q: What space does the system need?

A: A 42kWh stack in 14kWh modules occupies 690 x 240mm of floor and stands 1495mm high, with airflow clearance around the stack and wall space for the inverter.

Q: What is the warranty on the kit?

A: 10 years on both the inverter and the battery modules, with UK-based service.