The short version
Key points
- The Australian single-phase EP Cube range provides 10 to 30 kWh of nominal storage, while the three-phase system ranges from 10 to 40 kWh.
- Single-phase systems can deliver up to 7.6 kW, while three-phase systems provide up to 12 kW in total, or 4 kW per phase.
- Three-phase backup requires a smart gateway and does not automatically mean every circuit in the home will operate during a blackout.
- The battery modules are rated IP67 when stacked, while the overall system is rated IP65.
- EP Cube says its current systems include a 10-year inverter warranty and battery coverage of more than 80% capacity for up to 10 years or 6,000 cycles.
What is the EP Cube?
EP Cube is a residential battery system developed and manufactured by Eternalplanet, described as an independent subsidiary of Canadian Solar. Launched in 2022, the brand has expanded into more than 10 markets across Europe, North America and Asia-Pacific.
The system combines the battery, inverter and energy management system. It is available in single-phase and three-phase versions, with a design intended to blend more easily into a home. EP Cube also promotes optional artwork for the system, including an Australian collaboration described in the supplied material.
Storage capacity and power output
The current Australian single-phase range runs from 10 to 30 kWh of nominal storage, using two to six battery modules. The single-phase system can provide up to 7.6 kW of power.
The three-phase system ranges from 10 to 40 kWh of nominal storage, using up to eight stacks. It provides up to 12 kW in total, or 4 kW per phase. Battery-only output depends on the number of modules installed and is distributed across the three phases.
Battery capacity should be matched to a household’s electricity use after sunset and the amount of surplus solar available to charge it. The supplied information also previews a single-phase 2.0 system, expected in the second quarter of 2027, with up to 40 kWh of storage, up to 10 kW of battery-only output on larger configurations and four solar trackers instead of two.
What happens during a blackout?
The single-phase EP Cube includes backup functionality and can provide up to 33 amps, with the inverter limited to 7.6 kW of continuous power. Three-phase backup also requires a smart gateway.
A three-phase battery does not automatically keep every circuit in a home operating during an outage. The circuits that remain powered depend on the system design, the inverter’s output and the loads connected to each phase. A home with a fridge, lights and television may be able to use whole-home backup, while larger loads such as air conditioning or floor heating may require selected backup circuits.
The installer should establish which appliances are priorities and explain exactly what will remain operational during a blackout. This is particularly important for three-phase homes, where the available output is divided between phases.
Weather protection, warranty and support
EP Cube says its battery modules are rated IP67 when stacked. This means the modules are dust tight and protected against temporary immersion. The overall system is rated IP65, so the IP67 rating should not be treated as applying to every part of the installation. The location, clearances and installation method still need to be suitable, particularly in areas that may flood.
EP Cube says the current systems include a 10-year inverter warranty. The battery warranty promises more than 80% capacity for up to 10 years or 6,000 cycles, with two years of coverage for accessories. EP Cube also describes an Australian after-sales, technical and sales team intended to provide local support.
App and energy management
The app is designed to show solar generation, household consumption and remaining battery energy. The system supports self-consumption, time-of-use and backup modes.
EP Cube also discusses Home Connect, which can schedule compatible appliances around solar production or electricity prices. The practical value of these features will depend on the compatible appliances, the household’s electricity plan and how the system is configured by the installer.
TechManPat’s conclusion
My main takeaway is that the battery size is only part of the decision. I would want a quote that clearly covers the solar system, usable storage, backup circuits, phase-by-phase output and Australian support. The right choice depends on whether the priority is using more solar, keeping selected loads operating during outages or preparing for future electricity needs.
This knowledge-centre summary is based on the linked TechManPat video and reflects the information available when it was published. Check current pricing, availability and policies before acting.
