Canadian Solar unveils new EP Cube systems featuring higher power, scalable storage

From ESS News

Chinese-Canadian PV manufacturer Canadian Solar has presented two new versions of its EP Cube storage solution. The product range offers all-in-one residential energy storage solutions that integrate a hybrid bidirectional inverter with modular lithium iron phosphate (LFP) battery technology.

“The EP Cube Single-Phase 2.0 system provides 10 kW AC and 15 kW DC output in a more compact form factor,” a spokeperson from the company told ESS News. “Unlike typical market solutions that offer only two MPPTs, this system integrates four independent MPPTs, enabling greater design flexibility for complex roof configurations and improving energy harvest under shaded conditions.”

“As for the EP Cube Three-Phase Pro system, it increases AC output to 20 kW, making it suitable for larger residential applications as well as commercial and industrial (C&I) projects. Notably, the backup port is built directly into the inverter, removing the need for a separate smart gateway. The system also supports up to five units in parallel, reaching 100 kW AC output, 120 kW PV input, and 200 kWh of storage capacity, delivering scalable energy resilience for modern business needs.”

The EP Cube Single-Phase 2.0 system utilizes a modular design to enable flexible capacity stacking. Individual battery modules feature a nominal capacity of 5 kWh and weigh under 42 kg. It can scale up to 40 kWh using eight stacked battery units on a single base. For properties demanding higher capacities, installers can connect up to two full units in parallel, bringing total storage capacity up to 80 kWh.

The integrated hybrid inverter includes 4 maximum power point trackers (MPPTs). Each tracker allows an input current up to 18 A and a short-circuit current of 25 A, processing a maximum input voltage of 600 V DC. The system supports a maximum combined PV input power of up to 15 kW. The inverter achieves a maximum efficiency rating of 97.60% and a European efficiency of 97%. The system carries an outdoor-ready protection rating—IP65 for the inverter housing and IP67 when the battery modules are stacked together.

As for the Three-Phase Pro, system capacities begin at 10 kWh, using two modules, and can scale up to 40 kWh within a single stacked footprint utilizing eight modules. For higher-capacity demands, up to five units can be linked in parallel, unlocking an expansive total system storage capacity of up to 200 kWh.

To support larger commercial solar arrays, the Three-Phase Pro inverter accepts a maximum PV input power of 24 kW and features 4 MPPTs. Each tracker can accommodate high-power, modern PV modules with an operating current profile of up to 17 A and a short-circuit threshold of 24 A, operating across a wide DC voltage window up to 1,000 V.

On the grid side, the system provides a continuous three-phase output power of 20 kVA (at 400V AC), delivering up to 28.9A of continuous current per phase. For outdoor placements, the system carries an IP65 protection rating for the main inverter assembly and an IP67 rating for the tightly locked LFP battery stack.

For both products, Canadian Solar provides a comprehensive product warranty package, offering a 10-year warranty on the inverter unit and up to 15 years or 6,000 cycles on the LFP battery modules.