The NEMA 4X definition, as established by the National Electrical Manufacturers Association, is a rating for an outdoor electrical enclosure that has the following protective qualities:

Includes a gasket designed to protect against liquid and solid ingress;

  Suitable for indoor or outdoor use;

  Resistant to corrosion;

  Protects against water ingress from rain, sleet and snow;

  Protects against solid ingress from airborne dust, debris, fibers, dirt and other foreign objects;

  Protects against damage from ice forming on the outside of the enclosure.

AC or DC coupling refers to the way that the solar panels are coupled or linked to the home's electricity system. DC (Direct Current)-coupled PV systems are generally more energy-efficient than AC (Alternating Current)-coupled systems, which translates into generating more power from the solar system.

Like all things, batteries have a finite lifespan. As batteries get older and efficiency decreases, they enter what researchers call “capacity fade”, which occurs when the amount of charge your battery could once hold begins to decrease with repeated use.

There are two common types of Lithium battery: LiFePO4 battery and ternary lithium battery. Compared with ternary battery, LiFePO4 batteries are characterized by high-safety, high-rate charge-discharge characteristics and long cycle life. 

Yes, the EP Cube is compatible to all existing PV systems.

The EP Cube is only compatible with EP Cube Battery module only, maximum 6 battery modules can be installed. Connection with battery modules from other brands is not supported.

Yes, the internet connection of the EP Cube is essential to allow monitoring with APP, to receive software automatic update and to maximize the accumulation of solar energy and make its consumption more efficient.

In self-consumption mode, the surplus power is charged to battery storage when solar generation power is bigger than household consumption, which usually happens during midday. And the battery storage is discharged to household appliances when the solar generation power is not enough. In TOU mode, the system adopts time-based control, providing best cost efficiency if your energy costs vary through the day. Backup mode reserve a portion of battery energy for backup at all time, providing additional security for your continuous power consumption.