Solar electricity systems in urban buildings can be connected to the main electricity supply, called the grid. In such systems the electricity produced by solar modules is used directly in the building and any excess energy is fed into the grid. When the solar electric system does not produce enough electricity for the building's needs, power is drawn from the grid.

In a large building, such a solar electricity system can reduce the peak daytime power consumption from the grid, thus reducing electricity costs. Also, the active electricity-generating elements can replace standard construction materials, effectively reducing the investment needed in the solar electricity system.

When the system is in place, it begins to pay for itself right away by producing electricity. As the electricity is generated where it is consumed, transmission and distribution losses are avoided. Solar electricity is particularly advantageous in situations where the power is used for applications such as cooling and air conditioning, with peak loads during the day-time when the solar electricity production is at its highest.

Naps supplies complete grid-connected systems, either as standard packages for smaller systems such as residential houses, or as custom-designed systems for larger projects such as commercial and public buildings.

• Standard packages
• Custom-designed systems

Our grid-connected solar electricity systems consist of the following main components:

• Solar modules - fitted with quick connectors
• Mounting structure - to suit building location and degree of integration
• Module cables, string cables, dc box
• Inverter - to match array characteristics
• DC electrical hardware - main indoor cables, possibly a dc disconnect switch
• AC electrical hardware - connection between mains and inverter, protection devices, kWh meter, etc.
• It may also include monitoring, display, data logging devices.