Net-billing (most of Canada):

1) The Photovoltaic Array

Solar photovoltaic modules are mounted on a roof or ground mount where they are nicely exposed to the sun. A proper site assessment with shading analysis can help determine the ideal location for the array.

2) Grid – tied Inverter

The grid-tied inverter converts the DC (Direct Current) electricity from the solar array to to AC (Alternating Current) electricity found in our homes or commercial buildings and the grid.

3) Buildings’ Electrical Panel

Where the power from the grid is split up between all of the different loads for the building. The inverter feeds electricity into the mains panel through a couple of breakers. This electricity goes wherever it is needed, be it in your building or your neighbours.

4) Bidirectional Meter

Usually supplied free of charge by the wires owner, the bidirectional meter keeps track of both the energy imported from the grid and the energy exported to the grid. In this way the building owner is billed for what they take from the grid and credited what they put in with the solar!

5) The Electrical Grid

Dual metered system (Ontario microFIT and FIT projects):

1) The Photovoltaic Array

2) Grid – tied Inverter

3) Export meter

This meter keeps track of the electricity (measured in kiloWatt-hours) exported to the electrical grid from the solar electric system. Your credit is based on the reading from this meter.

4) Electrical Grid

5) Import meter

This meter keeps track of the electricity (measured in kiloWatt-hours) imported from the electrical grid for the buildings’ loads.

6) Buildings’ Electrical Panel