Solar – PV Systems
When the sun shines on a solar module the solar cells generate DC electricity. A grid connected inverter converts the DC electricity produced by the solar cells into 240V AC electricity, which is then used in the household, with any excess fed back into the electricity grid. In the event that the electricity grid fails, the inverter will sense that the grid is no longer active and will shut down as a protection measure. Generally, the electricity fed back into the grid is recorded on a grid feed in meter. Your electricity authority will pay you a nominal amount for each kilowatt hour of electricity that your grid connected system feeds into the grid.
Stand Alone solar systems differ from grid connected systems in that the system is not connected to the grid. The solar modules are connected to a charge controller which charges a battery bank. The battery bank is then fed into an off grid inverter which converts the energy stored in the batteries into 240V AC. This is then used to power devices within the home.
As a variation on the above systems, the Grid connected system and off grid system can be integrated together. This allows you to use your solar during the day, excess energy is stored in the battery bank for nighttime use or when the grid fails. By utilising this type of approach you can benefit fully from your solar system and still have the grid for back up should you need it.
Let us engineer a solution for you. Contact us for details.