Solar panels

Right House is now offering grid-connected solar PV systems. 

How does solar PV work?

Solar Photovoltaic (PV) panels positioned on the roofs of homes and business generate clean electricity by converting sunlight to electricity.  The term ‘photovoltaic’ derives from the Greek word phos meaning light and the word volt, the unit for electrical voltage.  Photovoltaic panels contain a number of cells which are constructed from layers semi-conducting material, usually silicon.  When light shines on the cell it creates an electric field across the layers, causing electricity to flow. The greater the intensity of the light, the greater the flow of electricity is.

Solar PV is different to solar hot water systems which are also mounted on rooftops but use the heat from the sun to provide hot water for household uses. 

What is a Grid-Connected PV system?

A grid-connected PV system supplies solar electricity directly to households and businesses.  During daylight hours, the solar panels produce a DC current which then run through an inverter that converts the current into AC electricity which is suitable for electrical appliances and export to the main electricity grid.

Unlike traditional ‘off-grid’ solar PV systems, grid-connected PV systems require no batteries to store energy.  The electricity produced by the solar PV system is fed into the home’s switchboard where it is used to help meet household electricity demand (and offset purchased electricity).  If the system produces more electricity than the household is using then electricity is exported to the main electricity grid and the home owner usually receives a credit for that electricity.  While during peak periods and at night electricity is imported from the grid, as per normal.

Is my house suitable for Solar PV

In general, New Zealand receives good solar radiation.  While clear, sunny skies are ideal for Solar PV, you can still generate substantial amounts of solar power on overcast days. In fact, solar PV is more efficient when operating in cooler temperatures.  

Positioning the solar PV panels with a north aspect and at an angle close to that of the latitude is the most efficient orientation and will generally produce the most energy on an annual basis.  However, variations from the ideal do not necessarily mean that solar will not be viable.  In general a solar system can be located up to 45 degrees east or west of north without significant reductions in efficiency.  More important than the ideal orientation is the amount of shading or shadows that may be present once the solar system is installed.  The best solar sites will have minimal or no shading from trees, dormers, chimneys, hills, other buildings or other obstructions particular during the peak sun hours of 9:00am to 3:00pm annually.   Right House can carry out a site inspection to determine if your house is suitable for solar PV. For more detailed information about PV systems click here.

How much will it cost?

Because Right House is part of the Mark Group and able to leverage the economies of scale in the large Australian PV market, we will have some of the lowest grid-connected PV prices in New Zealand.  Prices change frequently as we continually seek competitive supplier arrangements and as the price of PV drops internationally. Contact us for an obligation free quote.