Sustainable Earth Technologies


Renewable Energy





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[System Options]. . [Our Services]. . [Typical Pricing]. .

Cashback Offers

You could be generating your own electricity from sunlight in a way that's clean, efficient and emission-free. If you buy a new solar power system for installation in NSW, you may be eligible for a cashback rebate from the Australian Greenhouse Office (AGO) and the Sustainable Energy Development Authority (SEDA).

Tell me more about the Cashback Offers!


System Options

1. Grid-Interactive Solar System

Through the use of a Grid-Interactive inverter, solar panels supply power to household and, when excess power is being produced by the panels, they supply power to the electricity grid. When insufficient power is being produced, household power is supplied partially, or fully, from the power grid.



2. Stand Alone Solar System

A stand alone, or autonomous, power system provides for the power needs of the household without reliance on the electricity grid. This system requires a larger number of solar panels which can be accommodated on the roof space. Batteries are used to store the energy from the solar panels for use during times without sunlight. The building would need to incorporate a small room or shed on the building's South (cool) side to house the battery bank.



3. Stand Alone Hybrid System

A hybrid renewable energy power system utilises two or more energy production methods, usually solar panels and a small wind turbine.

The major advantage of wind energy is that when used together with solar panels, the reliability of the system is enhanced. Additionally, the size of battery storage can be reduced as there is less reliance on one method of power production. Often, when there is no sun, there is plenty of wind. Our customised software would be used to optimally size the hybrid power system.




Renewable Energy for Everyone

Grid-Interactive systems are particularly suited to residential applications because they do not require batteries to store the energy produced from the solar panels and are a cost efficient and trouble-free way of utilising solar energy.

With the grid-interactive power system, electricity is generated by the solar panels with the DC electricity from the panels passing through a grid-interactive inverter. The inverter converts the DC electricity into AC electricity which is then used by any loads operating in the house. If there is surplus electricity being generated by the panels, the inverter would feed the electricity into the main electricity grid. Conversely, when the panels aren't generating enough electricity to power the house, the grid would supply power to the house via the inverter.

Energy Australia and NorthPower are supportive of grid-interactive systems, and will pay for electricity generated in excess of the amount used during the billing period.

With the grid-interactive solar system, greenhouse gases are not produced. The house would be adding to "Green Power" generating capacity and actively supplying power for other users as well as providing power for much of its own use.



Solar Power Cashback Offers

A Government photovoltaic rebate is a available for solar power systems based on the number of solar panels installed. Each panel comes with a manufacturer's rating in watts, which indicates how much electricity it can produce. Rebates are calculated on a per-watt basis. As an example, the owner of a 1,000W (1kW) solar power system would be entitled to a rebate of between $2,400 and $4,000.

Link to Solar Rebate Information


How We Can Help You

Sustainable Earth Technologies can design, supply and install a renewable energy system to suit your requirements. Our experienced engineers and installers are suitably qualified to enable you take advantage of the Government Cashback Offers.


Services We Offer

The Renewable Energy section of Sustainable Earth Technologies can provide the following services:

  • Renewable Energy Systems - Design, Supply, Installation and Advice
  • Solar & Wind Equipment - Sales and Support
  • Solar Pumping - Design and Installation



Typical Pricing for a Grid Interactive System

The following links contain typical costs of common size grid interactive and stand-alone solar power systems and solar wind hybrid power systems. The systems are sized by the installed power and the maximum power they produce. The calculations use an average daily solar radiation figure for Newcastle and the Hunter Valley.

The installed size is the sum of the output of all the installed solar panels. This is the figure that the AGO and SEDA base their cashback calculations on.

The kWh per day figure accounts for inverter efficiency, solar panel temperature losses, battery charging efficiency and other system losses. This is the figure to look at when selecting a system size as this is the actual amount of power the system will feed into your house and/or electricity grid each day.

Link to Solar System Pricing

Link to Solar/Wind Hybrid System Pricing


Visit Online Solar Store


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Sustainable Earth Technologies Inc.
Newcastle NSW Australia
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