Grid-Connected or Off-Grid

Power Your Life Simmark Energy Solutions  

Simmark will design an off-grid or grid-connected energy system to power your home or business. Our expert team of engineers and technicians will take care of everything from the system design, permits, system installation and maintenance. Simmark sells and installs numerous branded storage systems and will recommend the solution that is right for your circumstances. Contact your local Simmark office today for a free quote from your neighbourhood Simmark team.

  • Installation
  • Service
  • Maintenance

Simmark is a Certified Tesla Battery Powerwall Installer servicing the Illawarra, Shoalhaven, Goulburn and Southern Highlands. A Tesla battery Powerwall cuts out the need for fossil fuels as you can store solar energy which is generated during daylight hours. Through the use of your solar panels it charges your Tesla battery Powerwall so that at night you can power your home with sustainable energy 24 hours a day 7 days a week.

Tesla Powerwall consists of a 14 kWh lithium-ion battery pack, liquid thermal control system, an integrated inverter and software that intelligently dispatches electricity when it’s needed most. The unit mounts seamlessly on a wall or on the ground, indoors or outdoors, and is connected to the grid to export excess energy, maximizing your opportunity for economic benefit.

Powerwall can provide a number of benefits:
– Increasing self-consumption of solar power generation
– Powerwall can store surplus solar energy during daylight hours and use that energy later when the sun is not shining.
– Load shifting – Powerwall can charge during low rate periods when demand for electricity is lower and discharge during more expensive rate periods when electricity demand is higher.
– Back-up power – Assures power in the event of a grid outage.

Powerwall 2 specs:
– Mounting: Wall or Floor Mounted, Indoor/Outdoor
– Inverter: Fully integrated Tesla inverter
– Usable Capacity: 13.5 kWh
– Power: 5 kW continuous, 7 kW peak
– Round Trip Efficiency: 90%
– Operating Temperature Range: –20°C to 50°C (–4°F to 122°F)
– Warranty: 10 years
– Dimensions: 1150mm x 755mm x 155mm (45.3in x 29.7in x 6.1in)





In addition to grid-connected solar / battery systems, Simmark employs CEC accredited designers and installers for fully off-grid systems.

Although many of the advantages of an off-grid system can be achieved with a well-designed grid-connected system, sometimes, it doesn’t make sense to spend the money to establish a new electrical mains connection to the grid. This is usually the case in a new construction situation in a rural environment. However, off grid systems can also make sense for granny flats, sheds and other applications.

Contact Simmark to find out what kind of solar / battery system makes sense for you.

The BYD Battery-Box comes in 3 flexible versions, Battery-Box HV, Battery-Box Res and Battery-Box Pro. All versions are lithium battery units with a Battery Control Unit that allows for integration with an external inverter.

The battery boxes provide a combination of safety, lifetime, performance and expansion, making them ideal for all situations. Their modular design allows for more units to be added as needed.

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Simmark can install an energy meter to MONITOR household or business energy usage patterns over the course of the day and night.


Simmark can CONVERT your home to a net meter to allow solar consumption to be used first in your home, then exported to the grid.


Simmark can INSTALL a new solar system or UPGRADE an existing one to better fit your household consumption needs.


Once your system has been optimised, Simmark can install a home battery to STORE excess solar power generation for use in the evening.

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