Licensed Tesla and Sonnen Battery Installers

  • Installation
  • Service
  • Maintenance

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

Simmark take care of everything from the Tesla system design, permits, system installation and maintenance. We also offer financing as well.

Simmark also offers German designed and manufactured sonnenBatterie, offering highest standards in safety and quality that “Made in Germany” stands for.

Why sonnen?

  • Global leader in solar storage systems – sonnen begun in 2010 and solely focuses on home energy storage!
  • Safe and longlasting – sonnen uses the best chemistry available for home energy storage – Lithium Ferro Phosphate.
  • Reduce your electricity bills to as low as $30/month with sonnenFlat.

Sonnen started in 2010 in Germany and is the global leader in solar storage systems with thousands of sonnen batteries installed around the globe! The sonnenBatterie is a complete system – ready for connection. This means that inside of every sonnenBatterie you’ll find extremely durable battery modules but also an inverter, an intelligent energy manager, measurement technology and the software to operate it all smoothly.

The sonnenBatterie is based on lithium ferro phosphate chemistry (LiFePO4), offering great longevity and safety.
sonnen’s vision: “Our goal is a world in which everyone is able to cover their energy needs with decentralised and clean energy source. Everyone can connect with each other to share energy where and when it’s needed. This will emancipate our world from the dependence on fossil fuels and anonymous energy corporations.” Christoph Ostermann, CEO sonnen GmbH

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)

Quick Quote


Simmark can install an energy meter to MONITOR household 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.