Solar & Batteries

Monitor, convert, upgrade and store

Southern Highlands, Illawarra & Shoalhaven Solar Systems

Simmark installs solar systems in homes and businesses across the Shoalhaven, Illawarra and Southern Highlands. Over the past ten years we have proven that we are a trusted, local designer and installer who will be there for service after the sale is made. Simmark utilises only the highest quality components like Winaico and SMA.

Simmark is a Tesla Powerwall Certified Installer, which means we offer another customized solar-plus-battery solution that enables you to access the free, abundant power of the sun and reduces your reliance on fossil fuels.

With Powerwall you can store solar energy generated during the day for use any time. During the day, the sun shines on your solar panels, charging your battery. At night, your home draws electricity from your battery, powering your home with clean, sustainable energy 24/7. Installing Powerwall with Simmark is easy. We take care of everything from system design, permitting, installation, financing, and maintenance.

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)

Solar Power for Your Business

The working day consumption profiles of most businesses make them ideal candidates for solar power. Simmark is experienced in designing and installing commercial solar projects, having completed hundreds of kilowatts of generation for organisations such as Hanlon Windows, South Coast Stairs, Wright’s Chainsaws, Shoalhaven City Turf Club and North Nowra Medical Practice to name a few. Take a look at some of these.

When evaluating solar power and batteries, one size does not fit all. Our approach is consultative and personalised, as we believe it must be for such an important investment decision. We also have bases in the Shoalhaven, Illawarra and the Southern Highlands. Whether you need Solar in Nowra, Solar in Wollongong or Solar in Mittagong, Simmark can help. Our unique approach involves a thorough consultation process, followed by installing or upgrading your solar system, as well as the installation of a  home battery to store excess solar power. Contact Us today to start the transition to sustainable energy.


Meet the Powerwall 2 – Installing Now


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.