Southern Highlands, Illawarra & Shoalhaven Air Conditioning, Solar & Batteries, Electrical & More

Simmark is the leading multi-service contractor in the Shoalhaven, Illawarra and the Southern Highlands. Our team of experienced & qualified local tradesmen provide a complete range of professional services. The different facets of our business include air conditioning, electrical, solar & batteries, data & communications, security installations and plumbing (Shoalhaven & Illawarra only).

We have been in business for over 22 years and believe our unique combination of expert workmanship and friendly service make our technicians the best in the local area. With bases in Wollongong, Nowra and Mittagong, we have a wide service area that covers all of the Shoalhaven as well as the Illawarra and Southern Highlands. Just some of the town we regularly visit include Bowral, Moss Vale, Berry, Ulladulla & Kangaroo Valley.

Tesla Powerwall Certified Installer


Over voltage affecting solar performance ?

Over voltage affecting solar performance ?

Over voltage affecting solar performance?        Have you ever noticed with your solar inverter, that despite there being plenty of sun, it may not be producing? It may be an over voltage problem which could be as a result of either one of the following things: 1....

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