Solar vs Mains Power for Automatic Gates in Western Sydney

Every automatic gate needs power, and in Western Sydney the choice between solar and mains comes up more often than in most parts of Sydney. New estate homes rarely have power at the front boundary, and rural-residential lots can have gates hundreds of metres from the house. Here is how the two options compare and how to choose.

How each option works

Mains-powered gates run from a power point or hard-wired supply near the gate. A transformer converts it to the low voltage most residential gate motors use. Many mains gates also have a backup battery that keeps them working during a blackout.

Solar gates run entirely from a battery. A solar panel, usually on the gate post, a pier or a nearby pole, recharges the battery during the day. There is no connection to the house at all.

Both can run the same remotes, keypads, intercoms and safety beams. From the driver's seat, a well-set-up solar gate works just like a mains one.

When mains makes more sense

• There is already a power point near the gate, or the switchboard is close to the boundary
• The gate is heavy, very wide or solid, and draws a lot of power each cycle
• The gate opens and closes many times a day
• You want accessories that draw a lot of power, such as gate lights or heated cameras
• The front yard is heavily shaded by trees or buildings

Running new mains power to a gate is electrical wiring work. In NSW it must be done by a licensed electrician, who should issue a Certificate of Compliance for Electrical Work when the job is done. The cost depends heavily on distance and what the cable has to go under or through.

When solar makes more sense

• The driveway and landscaping are already finished and you do not want to cut through them
• The gate is a long way from the house, typical of acreage around Llandilo, Kemps Creek, Bringelly, Cobbitty and the Penrith rural fringe
• The gate is light to moderate weight and is used a typical number of times a day
• The panel location gets good sun year round

Western Sydney gets plenty of sunshine, which helps. The bigger risks are shade, winter and heat.

The sizing mistakes that cause problems

Most solar gate complaints come from a system that was too small. A solar kit has to be sized for the worst conditions it will face, not the average.

Underestimating daily use. Count how often the gate really opens. School runs, a second car, visitors, deliveries and the teenager who forgot something all add up.

Forgetting standby power. Intercoms, keypads with backlights and GSM modules draw power all day and night, even when the gate is not moving. On a small battery, standby load can be more than the motor uses.

Ignoring winter shade. The sun is much lower in winter. A panel that gets full sun in December can be in the shadow of a two-storey house or tree by June. Check where the shadows fall in winter.

No reserve for cloudy weeks. A run of overcast days in winter is when an undersized system fails. The battery needs enough capacity to carry the gate through that.

Cooking the battery. Summer heat is hard on batteries. The Bureau of Meteorology recorded 48.9 degrees at Penrith Lakes on 4 January 2020, the hottest it has recorded in the Sydney basin. A battery in a sealed box in full sun ages faster. Shaded, ventilated housing helps it last. Our article on summer heat and gate motors covers this in more detail.

A middle option: mains with battery backup

If power is near the gate, a mains-charged backup battery gives you blackout protection without relying on the sun. This suits busy gates and properties prone to storm outages. Some installers also offer hybrid setups where a solar panel supplements mains charging.

Side by side

Questions to ask an installer

• How many cycles per day have you sized this for?
• Have you included the intercom, keypad and any GSM module in the calculation?
• How many days of reserve does the battery give in winter?
• Where will the panel go, and have you checked winter shade?
• How is the battery housed, and how often do you expect it to need replacing?

A good installer will answer these without hesitation. If they cannot, be cautious.

Getting the right setup

Tell us how far your gate is from the house, how often it is used, and whether the front yard gets full sun. We connect you with an independent local installer who works in your part of Western Sydney. You can read more about solar gate kits, or if you are in Camden or Oran Park, see automatic gates in Camden.