Solar panels and batteries in the Shoalhaven

Solar pays best when the power is used on site, because a kWh you use replaces one you would have bought, while a kWh you export earns only the feed-in rate. That single fact splits the bay into three. A household at Sanctuary Point that is home through the day uses a large share of what the roof makes. A holiday house at Vincentia that is full for six weeks exports most of the rest. A motel or café in Huskisson is busiest in summer, when generation peaks.

So we ask how the property is used before we talk about size. The estimates below show typical systems; your written quote confirms the number once we know whether the house is lived in, let out or locked up.

On a house that is empty most of the year, the first few kilowatts cover the base load: fridges, a pool pump, a heat pump or air-conditioning left on timers. Extra panels beyond that spend most of their life exporting at a low rate, so they take far longer to earn back. We model the size you asked about and a smaller one, and show both.

Two practical points matter more here than in town. Set up monitoring with alerts, because a fault in March is lost money by September if nobody is there to see it. And keep the internet on: flexible exports need an online inverter, and where a property lacks reliable internet the connection falls back to a low fixed limit.

A household that is home through the day is the best case rooftop solar has. Washing, dishwashing, hot water and reverse-cycle heating or cooling can all run while the panels are producing, without any new equipment. For many such homes a 6.6kW system covers the day comfortably.

That also makes the battery case weaker, not stronger. A battery stores what you cannot use at the time, and a household at home is already using most of it directly. Evening load and outage backup are still real reasons, but a battery is best treated as a separate decision once you have seen what the panels alone do to a couple of bills.

In Huskisson the busy season and the sunny season are the same season. Refrigeration, air-conditioning and hot water run hardest in summer, when the roof produces most, so little is exported. Winter is quieter and exports more, which pulls the annual average down. A sound business case uses twelve months of bills, not a January one.

Our standard commercial systems start at 30kW, which suits accommodation, clubs, caravan parks and workshops. A single small shopfront is often better served by a large residential-sized system, if the landlord agrees. On leased premises the roof belongs to the owner, so that conversation comes first.

Jervis Bay and St Georges Basin are sheltered water, which is gentler on hardware than an open surf beach, but salt still reaches roofs near the shore. Panels cope; rails, clamps and fasteners are where corrosion builds up. Ask any installer which grades they use for your exposure and how they keep different metals apart.

Bushland runs close to many streets around the bay, and whether your block is mapped as bush fire prone land is quick to check with the NSW RFS online tool. Rooftop solar on a house does not generally change the planning position. What gets thought about is the detail: sealed roof penetrations, how the array sits relative to gutters and valleys, and an isolation point a fire crew can find.