Solar Panel Installation in St Marys
St Marys is one of the oldest suburbs in the Penrith area, and it is changing quickly. The streets closest to the town centre still hold modest post-war cottages from the era when the local munitions factory and industrial estate drew workers to the district. Around them, new duplexes and townhouses are rising, and the Sydney Metro interchange at the station is set to bring thousands more homes over the coming decades. Solar National designs and installs solar panels, batteries and inverters for all of it, from a compact cottage roof to a brand-new build still at the frame stage.
We service St Marys from our Seven Hills warehouse, an easy run along the M4, so equipment is held close by and site visits fit around your schedule. Tell us a little about your home and your power bills and we will put together a no-obligation quote, designed after we have seen the roof in person.
What Our Clients Have To Say!
Residential Solar in St Marys
Many of the original St Marys homes are small weatherboard or brick cottages with limited roof space, so every panel has to earn its place. On these homes we focus on output per square metre, using high-efficiency modules and careful layout planning to fit a worthwhile system on a roof that other installers might write off as too small. A good residential solar design here is about precision rather than panel count.
If you are building a new home, knocking down and rebuilding, or developing a duplex in St Marys, talk to us before the roof goes on. Planning solar at the construction stage lets us specify cable routes, switchboard space and inverter locations early, which keeps the installation neat and avoids retrofitting costs later. For dual-occupancy projects, we can design a separate system for each dwelling so both are ready for sale or lease with solar already in place.
Commercial Solar in St Marys
St Marys has an industrial backbone that few suburbs can match. The Dunheved industrial area in the north of the suburb is home to manufacturers, fabricators, logistics operators and trade suppliers, many running machinery, compressors and cool rooms throughout the working day. Their large metal roofs are well suited to high-capacity systems, and daytime operating hours line up closely with peak solar generation.
Closer to the station, the Queen Street shopping strip and surrounding town centre host retailers, food businesses and professional services that will only grow as the Metro precinct develops. Our commercial solar team designs systems for both settings, from a modest array on a shopfront to a large three-phase installation on a factory roof. We model expected savings against your actual consumption, coordinate the Endeavour Energy approval, and schedule the work to keep your operations running.
Solar Panels in St Marys
A lot of older St Marys cottages have corrugated metal roofs, which are among the most straightforward surfaces to mount solar on. We fix rails directly to the roof structure with sealed fasteners designed for metal sheeting, so there are no tiles to lift and the job is typically completed quickly. For small roofs we lean towards premium high-efficiency modules such as Aiko and REC, which generate more power from the same footprint. Where roof space is generous, dependable options such as Trina and Jinko deliver excellent value. Every model in our solar panel range is tier 1 and backed by a 25 year warranty on both the product and its performance.
Inverters in St Marys
Compact cottage roofs often force panels onto two or three different faces, and each face receives sunlight at a different time of day. A basic inverter can struggle with that mix, so we choose models with multiple independent inputs, or add panel-level optimisers, allowing each section of the array to perform at its best without being held back by the others. Most homes here run on single-phase power, and we size the inverter to suit both your roof and Endeavour Energy’s export rules. Our inverter range includes Fronius, Sungrow, SolarEdge, GoodWe and SMA, each with online monitoring and a 10 year manufacturer warranty.
Solar Batteries in St Marys
Plenty of St Marys residents are out for most of the day, commuting by train from the station or working across Western Sydney. Without storage, the solar your roof produces while the house is empty simply flows back to the grid for a small feed-in credit. A battery captures that midday energy and holds it until you return home, ready for cooking, heating, cooling and entertainment in the evening, and it can supply backup power during an outage.
The right battery depends on how your household runs. The Tesla Powerwall 3 suits families who want whole-home backup in a single unit, while the Sigenergy SigenStor appeals to drivers planning an EV, thanks to its optional integrated charger. If you prefer everything from one manufacturer, a Sungrow battery or GoodWe ESA pairs neatly with the matching inverter. The BYD Battery-Box stacks in modules as your needs change, and for homes that already have panels, Neovolt and AlphaESS offer practical add-on options. Value-focused households can also consider Fox ESS, SAJ or ESY storage.
Some properties closer to South Creek sit within council flood-planning areas. On these sites we mount batteries and inverters at a suitable height and in a protected location. Compare every model in our battery range or speak with our team for a recommendation based on your usage.
Why choose Solar National
We are a 100% Australian owned business, and every system we install in St Marys is designed and fitted by Clean Energy Council accredited professionals. As a NETCC Approved Seller, we follow an independent consumer code covering fair contracts, clear pricing and after-sales support. You deal with one team from the first inspection through to switch-on, and your installation is protected by a 10 year workmanship warranty. See examples of our work in the project gallery, or ask about our payment plans if you would rather not pay the full amount upfront.
Solar Rebates St Marys
Batteries currently attract the largest federal saving. Under the Cheaper Home Batteries Program, eligible storage installed at a St Marys home or small business receives a discount linked to its usable capacity, and that discount reduces in steps over the life of the program. New solar panels are supported separately through small-scale technology certificates (STCs), which are deducted from the purchase price at the point of sale. You can also connect your battery to a virtual power plant for ongoing bill credits. For a deeper explanation, read our NSW solar rebates guide and our overview of recent battery program updates. We apply every discount you are eligible for directly to your quote.
Book your free St Marys site inspection today. Call 1300 179 949 or send us an enquiry.
We Select The Most Reliable & CEC Approved Products
Nearby suburbs we cover
Our installers work throughout eastern Penrith, including North St Marys, Colyton, Oxley Park, Claremont Meadows, Werrington and Erskine Park. Surrounding areas with their own pages include Penrith, Mount Druitt, Blacktown and Marsden Park. Find your suburb on our service areas page or explore our Sydney solar installation hub.
Our Accreditations
Frequently Asked Questions:
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Usually, yes. High-efficiency panels produce more power per square metre, and splitting the array across more than one roof face often makes room for a useful system. We measure the roof on site before confirming the size we can fit.
Ideally before the roof is installed. Early planning lets us allow for cable paths, switchboard capacity and inverter placement for each dwelling, which results in a cleaner installation and fewer costs later on.
Often it is. When the house is empty, most of your solar would otherwise be exported for a low credit. A battery stores that energy so you can use it in the evening, when you are home and grid power is at its most expensive.
It can. Some nearby properties fall within council flood-planning areas, so we check the site and position batteries and inverters at an appropriate height and in a protected spot where required.
Yes. We design commercial systems for factories, warehouses and workshops across Dunheved and North St Marys, sized to daytime machinery and equipment loads, and we manage the network approval process from start to finish.
St Marys is in the Penrith City Council area and is served by the Endeavour Energy network. A typical rooftop system on a house does not require development consent, and we submit the network connection paperwork for you.
