If you’re building a new home, solar probably isn’t the first thing on your mind. You’re thinking about floorplans, colours, cabinetry, flooring, heating, cooling, driveways, landscaping; the list goes on.
But from my experience helping homeowners with solar installation in Ballarat, I can tell you this: the best time to think about solar is not after the house is finished. It’s much earlier.
When solar is planned properly during the build, you usually get a cleaner installation, better panel placement, easier wiring, and a system that suits the way your home will actually run. When it’s left until the end, we can still make it work, but sometimes the roof layout, switchboard, cable paths, or inverter location have already been decided in a way that makes things harder than they needed to be.
So, if you’re wondering when to plan solar for a new home, my honest answer is: as early as possible. Even if you don’t install the system until after handover, the planning should start while the home is still on paper.
Why Solar Should Be Part of the Build Conversation Early
A new build gives you a rare opportunity. Instead of trying to fit solar around an existing home, you can design the home with solar in mind from the start.
That means we can look at the roof orientation, available roof space, switchboard location, inverter position, cable pathways, and future options like batteries or EV charging before anything is locked in.
This matters because solar is not just a few panels slapped on the roof. A good system needs to work with your home, your energy use, your roof design, and your future plans.
In Ballarat, we get a real mix of homes. Some new builds have large, simple roof sections that are perfect for residential solar panels. Others have more complex rooflines, lots of hips and valleys, skylights, flues, vents, or air-conditioning units. None of those things are wrong, but if they take up the best roof space, they can limit how many panels we can install or how well the system performs.
That’s why I always say: before your roof is finalised, have a solar conversation.
The Best Time to Plan Solar for a New Home
The ideal time to start planning solar is during the design stage, before the final house plans are approved.
At this point, there’s still room to make smart decisions. We can look at whether the roof has enough usable space, whether north-facing sections can be kept clear, whether an east-west split might suit your usage, and whether anything on the roof could create shade or block panel placement.
If you’ve already passed the design stage, the next best time is before electrical rough-in. This is when the electrician is wiring the home, so it’s much easier to allow for solar cabling, inverter placement, switchboard space, monitoring, and future battery or EV charger options.
After that, solar can still be planned before roofing and final fit-off. We may still be able to coordinate with the builder and electrician, but there’s usually less flexibility.
And if the house is already finished? No drama. We install solar panels in Ballarat on existing homes all the time. But for a new build, the earlier we’re involved, the more options you usually have.
Solar Victoria also recommends that people building a home speak with their builder early so solar can be properly considered during the construction process. The Solar Victoria solar panel rebate is currently available for eligible homes under construction, as well as existing homes and rental properties.
What Should Be Planned Before Construction Starts?
The first thing I like to look at is the roof.
For solar, roof space is valuable real estate. Ideally, we want clear, unshaded sections that can fit enough panels to make the system worthwhile. North-facing roof space is often excellent, but east and west can also work really well, especially if you use power in the morning and late afternoon.
What we want to avoid is having the best solar section filled up with vents, skylights, chimneys, aerials, satellite dishes, or air-conditioning units. I’ve seen plenty of homes where solar could have been simpler if those items had been shifted slightly during the build.
The second thing is the inverter location. The inverter is the unit that converts the solar power from your panels into usable electricity for your home. It needs to be accessible, protected where possible, and positioned in a practical place. A garage wall, shaded external wall, or service area can work well, depending on the house.
The third thing is the switchboard. New homes are using more electricity than ever. Heating, cooling, induction cooking, heat pump hot water, EV chargers, batteries; it all adds up. If the switchboard is planned properly, it can make solar and future upgrades much smoother.
Think About Your Future Energy Use, Not Just Day One
One of the biggest traps with new-build solar is sizing the system based only on what you think you’ll use when you first move in.
But a new home is a long-term investment. Your energy use may change a lot over the next five to ten years.
You might add a battery. You might buy an electric vehicle. You might switch to induction cooking. You might install heat pump hot water. You might work from home more often. Your family might grow. Or you might simply want to rely less on the grid as energy prices continue to be a concern for many households.
This is especially important in Victoria, where new building rules are moving homes further towards electrification. The Victorian Government says that from January 2027, new homes and commercial buildings must be built all-electric, with some exclusions for industrial and agricultural buildings.
That shift makes solar even more important. If your new home is going to rely more heavily on electricity, it makes sense to generate as much of that electricity as you reasonably can from your own roof.
This doesn’t mean everyone needs the biggest system possible. It means the system should be designed properly. At Ballarat Solar Company, we look at how the home will be used, not just how many panels can fit.
Should You Install Solar During the Build or After Handover?
This is a question I get a fair bit.
In a perfect world, solar is planned early and installed at the most practical point in the build. Sometimes that’s during construction. Sometimes it’s shortly after handover. It depends on the builder, site access, timelines, approvals, rebate requirements, and how the project is being managed.
Installing during the build can be handy because the cabling can be cleaner, access may be easier, and we can coordinate with other trades. It can also mean the home is ready to start generating solar soon after you move in.
But some homeowners choose to wait until after handover, and that can be fine too. Builders may have rules about who can work on site. The homeowner may want the build completed first. Or the timing of finance, rebates, and approvals might make a post-handover install easier.
My advice is simple: even if you install after handover, plan before handover.
That means making sure the roof is solar-friendly, the switchboard has been considered, and there’s a practical path for cabling and inverter placement. Future you will be very glad you did.
What to Ask Your Builder About Solar
You don’t need to become a solar expert, but there are a few questions worth asking your builder early.
Ask whether the roof design leaves enough clear space for solar panels. Ask where vents, flues, skylights, and air-conditioning units will be placed. Ask whether the switchboard can allow for solar, battery storage, and an EV charger later. Ask where the inverter could go. Ask whether they’re happy to coordinate with your solar installer before rough-in.
That last point matters. A good result often comes from simple coordination. The builder, electrician, solar installer, and homeowner all need to be on the same page.
I’ve always found that a quick conversation early can prevent a lot of headaches later. It’s much easier to adjust a plan than to change a finished roof.
Rebates and Incentives for New Build Solar
There are a couple of incentives homeowners often ask us about.
The first is the Solar Victoria rebate. As mentioned earlier, eligible Victorian households may be able to receive up to $1,400 towards the cost of installing a solar panel system, and Solar Victoria states the rebate is available for homes under construction.
The second is the federal Small-scale Renewable Energy Scheme, which creates Small-scale Technology Certificates, or STCs, for eligible systems. In practical terms, many homeowners assign the right to create STCs to a registered agent in exchange for an upfront discount on the system cost.
Now, I always recommend checking the current rules before making decisions, because rebate amounts, eligibility, and timeframes can change. But the main point is this: timing matters. You don’t want to accidentally install too early, miss an approval step, or assume you’re eligible without checking the fine print.
A good solar installer should help you understand the process before you commit.
Choosing the Right Solar Installer for a New Build
Not every solar job is the same, and new builds need a bit of extra care.
You want someone who understands solar design, electrical work, builder coordination, roof layouts, switchboards, batteries, and local conditions. Local knowledge helps too. Ballarat weather, roof types, estates, energy usage patterns, and distributor requirements can all affect the final recommendation.
You should also make sure your installer is properly accredited and licensed. The Clean Energy Regulator says rooftop solar installers and designers must be accredited by Solar Accreditation Australia, and accredited installers must also hold an unrestricted electrical licence in the state or territory of installation. Government guidance also notes that accredited installers are trained so solar and battery systems meet relevant Australian standards and industry best practice.
This is not an area where I’d recommend chasing the cheapest quote without looking closely at the details. Cheap solar can become expensive if the design is poor, the products are low quality, the install is messy, or the after-sales support disappears.
For a new home, you want the system designed properly from the start.
Common Mistakes I’d Avoid
The biggest mistake is waiting until the home is finished before thinking about solar. Again, it can still be done, but you may have fewer choices.
Another mistake is letting other roof items take the best solar space. A vent or skylight moved slightly during design can sometimes make a big difference to the number of panels we can fit.
A third mistake is undersizing the system. If your new home is going to have electric heating and cooling, heat pump hot water, induction cooking, a battery, or an EV charger in future, it’s worth planning for that now.
Another one is forgetting about the switchboard. Solar is part of the wider electrical setup of your home. If the switchboard is cramped or poorly planned, future upgrades can be harder.
And finally, don’t treat solar as a last-minute add-on. Good solar should be part of the home’s energy plan.
My New Build Solar Planning Checklist
If you’re building in Ballarat or nearby, here’s what I’d suggest.
Before finalising your house plans, get someone to review the roof for solar. Keep good roof space clear where possible. Think about where the panels, inverter, battery, and EV charger might go.
Before electrical rough-in, confirm the inverter location, cable pathways, switchboard allowance, and monitoring setup. This is also a good time to think about future upgrades, even if you don’t install them straight away.
Before installation, check rebate eligibility, product approvals, grid connection requirements, and builder access. Make sure everyone knows who is doing what and when.
That small bit of planning can make the whole process smoother.
Final Thoughts
When it comes to solar for a new home, early planning is everything.
The best time to think about solar is during the design stage. The next best time is before electrical rough-in. And even if you decide to install after handover, it’s still worth planning the roof, switchboard, inverter location, and future energy needs before the home is finished.
At Ballarat Solar Company, we help homeowners design practical, reliable solar systems that suit the way they actually live. Whether you’re just starting your build, halfway through construction, or getting close to handover, we can review your plans and help you work out the best approach.
If you’re building a new home and want honest advice about residential solar panels, batteries, future EV charging, or solar installation in Ballarat, get in touch with us. We’ll help you plan it properly from the start, so your new home is ready for the future; not playing catch-up later.
