Solar Panels in Melbourne: East, West or North-Facing — Which Roof Is Best?

These aren't rigid rules. Roof pitch, shading, available roof area, panel layout, inverter design and your electricity usage can completely change the best answer for an individual property.

Australia is in the Southern Hemisphere. That means the sun generally travels across the northern part of the sky. As a result, a north-facing solar panel can receive strong sunlight over a large portion of the day.

Solar Victoria describes a north-facing roof or ground area without significant shading as the ideal starting point for maximising solar generation.

Imagine two Melbourne homes.

The classic Melbourne solar orientation.

If your main objective is "Generate as much solar electricity as reasonably possible over the year," north is usually the starting point.

What happens when your roof faces east?

The sun rises in the east. So an east-facing solar array starts producing useful electricity earlier in the day. That can be valuable if your household has significant morning consumption.

Think: 6am → 9am — breakfast, lighting, heating, hot water, appliances, school preparation, home-office equipment.

An east-facing array can shift some of your solar generation toward those earlier hours. Solar Victoria recognises east-facing roofs as a viable solar option, while noting that moving away from north can reduce overall generation.

West can be surprisingly useful in Melbourne.

West-facing panels receive more sunlight later in the day. That can be valuable because household electricity consumption often increases during the afternoon and evening.

Think: 3pm → 7pm — children return home, heating or cooling increases, cooking begins, TVs and computers turn on, household activity increases, EV may arrive home and begin charging.

Solar Victoria specifically notes that west and north-west arrays can generate more in the late afternoon and early evening, which can improve self-consumption for some households.

Not universally.

If you're measuring total annual generation, north generally wins. Solar Victoria states that east or west-facing panels on a 20° roof pitch can produce up to around 15% less average daily generation than a comparable north-facing arrangement.

But that doesn't automatically mean North = more savings.

You don't always have to choose between North OR East OR West. Your roof may provide a very useful compromise.

An east-west split means some panels face east and others face west. Instead of producing a stronger midday peak, the system can create a broader generation curve across the day.

SolarQuotes' current Australian guidance estimates east and west-facing panels at around 15% less annual generation than north-facing panels in comparable conditions, while highlighting the advantage of spreading generation across the day. That trade-off can be worthwhile for a household focused on self-consumption.

Here's the easier way to think about it.

This is a planning guide, not a system recommendation.

Melbourne isn't famous for perfectly sunny weather every day. And that's okay. Solar panels don't stop working because the sky isn't perfectly blue. They continue generating under diffuse light, although output can be considerably lower than on a clear day.

Solar Victoria states that actual solar generation depends on factors including sunlight hours, clouds, temperature, shading and panel orientation. The Bureau of Meteorology's Melbourne climate data also shows substantial seasonal variation in sunshine and solar exposure, with winter receiving much less solar energy than summer.

This is one of the most important points in this entire article. A perfectly north-facing roof with significant shading may be worse than an east- or west-facing roof with clear sunlight.

Solar Victoria recommends designing the system to minimise shading impacts and specifically advises homeowners to assess shading across the year.

And don't only check at midday. A roof can be unshaded at 12pm but heavily shaded at 8am or 4pm. That matters particularly for east- and west-facing arrays.

Direction isn't the only variable. Your roof also has an angle. Solar Victoria says slight variations in panel angle generally don't make a major difference to annual production unless the roof is particularly steep or flat. It also recommends a panel tilt of at least 10° so rain can help keep panels clean.

For many Melbourne homes, mounting panels at the existing roof angle is perfectly practical. There isn't always a reason to install complicated tilt structures simply to chase a theoretical maximum. The additional installation cost may outweigh the extra generation.

Don't panic. A south-facing roof is not automatically a reason to abandon solar.

The important question is: How much suitable roof area do you have on every available face?

You might have north roof, north-east roof, west roof, garage roof, or extension roof. A professional design can use multiple roof faces where appropriate. Modern inverter systems can also be designed with multiple independent solar inputs, while microinverters or optimisers can be useful in particular shading or multi-orientation situations. Solar Victoria specifically discusses these approaches for arrays facing different directions.

This is a common mistake. Imagine your roof has:

• North: 8 panels
• East: 12 panels
• West: 12 panels

A good system designer should not simply say: "North is best, so we'll use the 8 north panels and ignore the rest." They should ask:

• How much electricity does the household use?
• When is it used?
• How much roof area is available?
• Would additional east/west panels improve self-consumption?
• Is a larger system appropriate?
• What are the network export conditions?
• Is a battery planned?

This is probably the most important part of the article. Solar panels generate electricity. Your household consumes electricity. The value comes from matching the two.

A battery changes the orientation question again.

Without a battery: Solar at midday → Home → surplus exported
With a battery: Solar at midday → Home → Battery → evening home use

That means a north-facing system's strong midday generation can be stored for later. But batteries aren't free. The financial decision should consider battery purchase price, usable capacity, efficiency, degradation, electricity prices, feed-in tariff, solar exports, and household evening demand.

This matters when deciding between north, east and west. If your electricity plan pays a low feed-in tariff, exporting large amounts of midday solar may not be particularly valuable. A system that produces more solar when you are using electricity can therefore become more attractive.

Victoria's current electricity market no longer has a single ESC-set minimum feed-in tariff; retailers set their own offers. That makes understanding your actual electricity plan even more important.

Melbourne homes are connected through different electricity distribution networks. Depending on your suburb, your distributor may be CitiPower, Jemena, United Energy, Powercor, or AusNet.

Your electricity retailer is the company you generally receive your bill from. Your distributor manages the local electricity network and connection requirements. This matters because your solar system may have an approved export limit.

If you're genuinely curious about which part of your roof gets the most sunlight, don't rely only on Google Maps or standing in the backyard with a compass.

Solar Victoria recommends SunSPOT, a free solar assessment tool developed by the University of New South Wales and the Australian PV Institute and supported by Commonwealth and state governments. It uses 3D mapping, roof slope and shading information to estimate sunlight across roof areas.

Before getting quotes, look at your home from outside. Ask:

• Morning: Which roof gets direct sunlight first? East / North-East
• Midday: Which roof gets the strongest exposure? North
• Afternoon: Which roof stays in sunlight longest? West / North-West

Then ask: Where are the trees? Where are neighbouring buildings? Where are chimneys? Where are vents? Where are skylights? Where could future shading occur?

Solar panels are expected to remain on your roof for decades. So before installing them, ask: Is the roof itself in good condition?

Solar Victoria advises homeowners to ensure their roof is suitable for solar and recommends an onsite assessment. Older homes may also require switchboard work to meet current safety requirements.

Here's the simplest way to think about it.

If you have a clear, unshaded north-facing roof in Melbourne, north is usually the safest starting point for maximising annual solar generation.

But don't stop there. If your household uses most of its electricity:

• in the morning → look at east.
• in the afternoon → look at west.
• throughout the day → north may work very well.
• in both morning and afternoon → consider east-west.

And if your roof has shading, multiple faces or limited space, the answer may be a combination. The best solar roof isn't simply the one that faces north.

At Samsun Energy, the starting point should be the property, not a pre-selected package. The current residential solar service describes site assessment around roof condition, orientation and shading, followed by customised roof design and system selection.

Samsun's current residential installation portfolio includes a range of Melbourne-area projects rather than one standard system design. For example:

Before choosing, answer these six questions:

1. Which roof gets the least shade? This can be more important than compass direction.
2. When are you home? Morning? Daytime? Afternoon? Evening?
3. When do you use the most electricity? Look at your electricity bills if your retailer provides interval data.
4. Do you have flexible loads? Such as EV charging, heat-pump hot water, pool pump, dishwasher, washing machine.
5. Are you considering a battery? If yes, your solar and battery should be designed together.
6. What is your network export limit? Find this out before assuming all surplus solar can be exported.

A compass direction alone cannot tell you:

• Your annual solar generation
• Your exact savings
• Your payback period
• How many panels fit
• Your shading losses
• Your export limit
• Whether you need a battery
• Your ideal system size

For authoritative information on solar orientation and Melbourne solar, reference:

• Solar Victoria — Planning Your Solar Electricity System
• SunSPOT — Solar Assessment Tool
• Solar Victoria — Getting Ready for Solar
• Bureau of Meteorology — Melbourne climate data
• CitiPower / Powercor — Flexible Exports
• CHOICE — Solar system sizing and orientation
• SolarQuotes — Australian solar orientation guidance