A 5kW solar system in Melbourne generates around 18 kWh of electricity a day on average, or roughly 6,500 kWh a year. That is enough to cover most of the daytime usage of a couple, a small family or a home office, and it is a cost effective first step into solar.
Silicon Solar designs and installs 5kW systems (sometimes called 5kVA systems) across Melbourne and regional Victoria using Tier 1 panels, quality inverters and accredited installers. Every system is sized from your actual power bills, not guesswork.
5kW Solar System at a Glance
| Specification | 5kW Solar System |
|---|---|
| Panels | Around 11 to 12 panels at 440W to 475W each |
| Inverter | 5kW single phase string inverter (hybrid ready options available) |
| Roof space needed | About 23 to 25 square metres of unshaded roof |
| Average daily output in Melbourne | About 18 kWh |
| Estimated yearly output | About 6,500 kWh |
| Best suited to | Couples, small families, low to moderate daytime use |
| Warranties | 25 year panel product, 10 year inverter, 10 year workmanship |
Output figures are estimates based on Melbourne’s average solar exposure of roughly 3.6 kWh per kW of panels per day. Real generation depends on roof direction, tilt, shading and season, and is typically about half the average in mid-winter.
Tier 1 Solar Panels
11 to 12 x 440W to 475W Solar Panels
- Tier 1 solar modules from recognised manufacturers
- 440W to 475W high efficiency panels
- All panels on the Clean Energy Council approved list
- 25 year product warranty
- Local Australian warranty support
5kW Solar Inverter
1 x 5kW Inverter
- High efficiency string inverter
- Proven brands such as Fronius, GoodWe and Sungrow
- 10 year inverter warranty
- Wi-Fi app monitoring of generation and usage
- Hybrid inverter option if you want a battery later
Roof Mounting and Racking
Panel Mounting Kit
- Racking for tin, tile and Klip-Lok roofs
- Anodised aluminium, corrosion resistant
- Engineered for Australian wind loads
- Lightweight, low profile finish
- Tilt frames available for flat roofs
Professional Solar Installation
Installation by Silicon Solar
- Solar Accreditation Australia (SAA) accredited, licensed electricians
- 10 year workmanship warranty
- Grid connection and meter paperwork handled for you
- Certificate of Electrical Safety (CES) provided
- System handover and app setup on the day
Who Is a 5kW Solar System Best For?
A 5kW system is the right size when your household uses a moderate amount of power during the day and your roof space is limited. It typically suits:
- Couples and small families of two to three people
- Homes with gas heating or hot water, where electricity use is lower
- Townhouses and smaller roofs that cannot fit a larger array
- Households on a budget who still want to cut bills quickly
If you run ducted air conditioning, a pool pump or an electric vehicle, a 6.6kW system or 10kW system will usually give you better value per panel.
How Much Can a 5kW Solar System Save?
Your savings come from two places: every kilowatt hour you use directly from your panels is power you no longer buy from the grid, and any surplus you export earns a feed-in credit. Because buying power costs far more than the feed-in tariff pays, the biggest savings come from using your solar while the sun is up.
- Run the dishwasher, washing machine and dryer between 10am and 3pm
- Use timers on pool pumps and hot water systems
- Pre-cool or pre-heat the house on sunny afternoons
- Add a battery later to store surplus for the evening peak
We give you an estimate of payback during your free assessment, based on your real bills and tariff.
How Your 5kW Solar System Installation Works
- Free consultation and site assessment. We review your power bills, roof space, shading and switchboard.
- System design and fixed quote. You get a clear, itemised quote with the exact panel, inverter and racking brands.
- Approvals and paperwork. We lodge the network application with your distributor and apply any eligible rebates and STC discounts.
- Installation. Our accredited team completes the installation, with most homes taking around one day.
- Inspection, meter and handover. We arrange the Certificate of Electrical Safety and meter reconfiguration, then show you how to monitor your system.
Rebates for a 5kW Solar System in Victoria
Most Victorian homes can reduce the upfront cost through the federal Small-scale Technology Certificate (STC) discount, which we take off your quote, and you may also qualify for Solar Victoria programs. See our Victoria solar rebate guide and, if you are adding storage, the Cheaper Home Batteries Program. We confirm your eligibility during the free assessment.
Why Choose Silicon Solar for Your 5kW Solar System
Silicon Solar has been installing solar across Victoria since 2015. We are a CEC Approved Solar Retailer, a Solar Victoria Authorised Retailer and NETCC approved, with more than 4,000 customers served and a 4.9 star Google rating.
- Systems designed around your bills, roof and budget
- Only Clean Energy Council approved panels and inverters
- Accredited installers and one point of contact from quote to handover
- We manage approvals, rebates, CES and meter changes
- Local Victorian support after installation
Compare other options: 6.6kW solar system, 10kW solar system and hybrid solar and battery systems.
Frequently Asked Questions
On average a 5kW system in Melbourne produces about 18 kWh per day, or around 6,500 kWh per year. Output is higher in summer and lower in winter, and depends on roof direction and shading.
Most 5kW systems use around 11 to 12 panels when using modern 440W to 475W modules. You will need roughly 23 to 25 square metres of unshaded roof.
It suits couples and small families with moderate daytime use. If you have ducted air conditioning, a pool or an electric vehicle, a 6.6kW or 10kW system is usually better value.
In everyday solar sales the terms are used for the same size of system. kW measures real power and kVA measures apparent power; for a home solar inverter they are effectively the same rating.
Yes. If you choose a hybrid inverter now, adding a battery later is simple. With a standard inverter, an AC coupled battery can still be added.
Panels carry a 25 year product warranty, the inverter carries a 10 year warranty and our installation workmanship is covered for 10 years.