For a household using 24 kWh a day, about $755 a quarter at Victoria's 30c a unit, the calculator puts 10–13kW solar at $6,270 to $11,270 after rebates, and 10–13kW solar + ~15kWh battery at $9,640 to $20,640. This page also covers Darley and Maddingley.
I am an advisor, not an installer and not a lead broker. You pay nothing at any point.
See what my home should costA family commuting towards Melbourne on weekdays, using 24 kWh a day.
A ballpark for one example household, not a quote. The low end of each range is what a competitive installer charges; the high end is a poor quote for the same equipment. Prices are from the same calculator the free assessment uses, with Victorian rates and rebates, and sun hours are its figure for Victoria. Bacchus Marsh's postcode is in Zone 3 of the federal small-scale scheme, which carries a rating about 17% higher than Melbourne's Zone 4[1]. The panel discount on this page is priced for that zone; the sun hours are still the calculator's Victoria-wide figure.
Four real households, run through the same calculator this site uses for an individual report. Panels only, no battery, clean roof, someone home some of the time. Prices are after every rebate that applies in Victoria.
| Household uses | Their quarterly bill | System | After rebates | Saves a year | Pays for itself |
|---|---|---|---|---|---|
| 10 kWh | $373 | 5–6.6kW solar | $4,070 to $6,100 | $350–$530 | 9–10+ years |
| 15 kWh | $510 | 6.6kW solar | $4,850 to $6,850 | $500–$750 | 8–10 years |
| 22 kWh | $701 | 10–13kW solar | $6,600 to $11,600 | $760–$1,140 | 7–10+ years |
| 30 kWh | $919 | 10–13kW solar | $6,600 to $11,600 | $990–$1,480 | 6–9 years |
The bill column is what that household actually pays in Victoria at 30c a unit, which is why the same house has a different bill in every state. Savings depend on how much of the generation gets used on site rather than exported, and at 1c a unit for exports that is the number that decides the answer. A household out all day saves less than the figures above; one home most days saves more. Every figure is produced by the calculator, not written down, so it moves when the published rates move.
Bacchus Marsh sits in the valley between Melton and Ballarat, close enough to Melbourne that plenty of households commute and far enough out that the town has its own character: an older centre, newer estates in Darley and Maddingley, and acreage on the edges. It is on Powercor's network, and its postcode sits in the federal scheme's Zone 3, which changes the panel discount a little.
Your retailer sells you the power. Your distributor owns the poles and wires, and it is the distributor that decides how much solar you may send back to the grid. Bacchus Marsh is inside Powercor's distribution area[2], so Powercor's rules are the ones a quote here should be designed to. Look for Powercor Australia on your bill, near the meter details.
The export limit is changing. Powercor's connection policy for 2026 to 2031, approved by the Australian Energy Regulator in April 2026, says it will lower the maximum static export limit to 1.5kW per phase during that period, and that rather than give anyone a zero limit it will offer flexible exports instead: up to 10kW per phase, varying with what the local network can take[3]. From 1 July 2026 flexible exports were first offered to customers whose pre-approval came back at 0kW. They need an inverter that supports CSIP-AUS and a reliable internet connection, and in Powercor's trial participants exported freely more than 90% of the time[4][5].
What that means in practice: the limit is set for your address at pre-approval, and your installer lodges that through Powercor's eConnect portal. Ask to see it before you sign. Power the house uses, or a battery stores for the evening, is worth the full import price. Power that runs into the export limit is simply lost, and even what gets out earns about 1c a unit. So size the array to what the house uses, not to the size of the roof.
The 2021 Census counts the Bacchus Marsh locality, which is the older part of town, at 7,808 people. 84.2% of its occupied homes were separate houses, and 22% of residents were 65 or older, against 16.8% across Victoria. Much of the newer estate housing around the town sits in Darley and Maddingley, which the census counts separately.[6]
So a Bacchus Marsh quote can be for anything from an older brick veneer in town to a recent four-bedroom house on an estate. Those are different jobs, and the area figures describe neither house in particular.
Things worth knowing before an installer walks the roof:
All of that describes the area, not your house. Two homes on the same street can be completely different jobs. Put your address in and the assessment works off the actual property rather than a town average.
On a bigger block the best place for panels is often not the house. A shed facing north, or a ground-mounted frame in open ground, can take a larger array with no shading from the house itself. The catch is the distance back to the switchboard: a long run needs heavier cable to keep voltage drop in check, and a ground mount needs footings and a frame. Both are legitimate costs, and both should be itemised.
If you are on acreage, find out whether the property is single-phase or three-phase before you get quotes. Powercor sets its export limits per phase, so the answer changes how much of a big array can actually be exported[3].
These are examples, not an average for Bacchus Marsh. They are picked to show how the answer moves for the kinds of household the census shows are common here. Clean roof, no shading, Victorian rates and rebates, and the battery prices assume it is installed before the federal battery discount steps down on 1 January 2027.
| Option | System | After rebates | Saves a year | Pays for itself |
|---|---|---|---|---|
| Change plan and cut waste first | No system | $0 | $150–$450 | Nothing to pay back |
| Solar panels only | 10–13kW solar | $6,270 to $11,270 | $630–$950 | 8–10+ years |
| Solar plus a 10kWh battery | 10–13kW solar + 10kWh battery | $7,400 to $18,000 | $1,310–$1,940 | 5–10+ years |
| Solar plus a 15kWh batteryPays back fastest | 10–13kW solar + ~15kWh battery | $9,640 to $20,640 | $1,650–$2,290 | 5–10 years |
Solar plus a 15kWh battery. It pays back fastest of the options open to you, which is the only measure here that accounts for what the thing actually costs.
Before any of it: get onto a competitive retail offer. It costs nothing, it takes an afternoon, and on a bill your size it is worth roughly $150 to $450 a year. Every payback below gets shorter once you are paying less per kWh, so it is worth doing first either way.
| Option | System | After rebates | Saves a year | Pays for itself |
|---|---|---|---|---|
| Change plan and cut waste first | No system | $0 | $100–$290 | Nothing to pay back |
| Solar panels onlyPays back fastest | 6.6kW solar | $4,560 to $6,560 | $600–$910 | 6–9 years |
| Solar plus a 10kWh battery | 6.6kW solar + 10kWh battery | $6,140 to $14,040 | $1,130–$1,450 | 5–10 years |
Solar panels only. It pays back fastest of the options open to you, which is the only measure here that accounts for what the thing actually costs. Solar plus a 10kWh battery takes more off the bill, about $571 a year more, for more capital up front. If keeping the lights on through an outage matters to you, that is the trade you are actually being offered, and it is a reasonable one.
Before any of it: get onto a competitive retail offer. It costs nothing, it takes an afternoon, and on a bill your size it is worth roughly $100 to $290 a year. Every payback below gets shorter once you are paying less per kWh, so it is worth doing first either way.
"Pays for itself" is the range between a competitive quote and a poor one for the same equipment, and 10+ means not inside ten years. The battery ranges are wide for the same reason. Your own usage, roof and timing will move every figure here, which is what the free assessment works from.
Applied by the installer as a discount on the quote, not something you claim. It scales with system size: on the 10–13kW solar in the first example above the calculator counts $2,330. It falls a little each year until the scheme ends in 2030. One local difference: this postcode is in Zone 3, where the same system earns about 17% more STCs than in Melbourne[1], and the figure above already counts it.
Up to $1,400, or half the cost after the STC discount if that is less, plus a matching interest-free loan you choose when you apply. Household taxable income under $150,000, property under $3 million, and no solar installed at the address in the last ten years. Owner-occupiers, owners of homes under construction and rental properties can all apply. Rebates are released in batches, so check what is left in the current release before you count on it. From 1 July 2027 household solar support moves into the Victorian Energy Upgrades program[7][8].
Victoria's own battery support has closed, so the federal Cheaper Home Batteries Program is the one that applies[9]. On a 10kWh battery the calculator counts $2,520. The rate is set by the date the battery is installed, not when you order it, and it steps down on 1 January 2027 and every six months after that[10]. Larger batteries earn less per extra kWh: the full rate applies to the first 14kWh.
There has been no minimum feed-in tariff in Victoria since 1 July 2025. Retailers set their own, and it cannot go below zero[11]. The calculator assumes 1c a unit, which is why every example on this page is decided by how much power the house uses itself.
The full breakdown, with dates, is in Victorian solar rebates explained.
Already holding a quote? This is how I read one, line by line.
For the first example household on this page, 24 kWh a day, the calculator puts 10–13kW solar at $6,270 to $11,270 after Victorian rebates, and 10–13kW solar + ~15kWh battery at $9,640 to $20,640. The range is the gap between a competitive installer and a poor quote for the same equipment. Your own figure depends on your usage and roof, which is what the free assessment works out.
Powercor. It sits inside Powercor's distribution area, so Powercor sets the export limit for your address at pre-approval, not your retailer. Powercor's 2026 to 2031 connection policy lowers the maximum static limit to 1.5kW per phase and offers flexible exports of up to 10kW per phase instead. Ask your installer for the approved limit before you sign.
Yes. Under the federal small-scale scheme the 3340 postcode is in Zone 3, while Melbourne's CBD postcodes are in Zone 4. Zone 3 carries a rating about 17% higher, so the same system earns about 17% more STCs here, which comes off the quote. The prices on this page already include that larger discount.
Usually, per kW, because of the frame, the footings and the trench back to the switchboard. What it buys you is a free choice of direction and tilt with nothing shading it, which on an acreage block can be worth the extra. Ask for those items to be priced separately so you can compare them against a roof or shed install.
The installer, and only when a job completes. Never the homeowner. No installer can buy placement, and nothing about you reaches one until you ask me to make the introduction.
About a minute. You get the system size, what it should cost, and what it saves. No one calls you unless you ask.
Start My Free CheckIndependent explainers on the parts of this that actually change the answer.
Prices, savings and paybacks come from this site's calculator, using Victorian rates verified 2026-08. Everything else is from the sources below, read on the date shown. Rules and rebates change, so check the source before you rely on one.