Farm and shed solar around Maffra and Sale

Farm solar in Wellington Shire is usually a bigger and more varied job than a house roof in Sale. A dairy shed with daytime milking, refrigeration and hot water loads can use a lot of what a large array produces, but the size you can connect depends on whether the property has three-phase supply or a single wire earth return (SWER) line. Ask for a site visit, bring a year of power bills for each meter, and expect anything larger than a standard home system to need a paid assessment by AusNet Services.

Sale Solar passes farm and shed enquiries to independent providers who do rural solar work. They inspect the site and quote; the referral site has no part in the installation.

Why do farms around Maffra and Stratford look at solar?

Maffra relies mainly on dairy farming and other agriculture, according to its Wikipedia entry, and Stratford’s main industries are dairying, sheep, cattle, horse breeding and vegetable crops. Around Heyfield the local economy rests on agriculture and timber, according to its Wikipedia entry. Dairies run milking machines, vat cooling and hot water at fixed times every day, and irrigation pumps run hard through summer, when panels produce most. That match between daytime load and daytime generation is what makes farm solar worth costing.

Shed roofs are often large, low-pitched and unshaded, which suits a big array. The catch is that the roof, the wiring back to the meter and the network connection all need checking before a size is agreed.

How big can a farm system be?

For solar installed from 1 October 2026, the federal Small-scale Renewable Energy Scheme covers PV systems up to 1 MW, up from 100 kW, according to the Clean Energy Regulator. Designers and installers must be accredited by Solar Accreditation Australia, and installers also need an unrestricted electrical licence. For mid-scale systems between 100 kW and 1 MW, the regulator does not require an accredited designer, though the installer still must be accredited.

What you can physically connect is set by AusNet. Under its standard process for systems up to 30 kW:

Supply to the property	Combined solar and battery inverters pre-approved	Most that can be sent to the grid
Three-phase supply	30 kW, shared over the three phases	15 kW in total
One phase in town or on the farm	10 kW on that phase	5 kW
Rural single wire earth return	10 kW on that line	3.5 kW

Those figures come from AusNet’s up to 30 kW connection page, which counts solar and battery inverters together. Anything above the automatic pre-approval, or above 10 kW on a phase, has to go through AusNet’s manual technical assessment, and you pay for it. The full approval and switch-on sequence is on the AusNet approval guide for Sale.

What about SWER lines?

Some rural properties are fed by a SWER line, a single high-voltage wire that uses the earth as the return path. AusNet’s standard process lets a SWER site export up to 3.5 kW, lower than a single-phase town connection. That does not stop you installing more panels to use on site, but surplus above the limit will be curtailed. A provider should tell you early if your property is on SWER, because it shapes whether a battery is worth adding to soak up the excess.

Options for farm buildings compared

Setup	Best for	Watch for
Array on the dairy shed roof, feeding the shed meter	Milking, vat cooling, hot water	Roof condition, cable run to the main board, three-phase availability
Ground-mounted array near a pump	Irrigation or stock water pumping	Fencing from stock, flood levels, trenching cost
Array on the house with a separate shed meter	Farmhouse loads only	Shed loads stay on the grid unless both are on one meter
Off-grid system for a remote dwelling	A lived-in house far from the grid	Battery size, generator backup, maintenance access
Battery added to a farm system	Evening milking, soaking up curtailed solar	Battery location away from fuel, chemicals and hay

Can a farm battery get the federal discount?

The battery discount runs through the Clean Energy Regulator’s certificate scheme. The regulator says an off-grid battery installed on a dwelling that is lived in, such as a remote farmhouse, can be eligible. Its battery page also says structures that are not lived in, such as sheds or bore pumps, are not eligible as off-grid sites. A grid-connected battery on a farm still has to meet the usual rules, and the details of sizing and discounts are on the home battery installation page.

For a large farm battery, a 30 kWh usable system averages $22,489 to $23,089 per system nationally, installed and after the federal discount. Commercial-scale storage is priced differently and should be quoted from a site visit.

What does a farm solar system cost?

A 10 kW system on a home roof averages $8,920 to $10,410 per system fully installed in Melbourne, and that is a reasonable starting point for a small shed array. Farm jobs move away from it quickly: long cable runs, trenching, ground mounts, three-phase inverters, switchboard upgrades and the AusNet assessment fee all add cost. Treat home price indexes as a floor, not a quote, and ask for every rural extra to be listed separately. You can send a farm solar enquiry once you have your bills and a rough idea of which sheds you want covered.

What will a careful farm provider check?

A provider who knows rural work will:

• read a full year of interval data or bills for each meter, including the milking season peaks
• confirm the supply type with AusNet records and the meter, not guess it from the poles
• inspect the shed roof sheets, purlins and fixings for rust and load capacity
• check the distance from array to switchboard and size cables for the voltage drop
• design to AS/NZS 5033 for the PV array and AS/NZS 3000 for the wiring
• keep inverters and batteries clear of fuel, fertiliser, chemicals and hay
• plan safe access for maintenance and for firefighters

They should refuse to put an array on a roof that will not last the life of the panels, and they should not promise an export figure above what AusNet approves.

Local conditions around Maffra and Stratford

Around Maffra, with its dairy base, a shed roof near the vat room is often the first place a provider looks. Out towards Stratford on the Avon River, mixed farms with sheep, cattle and vegetables have more varied loads, so a provider will want to see when each pump and cool room runs. Properties on low ground near rivers should mention any flood history so ground mounts and inverters can be placed above it.

Next step: send your farm load details

To ask for a farm or shed solar quote, give the property’s locality, whether the supply is single phase, three phase or SWER if you know, and which buildings and pumps you want covered. Attach the last twelve months of bills for each meter, and photos of the shed roof, the switchboard and the meter. Say when milking or pumping happens each day, and whether you want a battery or an off-grid system for a remote house.

Send a job enquiry