50kW Solar System for Australian Businesses & Farms

A 30 kW solar system is best for small to medium-sized businesses, such as offices, retail outlets, medical centres, restaurants, and workshops with electricity bills of around $1,500–$2,500 per month. This system is also a strong option for larger homes with high energy use or small farms running equipment during the day.

On average, a 50 kW solar system produces around 200–220 kWh of electricity per day, depending on your location, season, and roof orientation. Northern states like Queensland generally achieve higher daily output compared to southern states.

The number of panels depends on the panel wattage:

1. With 500W panels → about 100 panels
2. With 400W panels → about 125 panels

Using high-efficiency panels reduces the total number required and minimises roof space usage.

A 50 kW system usually requires between 250–330 square metres of roof space, depending on the efficiency of the solar panels and the layout of the roof. Large, unshaded, north-facing areas deliver the best performance.

In 2025, the cost of a quality 50 kW solar system in Australia typically falls between $45,000 and $65,000 after Small-scale Technology Certificates (STCs) rebates. The final price depends on factors such as equipment brands, inverter type, and any electrical upgrades required.

Businesses with steady daytime electricity demand benefit the most. Examples include:

1. Manufacturing and production facilities
2. Retail centres and supermarkets
3. Schools, colleges, and universities
4. Hotels, clubs, and hospitality venues
5. Large offices and commercial buildings

These businesses can offset a large portion of their energy consumption directly with solar, leading to faster returns.

Most businesses see a payback period of around 3 to 5 years, depending on energy consumption and local tariffs. With rising electricity prices, the savings often accelerate, making a 50 kW system a highly attractive long-term investment that continues to generate benefits for 20+ years.