20kW Solar System | Cost, Output & Annual Savings (2026)
This article provides an overview of the ranges of prices, energy yields (in kWh), and financial returns that a business may expect
Across Australia, a quality 20 kW array installed on a standard iron or tiled roof with no major upgrades falls between $15 000 and $22 000, including GST and the federal STC incentive. That headline range converts to roughly $750 – $1 100 per installed kilowatt. How many panels are in a 20kw solar system? How much area is required?
At SCS Australia, we create solar powered shipping containers that combine renewable energy technology with the strength and mobility of a shipping container. These self-sufficient units are ideal for powering off-grid operations, mobile businesses, events, and remote projects—all while reducing carbon footprint and cutting energy costs.
In 2016, a 20 kW array routinely cost ~ $32 000 (≈ $1.60 /W), matching the $1.62 /W national average recorded that December. By mid-2025, bulk pricing sits near $0.90 /W, halving nominal system cost to ~ $18 000. The drop stems from cheaper modules, a stronger STC market, and intense installer competition.
It's a modified shipping container built to house solar panels, batteries, inverters, and other off-grid power systems. These units are ideal for powering remote sites, construction camps, emergency setups, or as a portable backup energy system. What's included in a solar container build?
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