Top 10 Solar Panel Installers in South Australia

Solar Choice's price index for 1 October 2026 puts the average Adelaide price at $5,320 for a 6 kW system and $6,140 for 7 kW, after the STC discount and including GST. A 6.6 kW system usually falls between those. Our Adelaide guide finds most quality 6.6 kW systems land between about $4,500 and $9,000 after STCs, depending on hardware. A battery typically adds $8,000 to $15,000 before the federal discount. Check that every quote states the export arrangement, because flexible exports need a compatible, internet-connected inverter.

As of October 2026 there is no South Australian rebate for solar panels, and the Home Battery Scheme is closed to new applications. Federal STCs are the main discount. A 6.6 kW system in Adelaide, which is in zone 3, earns about 45 certificates in 2026, worth up to about $1,800, and about 36 in 2027. Batteries get 6.8 federal certificates per usable kWh on the first 14 kWh until 31 December 2026. The REPS virtual power plant incentive, paid through retailers, is reported as open only to priority group households for the rest of 2026, at up to about $2,050.

South Australia has no minimum feed-in tariff. ESCOSA runs a monitoring regime instead of setting a rate. Retailer rates we checked in August 2026 ranged from 0.5c to 8c per kWh, with the higher rates usually capped. For exports, SA Power Networks gives new solar and battery customers a choice. A fixed export limit is set between 0 and 1.5 kW per phase, depending on the network area. Flexible exports allow up to 10 kW per phase when the network has room, and need a reliable internet connection. Some single wire earth return sites may export nothing.

South Australia has some of the strongest battery economics in the country because grid power is expensive. The AER's 2026-27 reference price for the SA Power Networks area uses a usage rate of about 41.9c per kWh, while feed-in tariffs are a few cents. Every kilowatt hour you store and use at night saves far more than exporting it earns. The federal discount is designed to cover around 30 per cent of the upfront cost of an eligible battery. Size the battery to your evening use, and make sure the inverter is set up for flexible exports.