Solar Panels + EV Charger in South Australia: The Complete 2026 Guide
South Australia has one of the highest EV adoption rates in Australia, and combining solar with home EV charging is one of the most financially compelling upgrades you can make. With SA electricity prices at 30–40c/kWh and petrol above $2/litre, charging your EV from solar at effectively 0c/kWh creates enormous ongoing savings. This guide explains how to size your solar system for an EV, what home chargers work best, and what to expect from the combined payback.
What You Need to Know
Zero-Cost Fuel From Your Roof
A typical EV requires 15–20kWh per 100km. At 30c/kWh grid cost vs ~0c/kWh solar, you save $4.50–$6.00 per 100km. At 15,000km/year that's $675–$900 in fuel savings on top of household solar savings.
Size Your System for EV + Home
To charge an EV daily from solar requires an additional 2–4kW of generation capacity beyond your household needs. Most SA EV owners upgrade from 6.6kW to 10–13kW to accommodate EV charging.
Smart Charger + Solar = Maximum Self-Consumption
A smart EV charger (Zappi, myEnergi, Tesla Wall Connector) can be programmed to charge only when solar is generating excess power, maximising free charging and minimising grid use.
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Frequently Asked Questions
What size solar system do I need to charge an EV in SA?
For daytime home charging of a mid-size EV (60–80kWh battery), an additional 3–5kW of solar capacity is typically needed. Most SA homeowners upgrade to 10–13kW when adding an EV.
How much does solar + EV charger cost in SA?
A 10kW solar system costs ~$8,000–$10,000 in SA after STCs. A quality 7kW home EV charger (installed) adds $1,500–$2,500. Total investment: $9,500–$12,500.
What's the combined payback for solar + EV in SA?
With household solar savings ($2,000–$3,500/year) plus EV fuel savings ($700–$1,200/year), combined payback for a solar + EV charger install in SA is often 3–5 years.
Can I export EV charge to the grid in SA?
Not yet at scale — V2G (vehicle-to-grid) is in early trials in SA. SA Power Networks has announced V2G pilot programs, but for now EV batteries are charge-only from the grid/solar perspective.
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