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Note: This is an illustrative scenario representing a typical household configuration—not a documented case study from a specific customer. Figures shown are typical ranges based on industry patterns and manufacturer specifications.
Combining solar, battery, and EV charging with smart tariff optimisation
Typical Capacity
13.5-20 kWh
Typical Solar
10-13 kW
Typical Savings
$1,800-2,800/year
Typical Payback
6-8 years
Adding an EV to a household significantly increases electricity consumption. Optimising the whole energy system - solar, battery, and EV charging - can minimise costs and maximise solar utilization.
An EV owner with 10kW+ of solar panels and daily driving of 40-60km requires roughly 10-15 kWh of charging per day. Switching to a Time of Use tariff can help optimise when power is purchased vs. generated.
Common goals include: charging the EV from solar during the day, avoiding peak rates (3pm-9pm weekdays), and having backup power for the home during outages. Some EV owners also want partial EV charging capability during outages.
Larger battery capacities (13.5-20 kWh) are often needed to handle both home evening usage and EV charging coordination. If you have a Tesla EV, the Powerwall integrates directly through the Tesla app.
For Tesla systems, using a Tesla Certified Installer ensures proper integration. For other brands, look for installers experienced with EV-battery coordination and Time of Use tariff optimisation.
Note: These are typical outcomes based on industry patterns. Individual results vary based on actual usage, solar generation, and system configuration.
These are typical figures. Get matched with installers or use our calculator for estimates based on your specific situation.