Solar Excess Charging
Automatically charge only from spare solar, and pause when clouds take the surplus away.
OverflowEV
Put your spare solar into your car.
OverflowEV automatically charges your electric vehicle using excess rooftop solar, helping Australian households reduce charging costs while maximising self-consumption.
Why OverflowEV
Stop exporting cheap solar. Start charging for free.
Built for Australian homes that want smarter self-consumption, without babysitting the charger.
- Uses excess solar instead of exporting to the grid
- Saves money every day by avoiding grid import for charging
- Automatically starts and stops charging as surplus rises and falls
- Works around scheduled charging when you need a guaranteed top-up
- Prevents unnecessary grid charging during Free Solar mode
- Maximises solar self-consumption across your home and EV
Features
Everything you need for smarter solar charging
Live energy insight, automatic control, and a calm dashboard that stays out of your way.
Smart Scheduling
Charge before departure while still prioritising solar whenever it’s available.
Vehicle Monitoring
Live battery level, charging state and connection status, without constantly waking the car.
Home Energy Monitoring
Monitor your home’s energy usage to calculate available solar for the car.
Live Dashboard
View solar generation, home usage, EV charging and grid import/export in one place.
Secure Cloud Platform
Encrypted cloud connections without exposing your home network or opening inbound firewall ports.
Supported brands
Built to work with the names Australian homes already trust
OverflowEV connects through official cloud APIs, so your inverter, monitor and EV stay in the ecosystem you chose.
Confirmed live paths include Tesla, GoodWe, SolarEdge, Growatt and Sungrow, with more brands shipping as we verify them.
Across Australia
What a typical household pays, and what solar can change
Grid electricity is still a big weekly cost. Put spare sunshine into the car instead of exporting it cheaply, and daytime charging starts to look very different.
NSW
~$2,280/yr
Typical default-offer household electricity bill
VIC
~$1,590/yr
Typical Victorian default-offer household bill
QLD
~$1,990/yr
SE Queensland default-offer household bill
SA
~$2,330/yr
Among the highest grid rates in the country
WA
~$2,260/yr
Typical Perth / SWIS household electricity cost
Your EV
~$15-40/wk
Rough grid cost to charge a daily driver, much of that can come from free excess solar instead
State figures are indicative residential default-offer / typical household benchmarks (approx. 2026). Your bill, tariff and solar size will differ OverflowEV simply helps put spare generation into the car first.
Ready to stop paying for EV charging?
Join Australian households using OverflowEV to put spare sunshine into the car, automatically.