How does OverflowEV charge from solar?

OverflowEV watches your solar generation and home load. When there is surplus, it starts or adjusts EV charging. When clouds remove the surplus, charging pauses so you are not buying grid power by mistake.

Which solar inverters and devices does OverflowEV support?

Live integrations include Tesla, AlphaESS, GoodWe, SolarEdge, Growatt, Sungrow, Enphase, Solax, Solis, Fronius, FoxESS, OCPP, Home Assistant, plus regional monitors and Amber Electric in Australia.

Is OverflowEV only available in Australia?

No. OverflowEV works worldwide. Set your country, currency and timezone in the app. Amber Electric and some energy monitors are Australia-specific extras.

What makes OverflowEV different for solar EV charging?

OverflowEV is built around Free Solar excess charging with a live solar-home-EV-grid view, global inverter and OCPP coverage, local currency and rates, and schedules for departure: so surplus goes into the car without babysitting the charger.

Where do I get the OverflowEV iPhone app?

OverflowEV is on the App Store at https://apps.apple.com/app/overflowev/id6797779321. Use the Get the app page on overflowev.com. If you still have the TestFlight beta, install the App Store version and delete TestFlight.

What is excess solar or surplus solar EV charging?

Excess or surplus solar is rooftop generation left after the home has used what it needs. OverflowEV Free Solar mode uses that spare power to charge the EV and pauses when the surplus disappears, reducing cheap daytime exports and expensive grid top-ups.

OverflowEV

Sun comes out.
Car fills up.

Automatic excess-solar EV charging for homes worldwide. Put spare sunshine into the car: not cheap exports back to the grid.

Get Started

The round trip

Your retailer loves your EV.

All day they buy your spare sunshine for cents. Then when you plug in, they sell power back at a premium. OverflowEV ends the round trip - surplus goes from your roof to your car.

Export: what retailers typically pay for each kWh you send to the grid
Import: what you often pay to buy that same energy back to charge the car
The spread: the markup on your own sunshine if you charge from the grid later

Feed-in and usage rates differ by country, retailer and time of day — the point is the spread. OverflowEV helps put spare generation into the car first. Set your local currency and plan rates in the app.

How it works

Set up once. Then it’s automatic.

01
Connect

Link your solar inverter, energy monitor and EV or OCPP charger. No rewiring, no new hardware on the roof.
02
Watch surplus

OverflowEV reads generation and home load live. When spare solar appears, Free Solar mode puts it into the car.
03
Drive on sunshine

Charging starts and stops with the weather. Schedules still cover nights and early departures when you need them.

Why OverflowEV

Built for surplus: not set-and-forget grid draw.

Plenty of apps can start a charge. OverflowEV is built so spare rooftop solar actually reaches the car: live surplus awareness, the inverters and chargers homes already own, and controls that pause when the sunshine disappears.

Free Solar that follows the weather: charge from surplus, pause under cloud cover, so daytime charging does not quietly buy grid power.
Live solar → home → EV → grid view: the same energy picture as the app, so you can see where every kilowatt is going.
The kit you already own: Tesla, AlphaESS, GoodWe, Enphase, SolarEdge, Sungrow, Growatt, Solax, Solis, Fronius, FoxESS, OCPP wallboxes, Home Assistant, plus regional monitors and Amber Electric in Australia.
Cars and wallboxes: Tesla vehicles plus OCPP chargers where enabled, without ripping out the inverter you already own.
Schedules when you need certainty: solar priority by day, guaranteed top-ups before early departures.
Secure cloud links: no inbound ports on your home network; connect once and leave it running.

Supported brands

Works with the kit homes already own

Live cloud integrations for solar, monitoring, vehicles and tariffs: stay in the ecosystems you chose, wherever you are.

OCPPWall chargers

Home pushHome Assistant

Solar

Tesla Energy, AlphaESS, GoodWe, SolarEdge, Growatt, Sungrow, Enphase, Solax, Solis, Fronius, FoxESS, Home push

Monitoring

Emerald, Powerpal, Solar Analytics, Wattwatchers, Powersensor, Home push

Vehicle & tariff

Tesla vehicles, OCPP wallboxes, plus Amber Electric in Australia

Every brand above is live in production today. See the full who we support list for setup notes.

Features

Everything you need: nothing you babysit

Free Solar mode

Charge only from spare solar. Pause when surplus disappears.

Live energy view

Solar, home, EV and grid in one calm dashboard.

Smart schedules

Guaranteed top-ups before departure, solar when it’s there.

Secure cloud

Encrypted links: no inbound ports on your home network.

Ready to stop paying for daytime charging?

Join households worldwide using OverflowEV to put spare sunshine into the car, automatically.