Charge your EV
on free solar
automatically.

Connect your solar inverter and EV once. Gridio handles the rest, maximising self-consumption and saving you from expensive grid imports.
30 days free trial
⭐⭐⭐⭐⭐ 4.8 on the App Store
Inverters supported
SolarEdge SMA Fronius Huawei Ferroamp Growatt Kostal Sofar Solax Solis Sungrow + more
Smart charging modes

See exactly what Gridio does differently

Switch between modes to compare how your EV charges without Gridio vs. with solar or hybrid charging.

Charging starts the moment you plug in EV charges immediately –
Battery level Solar output Grid charging Gridio waits

Grid charging by default

Most EVs charge immediately at plug-in, ignoring grid prices and solar production. Your surplus solar exports for a low feed-in rate while you pay full grid price to charge.

More grid use, solar surplus wasted

What Gridio changes

How it connects Your inverter, your EV, one app – no hardware
Solar inverter Gridio reads your live solar output via cloud API SolarEdge · SMA · Fronius · Huawei · Growatt · Solax · Solis · Sungrow + more
Gridio app Calculates surplus and decides when and how fast to charge iOS & Android · No hardware needed
Your EV Gridio controls charge start, stop, and speed via OEM API Audi · BMW · CUPRA · KIA · Mercedes · MINI · SEAT · Škoda · Tesla · Volkswagen
The Gridio app Solar charging in your pocket Connect your inverter and EV once. Gridio handles everything automatically – no manual adjustments, no timers, no guesswork.
Gridio solar inverter connection screen
Inverter connected Pair your solar inverter in seconds – no hardware, no electrician
Gridio solar charging active screen
Your settings, your rules Set your solar threshold and ready-by time – Gridio does the reste
Gridio solar charging settings screen
Solar charging active Gridio tracks your live solar output and adjusts charging in real time
EV compatibility Gridio adapts to your car Different cars expose different levels of charging control via their manufacturer's API. Gridio uses the best mode your car supports – automatically.
Continuous modulation

Follow the sun,
amp by amp.

If your car supports variable current, Gridio tracks your solar surplus in real time – 6 A, 8 A, 11 A – so not a watt is wasted to the grid.

Tesla · all models
5 2.5 0 AMPS TRACK SURPLUS 00 06 12 18 24
Smart switching

On during surplus,
off during import.

For EVs that only accept fixed current, Gridio switches charging on whenever rooftop output clears a threshold – and off the moment a cloud would force grid import.

VW · Skoda · Cupra
5 2.5 0 ON ABOVE 6 A 00 06 12 18 24
Smart start & stop

Precision-
timed sessions.

For cars with limited remote control, Gridio pre-schedules a single start and stop across the day's cheapest window – solar block, off-peak block, or both.

BMW · Hyundai · Kia · Mercedes · Renault · Seat + more
5 2.5 0 OFF-PEAK SOLAR 00 06 12 18 24
The old way vs Gridio Skip the CT clamp. Skip the electrician. Solar EV charging used to mean extra hardware and manual scheduling. Here's what changes with Gridio.
The old way With Gridio
Solar timing
Set a timer manually and hope solar coincides with it
Reads live inverter output and starts charging automatically when there's surplus
Cloudy days
EV pulls expensive evening grid power regardless
Falls back to the cheapest overnight grid window automatically
Surplus solar value
Exported to the grid at under 5 ct/kWh feed-in rate
Goes into your car battery – worth 3–5x more than the export rate
Knows car battery level
No – charger has no idea how full the car is
Yes – reads state of charge directly from car APIKnows exactly how much charge is still needed
Car ready by morning
Not guaranteed – only charges when solar is available
Yes – fills remaining kWh from cheapest overnight tariff if needed
Hardware needed
CT clamp on fuse box + electrician visit€50–200 for the sensor, plus installation cost
None – 100% software, reads your inverter's cloud APISet up in 2 minutes from the app
Works with any charger
Usually locked to one specific charger brand
Any charger – even a standard wall socket
Why it matters Two real wins on every sunny day
€0 Estimated annual saving by using surplus solar to charge instead of buying grid energy in the evening
Without solar chargingWith Gridio
Skip low-value exports
€0 Estimated annual saving on grid fees and peak tariffs by not charging from the grid in the evening
Evening grid chargingSolar + smart grid
Save on peak tariffs
Estimates: 10 kWh avg daily solar surplus, ~€0.12/kWh export vs. €0.28/kWh grid. Actual savings vary.

Frequently asked questions

Who is Gridio's solar charging for?

Around a half of EV drivers have their own solar panels at home. Gridio's solar charging magically connects to both your EV and solar inverter, without any need for a hardware setup and enables you to enjoy your EV automatically charging if you have sufficient solar available.

What is the benefit of solar charging?

With solar booming, nowadays when you export your solar energy, you get paid very little or nothing, or even charged by negative prices.

Charging your EV when your solar runs 'hot' is a perfect way to maximise your solar self-consumption. On the one hand you do not export low-value solar and in addition you have to buy less or no additional energy later to get your car charged.

As a bonus - when you solar charge, you also do not have to pay grid fees later when you would have otherwise charged your car at night.

Which solar inverter brands does Gridio support?

We currently support the following inverters: SolarEdge, SMA, Fronius, Huawei, Ferroamp, Growatt, Kostal, Sofar, Solax, Solis, Sungrow and we're constantly adding more!

Should your inverter not be on the list, then be sure to drop a message to support@gridio.io and we will do our best to add it soon!

How does solar charging by Gridio work in practice?

After you've paired your EV and inverter in the app, Gridio prioritises charging during solar hours over regular smart charging.

For most brands, Gridio modulates the EV power to match the solar output or excess (see below), so when there is little sun we charge more slowly and when there's more, we power up your EV faster!

Today, only Tesla supports perfect modulation, so for other brands we ask you to tell us, how much solar you like to see produced / exported before we kick-start your EV charging - to ensure, we do not trigger too many grid imports when they are not necessary.

Does Gridio account for grid exports?

If you inverter is connected to your smart meter, we will optimize based on your actual export data. So when you turn on your oven, then we also charge your EV more slowly if not enough solar is available.

If your inverter is not connected to your smart-meter, have no fear! We ask you to enter your typical home load (1-2kW), so we manually estimate your excess solar availability.

Sounds exciting - how can I get started?

All you need to do is in the Gridio app, pair your EV (if you've not already done so) and the from Connections also add your solar inverter. Answer the simple set up questions, and you can be solar charging in minutes!

Ready to charge with your own sunshine?

Download the Gridio appDownload the app
Download Gridio now to get started!
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