EV charger monitoring
One App - Any Brand.
Whatever charger you have, iVamp shows you what it's really using. Add a small Shelly energy meter to your charger's circuit and watch charging power live, see the kWh and the cost every day at your own tariff, and get tips on charging when electricity is cheapest or the sun is shining.
Your charger's app is for controlling the charger. iVamp is for seeing what charging means for your home - next to your solar, battery and everything else, in one app, whatever brands you have. Most people use both.
| Your charger's app | iVamp | |
|---|---|---|
| Start, stop and schedule charging | Yes | No - keep using your charger's app |
| Charging shown alongside your solar, battery and house use, on one screen | Rarely | Yes |
| One app for your charger, inverter, battery and meters - whatever the brands | One app per maker | Yes |
| What the car used, measured by a separate meter on the charger's circuit | The charger's own figures | Yes |
| Cost at your own tariff, next to what the rest of the house cost | Varies by app | Yes |
| Keeps working when the maker's servers, or your internet, are down | Often not | Yes - it works on your own network |
| Keeps your history if you change charger, or car | Usually not | Yes |
| Your installer can keep an eye on it, with your permission | Varies | Yes, with iVamp Trade |
Charger apps differ - some show costs or solar charging for their own charger. iVamp's point is the whole picture, from any make, in one place.
Live charging power on gauges and dashboards, with your car shown in the home's power flow as "EV charge" or "EV idle".
Daily kWh for the charger in History, priced at your own tariff - not an estimate.
Savings tips that point the car, and other flexible loads, at your tariff's cheapest window or your expected solar output.
The charger is kept separate from the house totals, so charging is never counted twice.
A notification or email if charging stops overnight, or runs higher than it should.
Timed captures exported as CSV or PDF with iVamp Pro - handy for business mileage, a landlord or a fleet claim.
iVamp measures the electricity going to the charger - it doesn't need to talk to the charger itself. So the make and model don't matter:
Got a Tesla Wall Connector Gen 3? From the next release iVamp can also read it directly over your Wi-Fi - charging power, this session's energy and the car's status - with no meter and no Tesla account.
Got a Sigenergy system with a Sigen EV charger? iVamp reads the charger through your Sigenergy system: the DC Charging Module (with the car's charge level) and, from the next release, the Sigen AC charger - again, no meter needed.
On a single-phase supply, a two-channel Shelly EM covers the charger and the whole house in one unit. Three-phase chargers (11–22 kW, common across much of Europe) use a Shelly Pro 3EM. The meter's clamp goes round the charger's supply cable. It must be fitted by a qualified electrician. Not sure which suits your supply? Which meter do I need?
| Your setup | Shelly meter | Channel 1 | Channel 2 |
|---|---|---|---|
| Single-phase home charger (up to 7.4 kW) | Shelly EM Gen3, or Shelly Pro EM-50 (DIN rail) | House supply, tagged Grid | Charger circuit, tagged EV |
| Single-phase, plus solar | Two Shelly EMs | Grid / Solar | EV / spare |
| Three-phase charger (11–22 kW) | Shelly Pro 3EM on the charger's supply | All three phases of the charger, tagged EV | — |
iVamp shows and reports what the charger uses. It doesn't start, stop or schedule charging, show the car's battery percentage, or pull per-session reports from the charger - control stays in your charger's own app.
In iVamp: Devices › Find new device, scan the network, or add it by its IP address.
Open the power-flow tile's settings, tap the charger's channel and choose EV. The house supply stays as Grid.
Put the charger's channel on your dashboard, so charging power is visible at a glance.
Pick the charger channel to see its daily kWh and cost at your tariff.
Optional: for example, tell me if charging stops during an overnight charge.
Keep your charger's app for starting, stopping and scheduling charging. iVamp adds the whole picture: the charger next to your house use, priced at your tariff, solar, battery & heat pump use, in one app for every brand you have - and it keeps working on your own network if the maker's servers are down.
Yes. iVamp measures the electricity going to the charger, so the make and model don't matter.
No. It shows and reports what the charger uses; control stays in the charger's own app.
No. The Shelly clamp is separate from any clamp your charger uses.
It sits in or near your fuse box (consumer unit) and needs mains power, so have a qualified electrician fit it.
Not to start with. The free version includes one real device, so a single Shelly EM monitoring the charger and the house works free, with the last 7 days of history. Pro adds unlimited devices, full history and CSV export.
No. iVamp reads the meter on your own network. Data only leaves it if you choose to share readings with your installer.
No. That needs a direct link to the car or charger, which this setup doesn't have.
Free to download for Windows, Mac and iPhone. Android is coming soon.
Any qualified electrician can fit a Shelly energy meter - ask whoever installed your charger. Near the New Forest in the UK, Flowenergi, the electricians behind iVamp, fit them and set them up with iVamp, often on the same visit as a new charger.
A Shelly EM adds about an hour to a charger install, works with every make, and gives your customer something to open every day. With iVamp Trade you can keep an eye on their system too, with their permission. Copy and adapt the wording below.
For customers who already have a charger, or to add to a new-charger quote. Fill in the bits in [brackets].
Subject: See what your car costs to charge, live Hi [Customer name], Now that your [charger make] is in, would you like to see exactly what it costs to run? For [price] fitted, I can add a small Shelly energy meter to your fuse box. With the free iVamp app you'll then see: - your car's charging power live, on your phone or PC - how many kWh it uses each day, and the cost at your own tariff - the cheapest times to charge, from your tariff and solar forecast - an alert if charging stops overnight The meter's second channel monitors your whole house as well, so you'll see your total usage and costs in the same app. It works with any charger and doesn't change how your charger works. If you'd also like me to keep an eye on things remotely, I can link it to my iVamp Trade portfolio, and I'll be alerted if anything faults. Reply to this email or call [phone] to book it in - it takes about an hour. [Your name] [Business name]
How much does your car actually cost to charge? With a Shelly meter on your charger's circuit, iVamp shows live charging power, kWh and cost every day at your own tariff - whatever make of charger you have. Free on Windows, Mac and iPhone.
Fitting EV chargers? Add a Shelly EM on the same visit and your customer can see exactly what charging costs them, live, in iVamp - no charger integration or cloud account needed. It works with every make, and the second channel monitors the whole house too.
Any EV charger + a Shelly EM + iVamp = live charging power, daily cost at your tariff and the cheapest time to plug in. Works with Wallbox, Easee, Zaptec, zappi, Tesla and more.
Use a photo of a tidy fuse-box install, or a dashboard screenshot showing the EV in the power flow.
iVamp is an independent app and is not affiliated with or endorsed by Shelly or any charger manufacturer. Product names are trademarks of their owners.
