When your EV charger app stops working — refusing to connect, showing the charger as offline, or failing to start or stop a session — the fault is almost always in one of three places: the Wi-Fi connection between your charger and your router, the app itself (an outdated version or a corrupted local session), or the charger manufacturer’s cloud servers. This guide covers each scenario for the four most popular smart home chargers in the UK.
Key Takeaways
- Most app issues resolve by checking the charger’s Wi-Fi connection first — a dropped connection puts the charger into offline mode and disables all remote features.
- Closing and reopening the app, or force-quitting and restarting it, fixes the majority of app-side glitches without any other action.
- App functionality (scheduling, remote start/stop, tariff integration) requires a live cloud connection — the charger will still charge locally when it is offline, but you cannot control it remotely.
- Firmware updates pushed overnight can change app behaviour or reset scheduling settings — check for update notes in the app or manufacturer release notes if behaviour changes suddenly.
- Each of the four chargers covered here (Hypervolt, Ohme, Zappi, EO) has a specific offline charging mode that allows manual operation when the app or cloud is unavailable.
Why EV Charger Apps Stop Working
Smart home chargers communicate via your home Wi-Fi to the manufacturer’s cloud servers. The app on your phone connects to the same cloud. When any link in this chain breaks — phone, Wi-Fi, charger, or server — remote control stops working.
The chain has four potential failure points:
- Your phone or the app itself — outdated app version, corrupted cache, expired authentication token
- Your home Wi-Fi — router issue, SSID change, password change, or the charger has moved out of Wi-Fi range
- The charger’s internal Wi-Fi module — firmware bug, hardware fault, or corrupted configuration
- The manufacturer’s cloud servers — planned maintenance, an outage, or a change in API structure
Most problems are at points 1 or 2 and are fixable without an engineer.
General Troubleshooting Steps (All Chargers)
Work through these before moving to charger-specific steps:
Step 1: Force-Quit and Reopen the App
Close the app completely (swipe it away from recent apps on iOS or Android), then reopen it. This clears any corrupted local session and forces a fresh authentication with the server. If the charger appears offline after the restart, proceed to Step 2.
Step 2: Check the Charger’s Wi-Fi Connection
Look at the charger unit’s LED or status indicator. Most smart chargers show a specific colour or pattern when they have lost their Wi-Fi connection:
- Hypervolt Home 3: a pulsing amber or orange LED indicates no Wi-Fi
- Ohme Home Pro: a red LED or blinking pattern indicates connectivity loss
- Zappi: the display will show “No WiFi” or similar
- EO Mini Pro 3: the app dashboard shows the unit as “Offline” with a connectivity icon
If the charger has lost Wi-Fi: check your router is working, confirm the Wi-Fi password has not changed (relevant if you recently changed your router or broadband provider), and check whether other nearby devices on the same Wi-Fi band are connected. Most home chargers use the 2.4 GHz band — confirm your router broadcasts this separately from the 5 GHz band.
Step 3: Check for a Server Outage
If your Wi-Fi is fine and the app still shows the charger as offline, check the manufacturer’s status page or social media for any reported server issues. Server outages are rare but do occur, particularly during major firmware rollouts. During an outage, the charger will continue to operate locally (manual charging will work) but remote control via the app will be unavailable until service is restored.
Step 4: Check for an App Update
Open the App Store (iOS) or Google Play Store (Android) and check whether an update is available for your charger app. App updates sometimes include authentication changes that require the old version to be replaced. Install any available update, then try logging out and back in.
Step 5: Power-Cycle the Charger
Turn the charger off at its dedicated isolator switch, wait 30 seconds, and switch it back on. The charger will go through its boot sequence (typically 60 to 90 seconds) and reconnect to Wi-Fi. Once the connection indicator shows green or solid, reopen the app.
Charger-Specific Issues
Hypervolt Home 3
“Charger shows offline in app”
The Hypervolt app requires an active Wi-Fi connection for all remote features. If the charger is offline, remote start, scheduling, and tariff integration are unavailable. The charger will still accept a charge session initiated manually (connect the cable and the car will begin charging automatically if no schedule is blocking it).
To reconnect: use the Hypervolt app’s reconnection flow under Settings > Charger > Wi-Fi Setup. You will need the charger’s serial number (printed on the unit) to re-pair.
“App shows a charge schedule but the car isn’t charging”
Check whether the schedule window is currently active. If the car is connected outside a scheduled window, the Hypervolt will wait until the window opens. To override a schedule and charge immediately, use the “Boost” feature in the app.
Ohme Home Pro
“Ohme app not showing energy tariff data”
The Ohme app connects to your energy supplier’s API to retrieve tariff rate data for smart scheduling. If the tariff data is missing, the app cannot calculate the cheapest charging window. This usually means the API connection to your supplier has lapsed — go to Settings > Energy Tariff in the app and re-authorise the connection.
“Ohme app shows ‘Waiting to charge’”
This status means the charger is connected and ready but is waiting for the scheduled window to open, or for tariff data to arrive to determine the cheapest time. If you need to charge immediately, use the “Charge Now” button to bypass the schedule.
Zappi (myenergi)
“Zappi shows ‘Charge Delayed’”
This message means the Zappi has signalled it is ready to charge, but the vehicle has not accepted the charge request. This is most often a vehicle-side issue, not a Zappi fault. Check the car’s settings for any charge limits or scheduled charge windows set in the vehicle infotainment. Unlocking and relocking the car can reset the charge port and resolve this.
“myenergi app not showing Zappi”
If the Zappi has dropped off the myenergi app, try a hub power-cycle (if you have a myenergi hub) or reconnect the Zappi to Wi-Fi via the myenergi app’s add device flow. The Zappi can also be controlled directly on the unit using the rotary dial, without the app.
EO Mini Pro 3
“EO app showing charger as ‘Disconnected’”
The EO app uses a cloud-based connection. If the charger shows as disconnected, try the general steps above. If reconnection via the app fails, EO’s support team can remotely diagnose the charger’s connectivity status and push a reconnection command.
“EO app schedule not running”
Check that push notifications are enabled for the EO app on your phone — the scheduling engine relies on the app being permitted to run background processes. Also confirm the time zone in the app matches your local time; incorrect time zones can cause schedules to run at the wrong hour.
When None of These Steps Work
If the charger remains offline after power-cycling, re-pairing to Wi-Fi, and updating the app:
- Contact the charger manufacturer’s support team directly; most offer remote diagnostics via the cloud and can often identify the fault without a site visit
- If the charger is under warranty, the manufacturer may send a replacement unit or arrange an engineer visit
Your charger will continue to charge normally when the cable is connected, even if the app is not working. You simply lose remote control, scheduling, and tariff integration until the connectivity is restored.
For a broader guide to EV charger faults beyond app issues, the EV charger troubleshooting hub covers both hardware and software problems across home and public chargers.
Frequently Asked Questions
Will my EV still charge if the app isn’t working?
Yes. Smart chargers operate in local mode when the cloud connection is unavailable. Connect the cable and the car will begin charging (subject to any locally stored schedule on the charger itself). Remote features — starting, stopping, scheduling, and tariff integration — require a live cloud connection, but the core charging function does not.
Why did my charger app stop working after I changed my router?
When you change your router or broadband provider, the Wi-Fi network name (SSID) and password typically change. Your charger’s saved Wi-Fi credentials are no longer valid, so it cannot connect and appears offline. Use the charger app’s setup or Wi-Fi reconnection flow to enter the new credentials. You will need the charger unit in range and its serial number (printed on the unit) to complete this process.
How do I know if the problem is with the app or with the charger’s hardware?
If the charger’s LED or display shows a normal operational status and the app shows it offline, the problem is in the connectivity chain (Wi-Fi, cloud, or app), not the hardware. If the charger’s LED is showing an error pattern (amber, red, or a specific flash sequence described in the manual), there may be a hardware fault. Check the manual for the specific LED code and contact the manufacturer’s support team.