NEPViewer vs xDTU Connect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NEPViewer
Monitor your BDM micro inverter system in real-time. Track system output and energy harvest, or view installed systems and their performance. Requires registration on the NEPViewer website.
- Real-time system monitoring
- Track energy harvest
- View installed systems
- Check system performance
- Multi-language support
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NEPViewer provides real-time monitoring for BDM micro inverter systems from Northern Electric & Power Inc. (NEP) - End user can easily check on system output and energy harvest - Installer can check a list of systems installed and performance A username and password from https://www.nepviewer.com is required. User of this APP needs to register on the NEPViewer website first. NEPViewer supports multiple languages including English, Spanish, German, French, Portuguese, Polish, Japanese and Chinese.
xDTU Connect
Monitor your ESP32 hardware with OpenDTU firmware. View telemetry data directly on your device or through widgets. Ensure read-only web access is configured for optimal performance.
- ESP32 hardware monitoring
- OpenDTU firmware integration
- Telemetry data display
- Widget support
- Feedback and suggestions section
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This app is an iOS client for your ESP32 hardware with OpenDTU firmware on board. The app allows you to receive telemetry data from the OpenDTU device and display it on the app screen or in a widget. IMPORTANT: make sure that you have read-only access to web interface without password (OpenDTU Settings > Security Settings > Permissions) Check out the information section if you have any questions, want to leave feedback or have any suggestions for the development of the application.
Screenshots
Verdict
The clearest difference is update cadence: xDTU Connect at weekly against NEPViewer's every 3 weeks. NEPViewer's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.2). On price, review sentiment, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
NEPViewer ships an update every 3 weeks, xDTU Connect weekly. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.
| Parameter | NEPViewer | xDTU Connect |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (4 ratings) — better | — |
| Positive reviews | 14.0% of reviews | 20.0% of reviews — better |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 62 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Northern Electric & Power Inc | Aliaksandr Strakovich |
Customer experience
NEPViewer
xDTU Connect
Bugs and requests
NEPViewer
Reported bugs
12 issues- App closes immediately on launch/login
- Blank error box when resetting password
- App offline frequently
- Inaccurate wattage readings
- Cannot connect to all inverters
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- Serial number error during inverter pairing
- Display issues on iPad (white screen, cut-off content)
- App crashes after iOS updates
- Network anomaly errors
- Login issues after updates
- Data not refreshing or delayed
- App requires daily reinstallation to view data
Requested features
7 requests- Restore panel performance view
- Restore daily/hourly graphs and curves
- Improve iPad/landscape mode support
- Better customer support
- Option to stay logged in
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- More accurate real-time data
- Improve scaling of axes in graphs
xDTU Connect
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NEPViewer
No in-app purchases
xDTU Connect
No in-app purchases
