SMA Energy vs NEPViewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SMA Energy
Monitor your home energy system and manage energy flows efficiently. Optimize solar power usage, track electricity production and consumption, and control electric vehicle charging. Take control of your personal energy transition.
- Energy system overview
- Real-time data visualization
- Solar power forecasting
- Energy flow optimization
- Electric vehicle charging control
- Sustainable energy management
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Thanks to the SMA Energy app, you can see all the most important data relating to your SMA Energy System in a clearly structured format. You can intelligently manage energy flows in your household or charge your electric vehicle – sustainably with your own solar power or at high speed if you’re in a hurry. Thanks to the SMA Energy app, you can have your own personal energy transition in your pocket. * Energy system at a glance, wherever you are * In the visualization area, you can find all the most important energy and power data for your SMA Energy System. Whether daily, weekly, monthly or yearly, you can see exactly how much electricity your PV system produces, what it was used for and how much grid-supplied power you have remaining. This enables you to keep constant track of your energy budget. * Optimizing and managing energy flows * In the optimization area, you can view current forecasts for solar power production. The app shows you how to use your energy even more sustainably. For example, you can automatically utilize your own, self-generated solar power as efficiently as possible for your own needs and reduce your grid-supplied power. * Charging electric vehicles * Do you drive an electric vehicle and want to refuel it with your own solar power using the SMA EV Charger charging solution? In the e-mobility area, you can control your car’s charging process easily and efficiently. You can choose between two charging modes: Forecast-based charging enables charging at minimal cost and with the peace of mind that your vehicle will be ready to go when you need it by configuring a charging target; optimized charging means intelligent charging of the vehicle with self-generated solar power. Thanks to the SMA Energy app, you can use your self-generated solar power from your SMA Energy System in a highly sustainable manner and optimize your energy budget. The app is your perfect companion for the energy transition at home and the mobility transition on the road.
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.
Screenshots
Verdict
The clearest difference is rating: SMA Energy at 3.8 against NEPViewer's 2.0. SMA Energy also leads on ratings volume (1.4K vs 5) and review sentiment (29% vs 14%). NEPViewer's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model 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.
SMA Energy holds the better App Store score, 3.8 against 2.0. That said, the two scores are not equally well evidenced: SMA Energy has 1.4K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 29% of SMA Energy's written reviews are positive against 14% of NEPViewer's.
SMA Energy ships an update every 2 months, NEPViewer every 3 weeks. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.
| Parameter | SMA Energy | NEPViewer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (1.4K ratings) — better | 2.0 (5 ratings) |
| Positive reviews | 29.0% of reviews — better | 13.8% of reviews |
| Number of ratings | 1.4K — better | 5 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 171 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | SMA Solar Technology AG | Northern Electric & Power Inc |
Customer experience
SMA Energy
NEPViewer
User reviews
SMA Energy
From 1.4K App Store ratingsWhat we love
- 🚀 Accurate current generation data
- 👍 Improved app design and visuals
- 💡 Expanded functionality (e-mobility, forecasting)
- 🔋 Reliable performance
Room to improve
- 🐛 Frequent app crashes or freezes
- 🕰️ Slow data updates and loading times
- 📊 Limited historical data and analytics
- 🔍 Lack of detailed system information
- 🔌 Incompatibility with older devices/OS
NEPViewer
From 5 App Store ratingsWhat we love
- 👍 Intuitive and easy to use (some users)
- ✨ Modern look and feel (some users)
- ✅ App does what it's supposed to (sometimes)
Room to improve
- 🐛 Frequent crashes and closing
- ❌ Login and password reset issues
- 📉 Inaccurate or delayed data
- 🚫 Loss of important features (panel view, daily graphs)
- 🖥️ Poor iPad/landscape support
Bugs and requests
SMA Energy
Reported bugs
4 issues- Incorrect or missing generation data
- Unreliable login and password reset functionality
- Inconsistent app behavior across devices
- Inability to access system logs and diagnostics
Requested features
5 requests- Ability to customize data views and graphs
- Improved notification and alert system
- Integration with home automation and smart devices
- Support for off-grid and battery-only systems
- Easier system registration and data migration
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
Show 7 moreShow fewer
- 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
Show 2 moreShow fewer
- More accurate real-time data
- Improve scaling of axes in graphs
In-app purchases
SMA Energy
No in-app purchases
NEPViewer
No in-app purchases









