NEPViewer vs DAH Solar
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.
DAH Solar
This tool offers intelligent, real-time monitoring and analysis for photovoltaic power plants. It allows users to track the operational status and performance data of their solar energy systems. The application provides comprehensive insights into power plant dynamics.
- Real-time power plant monitoring
- Smart analysis of performance data
- Operational status tracking
- Photovoltaic system management
- Intelligent power plant dynamics
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"DAH Solar," originally known as "SolarUnit," is a photovoltaic power plant management and maintenance tool independently developed by Anhui Daheng New Energy Technology Co., Ltd. It provides comprehensive, fully intelligent, real-time monitoring and smart analysis of power plant dynamics. The application is primarily designed for end-users to monitor the operational status and performance data of their power plants in real time.
Screenshots
Verdict
The clearest difference is rating: DAH Solar at 4.7 against NEPViewer's 2.7. DAH Solar also leads on iOS requirement (13.0 vs 15.0). NEPViewer's advantage is update cadence (every 3 weeks vs every 5 weeks). On price, ratings volume, 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.
DAH Solar holds the better App Store score, 4.7 against 2.7. Both are backed by a comparable volume of ratings — 3 and 3 respectively.
NEPViewer ships an update every 3 weeks, DAH Solar every 5 weeks. The most recent releases landed on September 22, 2026 and September 16, 2026 respectively.
| Parameter | NEPViewer | DAH Solar |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) | 4.7 (3 ratings) — better |
| Positive reviews | 14.3% of reviews | — |
| Number of ratings | 3 | 3 |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 62 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Northern Electric & Power Inc | Anhui Daheng New Energy Technology Co. LTD |
Customer experience
NEPViewer
DAH Solar
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
DAH Solar
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NEPViewer
No in-app purchases
DAH Solar
No in-app purchases
