# NEPViewer vs DAH Solar

The clearest difference is rating: DAH Solar at 4.7 against NEPViewer's 2.3. 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.

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 2.3. Both are backed by a comparable volume of ratings — 4 and 3 respectively.

NEPViewer ships an update every 3 weeks, DAH Solar every 5 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | NEPViewer | DAH Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (4 ratings)](https://appshunter.io/ios/app/nepviewer/id1480269247/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/dah-solar/id6444245984/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 13.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 62 MB | 60 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Northern Electric & Power Inc](https://appshunter.io/developer/1202736933) | [Anhui Daheng New Energy Technology Co. LTD](https://appshunter.io/developer/1273605807) |

## What reviewers say

### NEPViewer

[App page](https://appshunter.io/ios/app/nepviewer/id1480269247)

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.

**Highlights:** Real-time system monitoring, Track energy harvest, View installed systems, Check system performance, Multi-language support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive and easy to use (some users)
- ✨ Modern look and feel (some users)
- ✅ App does what it's supposed to (sometimes)

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- App closes immediately on launch/login
- Blank error box when resetting password
- App offline frequently
- Inaccurate wattage readings
- Cannot connect to all inverters

**Requested features**

- Restore panel performance view
- Restore daily/hourly graphs and curves
- Improve iPad/landscape mode support
- Better customer support
- Option to stay logged in


### DAH Solar

[App page](https://appshunter.io/ios/app/dah-solar/id6444245984)

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.

**Highlights:** Real-time power plant monitoring, Smart analysis of performance data, Operational status tracking, Photovoltaic system management, Intelligent power plant dynamics

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NEPViewer free?

NEPViewer is free to download, with no in-app purchases.

### Is DAH Solar free?

DAH Solar is free to download, with no in-app purchases.

### Which has better reviews, NEPViewer or DAH Solar?

DAH Solar is rated higher. NEPViewer averages 2.3 out of 5 from 4 ratings, while DAH Solar averages 4.7 from 3 ratings.

### Do NEPViewer or DAH Solar have ads?

Neither NEPViewer nor DAH Solar shows ads.

### Which is updated more often, NEPViewer or DAH Solar?

NEPViewer ships an update every 3 weeks, and DAH Solar every 5 weeks. Most recently, NEPViewer was updated on October 24, 2026 and DAH Solar on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*