BAT vs Overkill Solar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BAT
Monitor your smart Bluetooth lithium batteries wirelessly from your phone. Track key metrics like state of charge, voltage, current, and temperature. Connect to multiple batteries simultaneously and view their data.
- Wireless Bluetooth connection
- Track cycle life
- Display SOC, voltage, current
- Monitor cell voltage and temperature
- Connect to multiple batteries
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This application is only suitable for Smart Bluetooth lithium battery. FEATURES 1. No need for a separate battery monitor. 2. Wirelessly connect to each battery from your phone. 3. Track Cycle Life on each battery. 4. Display SOC, voltage, charge and discharge current, cycle life, cell voltage and temperature. 5. The phone requires bluetooth5.0 with bluetooth low energy functions. 6. Operating distance: less than or equal to 15 meters 7. The APP can connect multiple batteries at a time, and the data of another battery can be viewed by switching between left and right pages. 8. If you want to connect this battery with another mobile phone,pls exit this app program from the first mobile phone.
Overkill Solar
This app connects to a solar battery management system to provide detailed monitoring and control. Users can track cell voltage, capacity, current, and manage charging/discharging ports. It also offers advanced configuration options for calibration, balancing, and protection settings.
- Monitor cell voltage and capacity
- Control charging and discharging ports
- Calibrate voltage and current
- Configure balancer and protection values
- Log voltage, current, and power
- Monitor BMS alarms and temperature
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Overkill Solar iOS App allows users to connect with the Overkill Solar Battery Management System (BMS). It can monitor voltage of the cells, total capacity, charging and discharging current, and switch the charging and discharging ports on or off. Features: - change bluetooth advertising name - unlock hardware protected BMS - save or load BMS configurations - calibrate cells voltage and charging or discharging current - log maximum or minimum voltage, current and power - enable and configure the balancer - modify the capacity settings - monitor temperature - monitor BMS alarms - import and export .fig files - set level 2 and 3 advanced protection values
Screenshots
Verdict
The clearest difference is review sentiment: Overkill Solar at 100% against BAT's 24%. Overkill Solar also leads on rating (4.7 vs 3.2). BAT's advantage is update cadence (every 3 weeks vs every 4 months) and ratings volume (61 vs 16). 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.
Overkill Solar holds the better App Store score, 4.7 against 3.2. Both are backed by a comparable volume of ratings — 61 and 16 respectively. Written reviews point the same way: 24% of BAT's written reviews are positive against 100% of Overkill Solar's.
BAT ships an update every 3 weeks, Overkill Solar every 4 months. The most recent releases landed on September 9, 2026 and August 18, 2026 respectively.
| Parameter | BAT | Overkill Solar |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (61 ratings) | 4.7 (16 ratings) — better |
| Positive reviews | 24.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 61 — better | 16 |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 9 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Grenergy Technology Co.,Ltd. | Overkill Solar LLC |
Customer experience
BAT
Overkill Solar
In-app purchases
BAT
No in-app purchases
Overkill Solar
No in-app purchases
