Comparison

Overkill Solar vs EG4 BMS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

EG4 BMS

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The EG4 BMS App is an application designed for battery management, suitable for both household and industrial power management, storage, and related functions. Compatible with EG4's 314Ah WallMount battery series

Screenshots

Overkill Solar4 screens
EG4 BMS3 screens

Verdict

The call

The clearest difference is update cadence: EG4 BMS at every 3 days against Overkill Solar's every 4 months. EG4 BMS also leads on iOS requirement (11.0 vs 13.4). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Overkill Solar ships an update every 4 months, EG4 BMS every 3 days. The most recent releases landed on August 18, 2026 and September 5, 2026 respectively.

Scorecard2 real differences · 8 level
Overkill Solar versus EG4 BMS: the parameters behind the verdict, then further details
ParameterOverkill SolarEG4 BMS
PriceFreeFree
Rating4.7 (16 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings16 — better—
Update frequencyEvery 4 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.411.0 — better
Further details — not scored
Size21 MB44 MB
Age rating4+4+
DeveloperOverkill Solar LLCeg4

In-app purchases

None

Overkill Solar

No in-app purchases

None

EG4 BMS

No in-app purchases

Questions

Is Overkill Solar free?
Overkill Solar is free to download, with no in-app purchases.
Is EG4 BMS free?
EG4 BMS is free to download, with no in-app purchases.
Do Overkill Solar or EG4 BMS have ads?
Neither Overkill Solar nor EG4 BMS shows ads.
Which is updated more often, Overkill Solar or EG4 BMS?
Overkill Solar ships an update every 4 months, and EG4 BMS every 3 days. Most recently, Overkill Solar was updated on August 18, 2026 and EG4 BMS on September 5, 2026.

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