Felix Solar PV Log

Felix The Puddy Tat

About this app

Felix Solar Log

Bluetooth Inverter Connection and Data Logging application for your solar photovoltaic system.

Supports SMA* Sunny Boy Bluetooth wireless enabled solar PV Inverters.

Note: please check with your installer they have set the Bluetooth ID and date/time of your inverter.


Supports multiple inverter logging (can only connect/view one at a time).

Daily graph updated whilst connected to the inverter.
Swipe gesture support on graph to move between days.
Download Historic data for date range (inverter holds last 90 days).


Provides real time spot values for performance monitoring.

Power (W)
Today (kWh)
Total (kWh)
Today Feed in + Export Income
Today estimated cash savings on electicity
Total Income (Feed in + savings)

Upload Collected data to pvoutput.org** for further online analysis.
Option to real time auto upload to pvoutput.org whilst connected. NEW!

Historical daily totals (kWh) data viewing by scrollable bar chart.
Historical weekly totals (kWh) data viewing by scrollable bar chart.
Historical monthly totals (kwh) bar graph with ability to show comparison to monthly targets.

Plant View aggregate Historic daily totals (kWh) data viewing by scrollable bar chart for all inverters registered.

Plant View aggregate Historic weekly totals (kWh) data viewing by scrollable bar chart for all inverters registered.

Plant View aggregate Historical monthly totals (kwh) bar graph with ability to show comparison to monthly targets. for all inverters registered.

Database tidy function.
Database backup/restore, transfer your data to your new android device
Optional auto backup to "/sdcard/Felix Solar Log/Backup" each time you start the app.
Copy your backup into "/sdcard/Felix Solar Log/Restore" to auto restore when you next start the app.

CSV Import function, Import your Sunny Explorer CSV Files.
Format1: dd-MM-yyyy HH:mm:ss;kWh;kW
Format2: dd/MM/yyyy HH:mm:ss;kWh;kW
Format3: dd.MM.yyyy HH:mm:ss;kWh;kW

Multi file bulk CSV Import functionality, place files in "/sdcard/Felix Solar Log/Import"


*Tested on SMA Sunnyboy SB4000TL, STP8000TL, SB2000HF, SB3000HF Models
**requires free pvoutput.org account and api key, pvoutput.org will only accept uploads within the last 14 days.

Thanks to Jakob, Roberto & Guenter for their translation

Ratings and reviews

great work on 31 Aug 26 version.. Ported well and seamlessly resumed logging. thanks

I have downloaded so many apps to read my inverter units that have been useless. I finally decided to pay for this one. It's great. It's easy. And it works. I can see my output from my Samsung Galaxy 10 minutes away. Love it. thanking you!!! And again, when I had issues with my Inverter date, Steve was fantastic. You will love this App!

Great app for those with older SMA inverters that don't feature Wi-Fi as standard - a steadily declining user base. Using an old phone (Samsung Galaxy S20) with a Bluetooth connection to the inverter, this is basically set and forget. Get this app while you can.

What’s new

This is a major update: the entire app has been rebuilt from the ground up with a modernized, more reliable foundation — updated for current Android versions, improved permissions and background reliability, stronger security, and a cleaner codebase throughout. Your core inverter logging experience remains exactly as you know it, now running on a much more solid and future-proof base. Thank you for your continued support!