Off-grid PV

Monitoring my off-grid photovoltaic system

The aim of this project is to measure current and voltage of a 700 Wp solar panel continously. The technical structure is shown below:

Sensors:

For measuring current and voltage, different sensors and microcontrollers are used:

- ACS758 -> current measurement

- ADS1115 -> external ADC to measure output voltage of ACS758

- ESP32-> internal ADC to measure voltage of batteries via voltage dividers

Infrastructure:

The data is stored in a MongoDB database by using AWS and a Raspberry Pi as "database pipeline". Finally, the data is callable from the database via a Python script. The whole infrastructure of this concept can be seen here: