Meet the Victron Energy SmartSolar Charge Controller: an app connected Bluetooth solar charge controller (100V 20amp) that monitors the voltage and current output of your solar panels to make sure you get more out of them. It maximizes solar energy harvest and can work with a battery voltage of 0 volts.
The device has Bluetooth, so you can control it with VictronConnect app. This app gives you a live status update on your panels. It can also help you find issues with your installation.[where to find it]