What to use to know Voltage of Batteries from Solar System

[jnevestdl 1]

Hi!

I've got a Solar System at home that works at 24V... So I need a sensor that can read from 20V to 30V. What can I use? A universal sensor? And how to do that?

Best Regards,

Joao

[UrSv 6]

Hi, a voltage divider network in front of an RGBW-controller will be able to do that by using it as input and dividing the maximum read voltage by a factor of (at least) 3 and then setting appropriate start and stop values for the input translation. In this case I would divide by say 4 for easy numbers by using say one 1 kOhm resistor and one 3 kOhm (or 3.3 kOhm if a 3 kOhm is hard to get) and then set the lower limit as start 0/display 0 and the upper limit as end 10/display 40 with unit V for a sensor of type "Other". You can calibrate the values once the divider network is in place and it works by measuring the actual values and adjusting accordingly.

[jnevestdl 1]

Thank you for the reply... Can you please make me a diagram with that you are explaining.

Thank you very much!

[UrSv 6]

Something like this (the temperature, humidity and light sensors obviously don't have anything to do with your stuff. They were in the picture I borrowed from the RGBW manual):

Please login or register to see this attachment.

Please login or register to see this attachment.

[jnevestdl 1]

Thank you!

Now I'm waiting for the RGBW Module. When it will arrive I will test and send feedback to you!

Cheers