Sensors for monitoring power comsumption of 3 dc powerlines with arduino

Other Hardware Sensors
1

Hi

I'm looking for sensors to monitor voltage and amperes of three dc lines at the same time with an arduino.

Lines are

  1. 3-4 V, max 10 A
  2. 5 V, max 20 A
  3. 12-20 V, max 15 A

What sensors would be good for this project and is it possible to use 3 times the same sensor or should they be different sensors for different voltages?

Accuracy would be nice but in reality 1 % accuracy in this project is good enough.

In Arduino analog ports and so also I2C port are free as well as 6 of the digital ports. Other digital ports are allready occupied.

2

For voltage, the analog inputs are used, with a voltage divider for voltages higher than Arduino Vcc.

For current, these sensors are popular.