DC Current / Voltage / Power Monitor

Hi All

Our project is to use an arduino uno to monitor the voltage and current from a two panel photovoltaic system. The panels are charging a bank of batteries, which are then being used for domestic lighting.

Just looking for help on using the arduino to monitor the DC voltage and current, then multiply to obtain the power value.

Already worked out using a closed loop hall effect device to obtain the DC current. Just need ideas on voltage and how to input these values safely into the arduino

Cheers

Tom

Just need ideas on voltage and how to input these values safely into the arduino

Normally through a potential divider to an analogue pin if the voltage is over 5V.

How many volts and amps you talking about from a two panel photovoltaic system?

From two panels in series i think higher end of the voltage is 100v approximately, when the sun is strong. At the moment, not sure on the current as not sure what the demand is from the battery bank.

You will need to know the complete range of voltages and currents involved before you can design a circuit that will allow an Arduino to safely monitor either. A multimeter will be essential.