Battery Level V to mA custom request from US Customer

do you support 0-30V ? to 4-20 mA output,or only 24V input ?

0-30VDC to 4-20 mA and 0-24V to 4-20mA .   we Eletechsup can custom for you 

we do 2 input and 2 outputs .

it is  ok to add RS485 as well.. so 0-30V to MODBUS RS485.