My project of heating water using photovoltaics is not dead.
Everything works fine but I have one uncertainty.
In the acs713 directory are written different voltages and I do not know what real maximum voltage can measure this circuit?
I have three different values in the datasheet and I do not know what they mean because I'm not english, please explain it to me 
Patryk20:
I do not know what real maximum voltage can measure this circuit?
You're looking in the wrong place in that datasheet, which is why you got confused.
I'm attaching new screenshots which will help you.
My guesses are:
Dielectric strength test voltage is a voltage level they use to test the insulation (perhaps only
samples of the device). This is briefly applied I suspect.
Working voltage is a value they recommend should work reliably (in the laboratory).
Working voltage for reinforced isolation is a value that is more conservative, allowing
for more real-work voltage spikes and so forth.
This is all about the isolation between the current terminals and the hall sensor terminals, there is no
measurement of voltage involved.
In my circuit, the absolute maximum voltage will be 280V DC and normally 220V. So hard to say whether it will be good because these values ​​are between given. I certainly will not have any spikes in the voltage. I would not like to break the high voltage on arduino it would destroy absolutely every element of my circuit.
Wait, you want to know the voltage this sensors returns to the micro controller OR the voltage of the mains supply the sensor can work with?
My guess based on your datashet is -
This sensor will return about a maximum of 8 Volts to to your Arduino when it senses current.
This sensor can sense current in a a mains voltage supply of maximum 354 Volts.