Invert electric fence supply

[rawhiri]

We are looking to utilise our mains fence energiser to charge a 12 volt battery, located about 5 km along the electrified fence.
Is it possible to invert the pulse from the fence to charge the battery?

cheers

 

[Boncuk]

Depending on the method used the fence might have HV-pulses of 10 - 20KV.

Producing those pulses alraedy involves losses. The pulse current is somewhere in the mA-range.

Reconverting the HV-pulses to 12VDC involves losses again.

I suggest to use a battery charger connected to mains.

Boncuk

 

[SPDCHK]

We are looking to utilise our mains fence energiser to charge a 12 volt battery, located about 5 km along the electrified fence.
Is it possible to invert the pulse from the fence to charge the battery?

cheers

I seriously doubt it.

Remember, electric fence energizers are designed to run of a battery and to use this battery very efficient. (read this and this for more information), but in short, Power out = Power In – losses. These units consume between 2 – 20 watts of power, (continuous). A pulsed voltage signal is difficult to use as a source of power. You will need some serious electronics converting the pulsed high voltage signal into usable power to charge batteries with.

 

[rawhiri]

Thanks for comment.
We have the elec fence already out that part of farm, and the closest mains supply is back at energiser.
We hoping there is a solution to provide some battery charging ability at the remote location without going to added hardware of solar etc.

 

[rawhiri]

What is the result if we wrap a coil around the single electric fence wire, will a current be generated by EMF?
The fence runs 24/7 and the battery will only require intermittent loading.

thanks

 

[SPDCHK]

Forget using the fence as a means of power supply!

Unless you want to charge a wrist watch battery, that might work, but there's just not enough continuous power to fulfill your need.

You have no choice but to find an alternative power source. Solar or wind power.