An energiser is a heart for every electric fence. It is the main supplier of current to the entire fence. The voltage in the electric fence is equal to the voltage of the energiser. They are mainly of two types one is battery energisers and the other are mains energisers. Each of these power suppliers has their own advantages and disadvantages. A farm keeper needs to consider other factors before really picking a fence energiser. A battery one is a portable one and supplies current which is a bit lower when compared with the mains one. The advantages of the battery one are it can be used to temporary fencing which needs regular shifting. There are best suited for strip grazing electric fences. 

The mains energisers are used to permanent electric fencing which need constant supply of current. They are also useful high voltage electric fencing like the ones used to fence the cattle and horse electric tape. But not just an energiser makes a difference there a lot of other factors to be considered a high voltage energiser requires high tension electric polytape to withstand high voltages. The posts that are used to support the fence should also be capable enough to withstand high voltages and as the high tension electric fence, weights higher than normal electric fence. And after finalizing all these factors we must decide the best electric fence for our farms. You can also go through electric farm fencing kits which are available in varies price and quality ranges.