not sure but during day i:m not alone (only evening/night time) and considering how many times i got zapped on the darn things myself... imagine going outside @nite to take a leak and hitting the fence...i have no experience of deterring boar so just a suggestion (possibly a useless one, experienced folk may correct me), would an electric fence work ?, apparently some people use an electric fence to deter bears so it may work on boar?