The JVA SV2 is a solar-powered electric fence Energizer. The JVA SV2 is ready to go straight out of the box. The SV2 is the perfect portable electric fence power solution. Its integrated design makes it ideal for strip grazing, no need to lug or replace flat batteries. The solar panel on the SV2 charges the inbuilt battery and the Energizer runs off the battery. The SV2 also packs enough punch to be great in small permanent electric fence setups.