The X-Stop SOLAR0040 is a fantastic standalone solar powered electric fence energiser with a power rating of 0.04 joules, meaning it can power 1-2 km of galvanised wire. This makes it a perfect hands-off energiser for small to medium setups, from small garden pens to paddocks. Make sure the line is clear from vegetation for the best performance. It has high quality construction featuring advanced MOSFET technology, designed to last a lifetime. The SOLAR0040 is a well established and high quality energiser with thousands of units sold. It is proven to be a reliable and effective energiser for the best possible price. With 1 year’s warranty and UK based support, you can buy with confidence. It provides reliable, low-maintenance power for long-term fence set-ups, but is small and light enough to move around on temporary set-ups.