With the Zareba 10 Mile Solar Low Impedance Fence Charger, your fence can be powered from anywhere, even the most remote fields. This fence charger runs up to 2 weeks without sunlight and is powered by an internal rechargeable battery. With 0.15 output joules, this energizer will support animals and livestock such as cattle, horses, bulls, and goats. If using poly products, you should expect about half of the power from the energizer. The more material along the fence line, the harder the energizer must work to pass voltage through the line. A well-kept fence line will provide optimal voltage from the energizer along the fence. To prepare the 10 Mile Solar Charger for first use, place it in full sun for 3 days in the off position. After this time has passed, the unit is ready to use and install. Set the charger's built-in mounting bracket onto a T-post, Y-post, or round-wood post. The durable case will protect the energizer through various weather conditions. This charger is tested with a full load at our manufacturing facility and comes with a 1-Year Limited Warranty including damage from lightning.