Reliable All-Season Power for Small to Medium Pastures — Gallagher M800 EnergizerThe Gallagher M800 is a customer favorite for good reason — it delivers more punch than entry-level energizers with 8 stored joules and 4.9 output joules, powering up to 90 miles of clean fence across up to 520 acres. It's the dependable all-season workhorse for operations that need reliable livestock control without stepping up to a commercial-grade unit.Built with a tough outer casing, integrated lightning protection, and simple plug-and-play installation, the M800 is designed to be set up and forgotten — running season after season without fuss.Specifications Stored Joules: 8.0 J Output Joules: 4.9 J Typical Fence Distance: 30 miles Clean Wire Fence Distance: 90 miles Property Size: Up to 520 acres Power Source: Mains / 110V Lightning Protection: Integrated Dimensions: 9"W x 7.5"H x 4"D The all-season classic — the Gallagher M800 delivers dependable, powerful fence performance for small to medium pastures year after year. Compare across the full lineup: See all electric fence energizers we carry — Speedrite, Gallagher, Cyclops, and Patriot — sized 0.12 to 86 joules. Need help sizing? Use our free electric fence charger sizing calculator or call 888-251-3934.
