The OutBack FX is designed to survive harsh environments anywhere in the world. Our unique sealed, gasketed die-cast aluminum chassis protects and keeps the power conversion components cool - without requiring outside air to be blown through the sensitive electronics. This reduces the major causes of inverter failure - corrosion, dust, insect and animal damage. The FX can be used in high ambient applications up to 60°C with reduced output ratings. A "Turbo" option is available with FX inverters. This consists of an external cooling fan and baffles to enhance operation in hot conditions. The new VFX Series with internal ventilation will function even better in hot conditions.