American company Outback is a manufacturer of OutBack inverters. It also makes various other renewable power systems such as batteries and solar chargers. These products are commonly used in the commercial, industrial, and residential markets. Outback also specializes in making solar products that are designed for off-grid use.
Site - https://outbackinverter.com

African Energy, a subsidiary of American Energy, distributes OutBack products in Nigeria. This company has an authorized sales agent who also covers Ghana and other African countries.

Unfortunately, some of Outback's products are not available in Nigeria due to the high cost of these products.