Plug and play industrial grade cellular modem with five-year data plan (expandable to 12 years) for systems up to 60 microinverters (expandable). Available in the US, Canada, Mexico, Puerto Rico, and the US Virgin Islands, where there is adequate cellular service in the installation area. • LTE-M coverage • 5-year pre-paid AT&T data plan • 5-year equipment warranty • Up to 60 microinverters • Requires Envoy software 4.10.XX or later