This is a DC to AC Inverter for a Solar Photovoltaic System (for use with solar panels). All the specs are available at this link: Fronius Primo 5.0-1 We have had a ground mount solar array for about 15 years. Two years ago the original Fronius Inverter was fried by a lightning strike. We were advised to replace the inverter rather than repair it. This inverter is two years old and has been replaced by a battery back up system which contains its own inverter. This inverter is only two years old. We paid $1900.00 for this and are willing to sell for $1200 or best offer.