Some thing here about the products in general.
Something that explains why you should purchase them and how you can do so.
Elpower inverters are made for small wind turbines, mini hydro plants and cogeneration plants; CLEANVERTER is the most comprehensive and solid type of inverter designed for this application.
Inverters for photovoltaic systems. CLEANVERTER PV is a series of inverters designed to manage high-voltage strings due to a transformer on the grid side with a grounded negative pole, as required by the latest generation thin film panels.
Something here about VRB batteries.