Vietnam Solar Photovoltaic Equipment Market By DC Voltage Type (400V, 600V, 1000V & 1500V), By Installation Mode (Ground Mounted and Rooftop), By End User (Industrial, Commercial and Residential), By Module Type (Monocrystalline, Polycrystalline and Thin Film), By Type (Circuit Configuration, Module Mounting Systems, Solar Charge Controllers and Others), Competition, Forecast & Opportunities, 2018