... .- Energy saving, environmental-friendly.- Advanced technology, strict quality control system.- Easy installation, safe operation, free maintenance.- NO MOQ, fast ... grid tie inverter ,(if want also use off grid system ,must be connect battery) Good quality, best price and better technical ... : 4KW Suitable for daily power consumption : <16KWHSolar panel connect way:4 pcs in series ,and 5 sets in parallel ...