Does bigger always mean better and cheaper when it comes to inverters?

A PV project always begins with system design. During this process, the planner takes a series of technical decisions, both general and relating specifically to the system components. CAPEX (capital expenditure) plays a key role here. CAPEX for a PV system includes the costs for inverters, PV modules, labour and BOS (Balance of System) costs etc. Here, the inverter usually makes up less than 10% of the CAPEX, but, nonetheless, does have a significant influence on the operating costs and the ROI of the PV system.