The optimal solar panel tilt angle equals your latitude, facing true south (Northern Hemisphere) or true north (Southern Hemisphere). At 40° latitude (New York), set panels to 40° tilt.
The top ten scoring inverter manufacturers were listed as follows: China-based APSystems (Yuneng Technology) and Sinexcel, followed by Ireland-based Eaton, then China's Kstar Science and Technology, Hoymiles Power, followed by Taiwan-based Delta Electronics, Switzerland-based.