During the non-isolated/transformerless inverters in parallel, there is a direct coupling relationship between the inverter circuits, and distributed parameter impedance inside transmission lines.
Recently, we shipped 100pcs 5kw on-Grid solar inverters to Americas for L-L 220Vac Grid connections! With years sampling,testing and help from Brazil/Mexico/Chile/Peru customers, we solved problems caused by differences between Americas L-L power Grid and L-N 220Vac electricity Grid, for long time stable high-efficient Grid-connection working!
As well as some 1phase 120Vac 2KW-4KW&3phase 240Vac 10KW-30KW inverters.
Our MPPT Solar charge controllers 20A12Vdc to 65A 96Vdc were installed in 2016 early at several Indian Ocean islands around Réunion for stand-alone solar power systems, bearing ocean corrective winds and moisture, But running 1.5Year until now without any fault!
And half year before, we upgraded them to 3rd generation with outside-fuses/DC-loading/wider input voltage range/max efficiency!
Glad to visit SNEC PV expo as every year before, honorable to study there from China big brands of solar inverters, MPPT solar charge controller, solar pumping inverter, storage solar inverter etc. So many brands, so many solar products! But we have to say there is still no innovative and revolutionary solar product...