On my schematics, the only visible difference between the 2000i and the 2000iC is the output receptacles. On the 2000i the output of the inverter is wired to the 15A receptacle through a circuit breaker. On the 2000iC, the output of the inverter is wired to a 20A receptacle through a circuit breaker. In addition to the 20A receptacle there is a 30A receptacle that is wired directly to the inverter, but to the same place on the inverter that the 20A receptacle is wired to. On both generators the parallel cable jacks are wired direct to the inverter. Neglecting the circuit breaker, with the paralleling cable installed, both inverter outputs are connected to the 2000i 15A receptacles and the 2000iC 20A and 30A receptacles. If there is any load sharing control, it must be in the inverters because the output of the inverters is the only place the two generators are connected. I have no idea why the 2000iC has a 20A receptacle and the 2000i has a dual 15A receptacle because the output specs for both generators are the same.
I have no idea what this means when a 2000 and a 1000 are connected together. Since there is a sensing mechanism that controls engine speed based on inverter load it could be that the 1000 and 2000 would ramp up equally until the 1000 ran out of headroom. As load increases from that point, the 1000 could remain at full output while the 2000 increased from half to full. But it would all depend on the design of the motor control and only Honda knows how that works.
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