Possible Solutions for Grid Tied Solar Inverter Alternate Energy Input


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What solutions are there to feeding a high DC voltage rated (eg 1000VDC) certified grid tied solar inverter such as a Yaskawa Solectria PVI23-480. from an alternate DC+ bus supply.

Instead of 670 VDC input from a solar string, the project would involve a 6 pulse rectifier (possibly from a multi kilowatt VFD connected to a 480VAC synchronous gen set) which would in effect supply the DC+ requirement of the grid tied solar inverter.

Whilst extremely straight forward... how would the lack of current control into the grid tied converter be handled?

Suggestions and comments deeply appreciated.