We have a WB US7000 that we would like to use as a Sunny Boy. It's obvious from the labeling that the inverter originally started as a Sunny Boy and SMA "converted" it and placed some additional labels on the inverter to make it a Windy Boy. What is required to change it back? I know the GFDI fuse needs to be installed so the GFDI is enabled. Will the Windy Boy set up tool allow me to go back to a Sunny Boy default configuration or is there another SMA tool that will do this?
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13 years 5 months ago
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From Microcogen.info:____________
All the SMA inverters have the full suite of firmware installed into EPROM at time of manufacture. When the inverter is shipped from the factory, generic settings are dialled in to select whether it is a “Sunny Boy” or a “Windy Boy” and the national standards for grid connection for the country it is being shipped to.
There are 3 levels of “administration”. The lowest level allows the conversion of a Sunny Boy to a Windy Boy or vice versa (as well as selection of constant voltage, constant current, or off grid if used with a Sunny Island).
The second level of administration allows changes to the grid connection parameters but in order to obtain this level of administration, you have to sign a disclaimer and agree to place certain stickers on the unit to show it has been altered from standard approvals.
The third level of administration is only available to SMA and this allows changing just about any parameter (such as serial number, etc) – but crucially, also allows them to interrogate the inverter to see if the base parameters have been exceeded (such as an over voltage condition).
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I’m actually going to be doing this exact same thing with three Windy Boys that only have seven hours on them a piece. And planning perspective, I’m curious do the Windy Boys still have the 4MPPT connection Points like the sunny boys do? Or do the Windy Boys no longer have MPPT‘s? I am also curious, do I still get four strings with the windy boy to Sunny boy conversion? Before y’all reply to this, I’m gonna dig into the owners manuals of both and see if I can find pictures of the DC input on those Windy Boys so that I have a better understanding of whatever your reply is going to be.