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Hello All

I have a dedicated solar load panel that I sized and installed 6 years ago. It is a 200A panel and currently only has 2x 60A breakers to support 2-10kw inverters. I sized it in anticipation of installing up to 30kw and the conductors were sized for that as well. The solar panels and this load center were installed on a metal building not connected to the residence. There is a 2nd metal building nearby that I would like to install a 100A sub panel into to supply power to that building for the first time.

My question is if it’s allowable to install the 100A breaker feeding the subpanel in the dedicated renewable energy load center? The first metal building has another 200A panel with a separate meter but I would like to tap into the unused power from the solar panels if reasonable. I am aware of the 120 rule but I am not sure how it applies in the scenario.

Thank you for any feedback you are willing to provide.
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