OCPD on Combiner Output
For a grid tied system with battery backup, is over-current protection required immediately following the combiner? I can't get DC backfed from the inverter because it can't do that. However, I don't know about the batteries back feeding through the charge controller. I read NEC 2008 690.9 and I can't get a clear answer to my question. Can anyone provide a clear answer?
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