[RE-wrenches] AC Coupling

[William Miller]

Friends:



I am starting to get the impression that there is a diversion on the
understanding of the definition of AC coupling within the industry.  I
think this definition needs to be clarified.



Below is a diagram of what I understand is a DC coupled system (I hope
these diagrams come through):





A battery inverter that receives AC power into an AC input port is *not* AC
coupled.



Here is an AC-coupled system:





What makes AC-Coupled systems unique are the problems presented by sending
power *backwards* through a battery inverter.  This is not how battery
inverters were originally designed to operate.  These systems require
careful consideration to avoid battery overcharging.



Do we have consensus on this definition?



William Miller



Miller Solar

17395 Oak Road, Atascadero, CA 93422

805-438-5600

www.millersolar.com

CA Lic. 773985
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