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I am going to buy 3 panels, and need to make a decision: do I buy the higher spec panels which can only be connected in parallel? Or do I buy slightly smaller panels that allow me either series or parallel configuration, with the bonus of a higher voltage reading (when connected in series)...

Hi I have one of these hybrid MMP inverters (see specs below), which I intend to use in an outbuilding that has also access to grid electricity (AC Input). I have seen a few install videos on you tube (including Will Prowse's) and all of them use (half) an extension cord to connect directly into...