For the record the alternator does NOT "charge" the battery it only maintains the battery's charge. In the old days the alternator did charge the battery but these days it's not going to charge up a battery that is noticeably drained.
Get a battery tender and call it a day. In your case is there any chance you could just mount a retractable cord reel over where you park your Z? If so this solves the problem of having an extension cord draped across your garage.
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'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock
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