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From a connection standpoint, what is the difference?
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AC coupling, as I understand it, is using a inverter to backfeed the AC of another inverter to force charge the batteries. The driving inverter has no idea what the battery state of charge is, it just keeps dumping power into the faux Grid. Without balanced precautions, this can be an expensive learning lesson.
Stacking is paralleling the outputs to handle larger loads.Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister -
Two completely different things.
AC coupling is the use of grid tie inverters to generate AC power, which is fed to a hybrid inverter and allows either battery charging (during outages) or backfeeding the grid (during normal operation.) Occasionally this is also used for zero-export. It is difficult to do well.
Stacking is the use of several inverters, usually with a special synchronization cable, to allow more current/voltage at the output of the inverter system. Parallel stacking generally refers to increased current rather than increased voltage.
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AC coupled = 2 inverters connected in parallel at each respective line out
(Mod note - Incorrect) Presenting an answer to a question, that you don't really know, is bad form.
You can add water to your brakes, if the brake fluid is low, but long term it's going to end poorly.
Giving bad/dangerous advice on a subject you are not qualified to advise on, is wrong.
Parallel stacked = 2 inverters connected in parallel at each respective line out
Close enough to be ok.
if you answered " I think it's blah blah blah......" that will fly, and we will correct you. A dangerously incorrect statement gets public humiliation.
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