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Old 07-13-2020, 05:57 PM   #1
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Inverter connections

Can two inverters be wired in parallel and will the larger wattage one "override" the lesser?
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Old 07-13-2020, 06:10 PM   #2
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I see no reason why not. Just make sure you’ve got the battery capacity. You might already have one for a refrigerator and want to add another one for a tv. People have done this.
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Old 07-13-2020, 07:30 PM   #3
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If the inverters are perfectly in phase you might get away with it. If slightly out of phase one or both might shut down, sensing an overload. If totally out of phase it will be like a dead short.

Two inverters in parallel on the input side, 12 Volt, are not an issue.
Like a famous character in the movies said. "Do you feel lucky".


There are several EE's here that might want to confirm this and perhaps elaborate.
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Old 07-13-2020, 07:33 PM   #4
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when you say in parallel i am assuming you are referring to the 12 volt cables in parallel. no way would i try to connect the 120 vac outputs. keep they seperate!
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Old 07-13-2020, 07:42 PM   #5
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If you are talking about connecting the 120VAC output in parallel. NO. I am not aware of any commercial rv inverter models that can sync the two outputs. 12VDC can be connected in parallel, but no AC without syncing the phases.
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Old 07-14-2020, 01:35 PM   #6
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What I did was to mount a 2200w below the 1000w inverter my Isata3 was equipped with. I used the 12v terminal on the 1000w due to convenience. I removed the 120v plug that only powers the outlet above the sink from the original 1000w to the output of the 2200w. Now when boondocking I can use my induction cooking surface to quickly heat water for coffee and and use my microwave.
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Old 07-14-2020, 07:05 PM   #7
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Ditto on what others have said. DC input side, you want a parallel connection. On the AC output side absolutely no way, you'll end up with at best a fried inverter or both and at worst a fire.
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