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Old 05-04-2017, 03:10 PM   #1
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Wiring inverter

So I would like to wire in an inverter and have my 120v outlets available when not running my generator. My question is simply do I connect the inverter to the batteries and connect my shore power cord with a 15 amp adapter to the inverter? Or is that crazy?
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Old 05-04-2017, 03:34 PM   #2
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No, using your words....that's crazy....unless you are really good at shutting everything off.

Start by describing how many watts your inverter can deliver. That will determine the amps it can power.

# watts / 120 = # AC amps

Many large inverter's are about 2K watts, which is about 17 amps.
And while delivering 17amps of 120vac output, it would be drawing more than 170 amps of 12vdc input. How big is your battery bank?

Don't know your coach specifics, but if it is a 50amp shorepower then that is the equivalent of 100 amps of 120vac (50 amps x 2 legs).
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Old 05-04-2017, 03:57 PM   #3
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Quote:
Originally Posted by Bounder Rob View Post
So I would like to wire in an inverter and have my 120v outlets available when not running my generator. My question is simply do I connect the inverter to the batteries and connect my shore power cord with a 15 amp adapter to the inverter? Or is that crazy?
You are describing a whole house inverter connect. It's very doable. However you must ensure power management. Refrigerator set to propane, do not turn on air conditioner, etc. My previous coach was setup thus way - a 2300 watt inverter that the shore power cord was simply plugged into.

A biggie is that such a connection will create a charging loop - the inverter is drawing power from the batteries and in turn the converter is charging the batteries. This will quickly deplete the batteries. Somehow you need to disable the converter when the inverter is active. I did this via a on/off switch inserted in line to the power cord of the deck type converter. The converter was located under the refrigerator so I used a wirelessly controlled switch. Worked great.
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Old 05-04-2017, 04:35 PM   #4
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When I installed my inverter, I found the romex wires FROM the circuit breaker, that feeds many of the outlets.

I cut it and wired in a transfer switch designed for inverters.

Now when power is lost, the switch transfers to the waiting inverter.

No switching off the fridge, water heater, ACs, converters or microwave.

The TV, Sat. dish, sound bar, and phone chargers all stay on. The coffee maker, mixer and bath room appliances all work, when needed.

We had a power failure last night. We knew because the microwave timer shut off, while we were watching TV. The fridge went to gas and we didn't even need to get up.
It came back on 15 minutes latter. We heard the micro beep.

If I get a residental fridge, it will be wired in also.
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Old 05-04-2017, 04:54 PM   #5
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sounds like what you are describing is plugging your coach into it's own inverter via the inverter's own 120v outlet... don't see why that wouldn't work - many of us do the same when we adjust down our 50a power cord to a 120v adapter and use an outside 120v outlet...

the comments on 'making sure you are aware of your power usage' are true, but it sounds like you already know what exactly you're using it for specifically ... plus, the inverter should have it's own breaker or fuse in the event you ask for more power than it is designed for...
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