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Old 05-22-2020, 08:23 AM   #1
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A/C on 30 amps.

I have two Honda 2200i generators. Put in parallel they can output 4400 peak, 4000 steady power via a 30 amp outlet. Aside from my 13k btu unit in the living room of my 37' 2015 fifth wheel, we recently had a 12.5k btu unit installed for the bedroom.

Of course, the first time I plugged in the RV right off off, both of the A/C units can't work together!

Can a Softstart type device help, or is it too much to Hope that 4000 watts and 30 amps are not enough?
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Old 05-22-2020, 08:43 AM   #2
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OK,
see my pic..

Soft starts on both may help but you will be pulling 2400-2600 wats on both and the start surges are going to be marginal on a hot day.. especially if ANY thing else is on in RV.. Battery charger can add 200-300 watts, TV another 100...
those honda lose some watts twined up..

is wiring also on separate circuits.. just to not overload the wiring..
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Old 05-22-2020, 10:13 AM   #3
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I was able to run my 13.5 AC on a single Eu2000i with soft start as long as the batteries were already full. As soon as the converter or electric hot water kicked on it was game over.

Is your 30A enough to run both on shore power? Seems like most manufacturers require a 50A upgrade for a second AC
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Old 05-22-2020, 01:46 PM   #4
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If you're going to be in a RV park they normally don't allow generators running all day and some forest service-type campground have limited generator hours.
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Old 05-22-2020, 03:48 PM   #5
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Just a point of information, 30amps is 3600 watts.

You can't get 4000 watts, past the main breaker, even with 5000 watts of generators.
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Old 05-22-2020, 03:54 PM   #6
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The 13k unit will draw ~3800 W and the 12.5k will draw ~3660 W. Nobody that is boondocking will complain about a generator.
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Old 05-22-2020, 03:56 PM   #7
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To find out you need to know what the power requirements are for every device you are using. My progressive EMS monitored power usage with an inside remote panel so I could see exactly what the start and the run amps were for everything I turned on. I could run both a/c units on 30 amp shore power if everything else including the converter was turned off. If they both happened to start the compressor at the same time though it world trip. I did not have soft start. With the 2 15k's in the bus I have now I wouldn't even bother trying.
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Old 05-22-2020, 04:01 PM   #8
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Quote:
Originally Posted by Mtn. Lion View Post
The 13k unit will draw ~3800 W and the 12.5k will draw ~3660 W. Nobody that is boondocking will complain about a generator.
13.5k is more like 1800 at startup and 1500 when running. 3800 watts is approx 30.5 amps and would trip the breaker.
a 12.5k should be around 1500 start and 1200 run.
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Old 05-22-2020, 04:15 PM   #9
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It sounds like BTU to watt calculators aren't very accurate. Or I did it wrong, or both
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Old 05-22-2020, 05:02 PM   #10
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Fridge on propane or off, inverter/charger or converter off and easy starts, and you should be fine. When I had only easy start, would join fwd and after ducts and set not easy start ac on 65, and soft start unit at 75. That way easy start unit would cycle on and off and bedroom unit would run continuosly.
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Old 05-22-2020, 06:07 PM   #11
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Quote:
Originally Posted by Copp View Post
I have two Honda 2200i generators. Put in parallel they can output 4400 peak, 4000 steady power via a 30 amp outlet. Aside from my 13k btu unit in the living room of my 37' 2015 fifth wheel, we recently had a 12.5k btu unit installed for the bedroom.

Of course, the first time I plugged in the RV right off off, both of the A/C units can't work together!

Can a Softstart type device help, or is it too much to Hope that 4000 watts and 30 amps are not enough?
Yes a softstart could help, but given the concern or question why spend all the money on two Honda's? Just go buy a single generator that can do the job, they are .25 cents on the dollar at harbor freight. The more you use a generator the better it is, if you don't need new generator that much then 2 Hondas should be fine to run one AC whenever you like. I can actually run 2 13.5 btus on a 20 amp breaker most of the time (nothing else), but not when the coach requires both to start at the exact same time. Try turning one one and allowing some cooling. Then turn the other on. If you need both ACs on full blast on regular basis, you are wasting time, go get a 5500 plus generator. Sell the two Honda and actually make some money.

FWIW, I have 50 amp service on my coach, I frequently connect to 20amp, 30 amp and 50 amp services. Not a big deal like I thought it might be except for maybe July & Aug.
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Old 05-23-2020, 05:44 AM   #12
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Just a observation.. Some RV do not have a main breaker in the panle,, just branch breakers,,, the main power protection is help at generator, RV park plug, inverter itself..

My winnie has no main, but genny has a 30 amp trip.. I just tested my genny for giggles, I put a heater on 1250 watts,, verified by my watt minder.. fired up the RV AC 15k.. genny bunkered down shook and recovered.. 2580-2870 watts at 116V 3460RPM....

Tried it again with shore power, into a 20 amp garage plug, tripped..
moved it to my 30amp welder circuit .. but used a cheater cord to adapt.. I ran both for 35 min or so, AC cycled compressor.. Converter turned on added 210 watts,,
Held.. cheater cord got warm as it is 12 guage,,

Point is a 4500 watt surge, 3600 run genny and some hard or soft starts can run 2 AC.. even the older 15k.. my AC has a hard start..

BUT if your RV need to have 2 AC wired on seperate branches and you still have a 30AMP limit on wiring..etc..
Some RVs can be easily jumped to 50A if a good electrical guy does it, others that use newer monitor systems can be a tough refit..
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Old 05-23-2020, 08:37 AM   #13
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I do have a 50 amp service. And I misspoke, they are 15k and 13,5k units.

Trying to save money, am considering ONE softstart on 15k unit. I would spin up the 13.5btu unit, then softstart the 15k. I know I can run either unit with the two Hondas. I am going to experiment today turning stuff off and seeing if one unit can do anything with the 20amp outlet converted with a 20 to 30 amp dogbone plug.

We live in Tampa. Florida in summer can be challenging to say the least. I would have gone with a bigger, lesser quality inverter generator, but:
1. One Honda EU2200 was given to me as a retirement gift, meaning I could to 4400 peak watts for $1000 by getting a second one and a cable
2. They weigh 48 pounds! I am a big guy, but I am also 66 years old. I have trouble slinging 80-100 pound generators around.
3. They are Hondas! Never more than one pull!
4. Before I bought the Honda, I only had ONE A/C unit. Got a 13.5 btu unit installed for $550 tax, tag and title out the door. NOW I have many options to
consider.

In the end, I am just hopeful the 15k can keep the main area cooled and use the 13.5k for nighttime use. A friend says I will need both, come mid-summer in Florida. The problem is if we have someone besides the two of us staying in the unit.
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Old 05-23-2020, 09:25 AM   #14
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Someone mentioned that no one boondocking will complain about a generator. Maybe not, but I have done some grumbling about other boondockers who run loud generators day and night. Even if they are a quarter mile away, the noise echoes down the canyons. We have had to pack up and move away a couple of times. Not often, but not fun.

The silence is one of the main reasons I boondock. Please use your generator sparingly. Yes, I have a generator. I use it less than once a year (except for monthly maintenance at home).

Grumble.
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