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Old 06-10-2017, 05:43 PM   #11
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is there a chance the generator is trying to run the A/C and charge the house batteries at the same time? when you say kicks off after 25 minutes, the generator trips its internal breaker? or does it get hot and shut down? or the A/C unit stops cooling aftyer 25 minutes?
-Christopher
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Old 06-10-2017, 05:57 PM   #12
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That is what I am not sure of. The way I understand it is, the generator is powering up the A/C and sending power to the inverter to charge the batteries. The A/C stops running (completely shuts off). The generators internal breaker trips. Right now it shuts off as soon as I switch the A/C on. The generator or the A/C doesn't have a chance to get too hot.
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Old 06-10-2017, 06:20 PM   #13
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Temporarily disconnect the battery charger and try the air. Your ac unit needs 15amps alone without anything else on that circuit. Without an ammeter it's hard to test amperages but I would think that the battery charger draws significantly.
Does your battery charger give you any indication what it draws?
Your wire size seems fine but maybe you should rewire for a 50 amp outlet for shore power. The #8 is good for 40 amps so is borderline I would say for that load of the ac among everything else. You could increase that to #6awg to prevent that wire being worked to the max which is a fire hazard too.
Like others have suggested, see if the genny all by itself will start and run the ac unit only.
Good old Ohms law at work here it seems.

John
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Old 06-10-2017, 06:42 PM   #14
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What John says.. isolate it out, or if you have a clamp on meter to see what the output current pull of your genset is when the air condition is turned off.

If you can isolate put your batteries or charge them fully at the home before trying the gen set.

Ultimately it sounds like if you were to run your house bats dead and want to recharge via gen and run the air you may have too small of a set. But yes isolate first like John says
Christopher
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Old 06-10-2017, 06:43 PM   #15
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I know this is a stupid question but have you checked the oil level in the genny? A company I worked for bought a few air compressors from HF and didn't know that the compressors were shipped and sold dry and you had to buy oil separately?
Have no experience with there gennies and just a thought?
I had a chance to buy two xantrex inverters a while back priced from a friend who got them for free but anyway someone here when asking about them told me to look at the date codes cause (can't remember) before a certain year they were US made and golden but after that they were sold to China and went to ****? Post was around a year and a half ago and I hate to call names but it might have been family wagon? If it's not I am sorry FW.
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Old 06-10-2017, 07:35 PM   #16
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Can you describe what type of ac unit you have? The make? Is it the roof mount RV type or something else?
Has it been cleaned lately if not new? Dirt will clog the fins and muck the fan up too. Has it been recharged lately or ever?
These conditions will lead to poor performance and tripping of the breaker.
Better inspect it if you haven't yet.

John
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Old 06-10-2017, 09:07 PM   #17
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I have isolated the generator and A/C by tripping the inverter breaker. So the only place the generator power can go is to the A/C unit. Still has the same effect. Generator overloads and A/C shuts off. The A/C unit is a Dometic Air Brisk II 13,500 BTU roof top. I installed it new. This is the first season using it. I'm not sure of the date code. I'll have to look at that tomorrow. The generator is new also. I put 20 oz of oil in it. Thanks for the help again. Little by little I may narrow it down, or at least rule out some things.
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Old 06-10-2017, 09:27 PM   #18
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are you using a 30 amp plug into the genny or the smaller 20 amp plug?
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Old 06-11-2017, 09:27 AM   #19
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I have used both the 30 amp plug and the 20 amp plug into the generator. Same result.
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Old 06-11-2017, 09:29 AM   #20
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what if you plug the AirCon directly to the generator?
-Christopher
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