Definitive AC in to DC charge out ratio for Xantrex SW4024
teneagles
Registered Users Posts: 4
I have to rent a generator to equalize my bank, and want to know what to set the AC2 120v input and DC 24v charge out settings at according to the output of the generator I must rent. Depending on when I rent one, I have many different wattages and ac jacks that I end up with. Last time I uses a 3500 watt continuous through a 30 amp twistlock, with a 25 amp rated breaker. But the inverter would throw an error and reset if I set the ac2 in higher that 20 amps, and the DC charge higher than 10 amps. Now a 120vac to 24vdc, 2acato1dca ratio doesn't seem right to me. I have had sweeper battery chargers that would easily deliver 12 amps VDC on a 10 amp vac circuit, 20 amps of VDC on a 15 amp vac circuit, and 30 amps of vdc on a 25 amp vac circuit. So I am perplexed to say the least. The top acin setting in the sw4024 is 66 amps, and the charger is rated at 40 with top ACin. That ratio looks to me to be roughly 1.5aca:1dca.
Carrying that thought through, you would think the internal charger would deliver the same 1213 amps without causing the gen to bog down too heavily and/or causing the inverter to throw an error, but it does. And since the generator is 3500 watts continuous, a 20 amp draw through a 25 amp circuit with a 30 amp plug and receptacle, shouldn't be causing it to bog down much at all. That's only 2400 of the 3500 rated continuous watts, yet it it does bog it down and throw an error. So either I am both understanding and setting all of this all wrong, or there are other gremlins about that I don't understand.
I have some larger and far more expensive generators I can rent, one 4800 and the other 5600 watts, but I really would like to know my proper ratio info before I decide which one is best to try next.
Thanks in advance...
Zac
Carrying that thought through, you would think the internal charger would deliver the same 1213 amps without causing the gen to bog down too heavily and/or causing the inverter to throw an error, but it does. And since the generator is 3500 watts continuous, a 20 amp draw through a 25 amp circuit with a 30 amp plug and receptacle, shouldn't be causing it to bog down much at all. That's only 2400 of the 3500 rated continuous watts, yet it it does bog it down and throw an error. So either I am both understanding and setting all of this all wrong, or there are other gremlins about that I don't understand.
I have some larger and far more expensive generators I can rent, one 4800 and the other 5600 watts, but I really would like to know my proper ratio info before I decide which one is best to try next.
Thanks in advance...
Zac
Comments

Re: Definitive AC in to DC charge out ratio for Xantrex SW4024
What are your loads ?? Once the Inverter accepted the ACin it transfered your loads to Pass through, any amps left were used for charging. 
Re: Definitive AC in to DC charge out ratio for Xantrex SW4024
According to manual max generator support is 24 amp. Kind of curious why a 3500 watt continuous generator would only have a 20 amp c/b on it? Looks like it is really designed to only deliver about 2000 watts continuous. 3500 watt = @ 29 amp which by NEC would need a 40 amp breaker?GT3.8 w/4600W Trina 230W, TX5000 w/5000W ET250W, XW4024 w/1500W ET250W, 4 L16, 5500W Gen. (never had to use) Yet!! 
Re: Definitive AC in to DC charge out ratio for Xantrex SW4024According to manual max generator support is 24 amp. Kind of curious why a 3500 watt continuous generator would only have a 20 amp c/b on it? Looks like it is really designed to only deliver about 2000 watts continuous. 3500 watt = @ 29 amp which by NEC would need a 40 amp breaker?
3500 Watt @ 240 VAC perhaps: 15 Amps. 
Re: Definitive AC in to DC charge out ratio for Xantrex SW4024
He is talking 120 v in his description?GT3.8 w/4600W Trina 230W, TX5000 w/5000W ET250W, XW4024 w/1500W ET250W, 4 L16, 5500W Gen. (never had to use) Yet!! 
Re: Definitive AC in to DC charge out ratio for Xantrex SW4024
But if the gen is 3500 @ 240 then the 120 legs may only be capable of half that each.
Not enough details. 
Re: Definitive AC in to DC charge out ratio for Xantrex SW4024
You are correct, I thought his numbers were off too.
Guess the real guestion to OP is we need more specific information on output of generator to inverter, 240 v vs: 120v. Age of inverter (I was looking at new Conext SW4024 specs) so I may not be looking at correct data if older model. Etc.
Checked a couple of generators in that size online and some are only 120v with the specs on the plugs and breakers as he described. Even the Honda in 3000 watt is 120v. Need specifics of generator he is/was using. Would be preferable for OP to rent a generator that was 240vac output to fully use it for charging and load.GT3.8 w/4600W Trina 230W, TX5000 w/5000W ET250W, XW4024 w/1500W ET250W, 4 L16, 5500W Gen. (never had to use) Yet!!
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