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Wiring my camper trailer. Questions.
Posted on 3/24/20 at 3:54 pm
Posted on 3/24/20 at 3:54 pm
I have 4 12v AGM batteries wired in parallel. Each battery is 55AH. That should increase capacity to 220AH. If my window unit (AC) is 4amp, how long should my AC run at night?
6
Posted on 3/24/20 at 4:13 pm to DLauw
no, it doesnt work that way, its not exact, you lose some between each connection.
but you should have at least 200AH now from that
as for the rest, school is canceled so im not doing your homework for you
seriously though, startup on the compressor each time it starts draws a power surge so there is a lot of variables in how long you can run the a/c
but you should have at least 200AH now from that
as for the rest, school is canceled so im not doing your homework for you
seriously though, startup on the compressor each time it starts draws a power surge so there is a lot of variables in how long you can run the a/c
Posted on 3/24/20 at 4:27 pm to keakar
I understand it’s not exact. I just want to be sure the AC will run all night for a few nights.
ETA: Thanks for the reply
ETA: Thanks for the reply
This post was edited on 3/24/20 at 4:27 pm
Posted on 3/24/20 at 4:40 pm to DLauw
You need to find out what the amp draw of your compressor is. Then depending on how hot it is and how many times the compressor kicks on. Without knowing how many times your compressor will kick on during a day, it is hard to give you an answer.
Posted on 3/24/20 at 4:47 pm to DLauw
You have a 12 volt AC that only pulls 4 amps? Something is off here. It's got to be higher than that.
Either way, countless variables here like everyone has said. I wouldn't think youd get much run time of an AC on battery power, even with 4 of them unless they're huge.
Either way, countless variables here like everyone has said. I wouldn't think youd get much run time of an AC on battery power, even with 4 of them unless they're huge.
Posted on 3/24/20 at 5:00 pm to DLauw
Assuming you are running an inverter it takes about 10dc amps to produce 100 watts in AC. With your AC pulling 4 amps that is 480 watts and you would be pulling 50 amps from your battery bank. I'm saying about 4 hours or so.
Sidenote, if you pull the batteries down too much and the compressor tries to kick on it takes 4-6 times the energy to start the compressor(16-24 amps to kick off).
Sidenote, if you pull the batteries down too much and the compressor tries to kick on it takes 4-6 times the energy to start the compressor(16-24 amps to kick off).
Posted on 3/24/20 at 5:04 pm to DLauw
What the make and model of your power inverter.
Why i'm asking, is because not all inverters are created equal
You will need 300 amps of DC power to start the 5-amp air conditioning unit and then a continuous 60 amps to keep it running.
Why i'm asking, is because not all inverters are created equal
You will need 300 amps of DC power to start the 5-amp air conditioning unit and then a continuous 60 amps to keep it running.
Posted on 3/24/20 at 8:05 pm to DLauw
I don’t have the exact answer. But I can tell you that your set up will not work. An a/c unit draws too much for batteries. Like the other guy said get a cheap generator.
Posted on 3/24/20 at 8:10 pm to DLauw
1) start your generator
2) start your AC
3) turn your battery switch to all
4) turn off your generator
2) start your AC
3) turn your battery switch to all
4) turn off your generator
Posted on 3/24/20 at 9:49 pm to cgrand
You would need a DC generator attach to the batteries and a inverter to work like above.
Or you would have to have a way to sync the A/C from the generator with the inverter before turning the generator off.
Or you would have to have a way to sync the A/C from the generator with the inverter before turning the generator off.
Posted on 3/25/20 at 5:34 am to DownshiftAndFloorIt
quote:
You have a 12 volt AC that only pulls 4 amps? Something is off here. It's got to be higher than that.
Was thinking the same. Even if The a/c only draws 4 amps, that’s at 120v. The amp draw isn’t linear between the ac and dc sides of the inverter. You will be drawing roughly 10x the ac amperage load on the dc side, or 40 amps. Remember, as voltage decreases, amperage increases. Furthermore, what is the inrush current when the a/c compressor starts? There will be a helluva voltage drop at that point. Maybe enough to trip the inverter off line. There’s a reason this setup isn’t available on fifth wheels, campers etc.
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