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Old 06-18-2018, 03:11 AM   #1
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Default AC on batteries test - results!

Before I handed off my Xplorer to her new owner, I wanted to do a test of running the air conditioning for an extended period.

I installed the LG 9000 BTU high efficiency air conditioner to replace the original unit the van came with. That unit was a big energy hog with no cycling, 1500 watts load and a deafening amount of sound.

I had installed a 2800 watt Magnum pure sine wave inverter, the advanced remote and the BMK kit. For batteries, I had four, 125 amp hour Stark Power drop-ins.

It was a sunny day today, temp in the low 80's and not really humid (Southern California). I turned on the inverter and then the AC on eco mode, set at 72 degrees.

It ran full blast for a bit, maybe 30 mins, and then would cycle on and off. At 5 hours in, I was down to 78% SOC, so I stopped the test. I wanted to see if the amp draws and it running overnite was even a possibility. I concluded it is.

At peak, on the draw between the AC and the refrigerator (it switches to 110v mode when the inverter is on) of 55-58 amps. Around 7 is the refrigerator. During part of this test, I was getting input from the solar of around 19 amps (the magnum display would fluctuate between 37 to 42 amps at peak). To my amusement, the inverter didn't break a sweat - no fan noise, and no appreciable heat on it or the cabling.

I hate to part with this van now - everything is working so well!

One nice thing about this air conditioner is that it has a timer function - so you could set it to shut itself off after you fall asleep - so you could run a bit to cool the rig down, then run a bit while you fall asleep, and then shut itself down. That would extend battery use greatly.
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Old 06-19-2018, 02:25 AM   #2
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Thanks for the update! I forget - how much solar did you have?
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Old 06-19-2018, 02:36 AM   #3
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Quote:
Originally Posted by Phoebe3 View Post
Thanks for the update! I forget - how much solar did you have?
400 watts. My data log though has some high output days showing peak of 496 watts.
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Old 06-20-2018, 02:14 AM   #4
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Thanks for the test results wincrasher. It'll help me pick an AC for my next B. I have a 12 volt air conditioner on my sprinter and seems like it doesn't cool too well. Plus the condenser is under the van. At least I can pre-cool the van with my dash AC but I think a roof mounted AC would work the best.
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Old 06-20-2018, 03:17 PM   #5
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.

Do you have a blog in the AC replacement?

I thought I saw it before, but can't find it now.
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