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Old 11-06-2014, 10:33 PM   #31
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I now have some bench testing data from the Nova Kool refrigerator while hooked up to two 6 volt Interstate batteries in series while sitting on a work bench in my garage at between 75F and 80F ambient temp. I loaded the refer with a room temperature case of wine and the unit cooled it down in about 6 hours to 6 in the freezer and and 36 in the refer with the control knob set at 4, about half way. After the refer stabilized for about 24 hours I measured the amp draw over the next 24 hours. I measured 84.6 total amps at a 75% duty cycle. This was higher than I expected but will be very manageable with my system. I plan to go camping on Saturday then when I get back a week later I will move the refer outside next to my 19' and cable it to the batteries which are being replenished by two 95 watt solar panels on the roof. I plan to also turn on some other loads to try and simulate the real world while camping at this latitude. Stay tuned!
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Old 11-06-2014, 10:40 PM   #32
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I now have some bench testing data from the Nova Kool refrigerator while hooked up to two 6 volt Interstate batteries in series while sitting on a work bench in my garage at between 75F and 80F ambient temp. I loaded the refer with a room temperature case of wine and the unit cooled it down in about 6 hours to 6 in the freezer and and 36 in the refer with the control knob set at 4, about half way. After the refer stabilized for about 24 hours I measured the amp draw over the next 24 hours. I measured 84.6 total amps at a 75% duty cycle. This was higher than I expected but will be very manageable with my system. I plan to go camping on Saturday then when I get back a week later I will move the refer outside next to my 19' and cable it to the batteries which are being replenished by two 95 watt solar panels on the roof. I plan to also turn on some other loads to try and simulate the real world while camping at this latitude. Stay tuned!
Steve, that draw and duty cycle does sound a bit higher than the earlier estimates, but I think you're right -- your setup can more than handle it. It'd probably work with a single 160w panel and dual 6v as well. Looking forward to your next result.
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Old 11-06-2014, 10:54 PM   #33
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Robert, I was speaking today with a close friend I work with that owns a solar business and he told me he can get me a new 250 amp panel with the same voltage output as my existing panels for about $200 that I could add to my system if I wanted to. This would take my total to 440 watts. I told him about the other tread discussing experiments with solar panels and he suggested that if I buy this panel I consider mounting it on customized bracketing on either the front tongue or rear hitch of the trailer depending on the sun angle while camping and angle the panel to generate the maximum output. This mounting would be highly efficient, stable, fairly secure and not blow over in the wind. Interesting conversation!
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Old 11-07-2014, 12:49 AM   #34
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Steve, Have you determined the highest amperage you can generate in 24 hours with your existing panels? Best I've seen up here was 50A with the 160 flat mounted.
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Old 11-07-2014, 02:07 AM   #35
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I loaded the refer with a room temperature case of wine
Yes, having the right provisions for camping is so important

Looks promising.

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Old 11-07-2014, 09:08 AM   #36
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Steve, Have you determined the highest amperage you can generate in 24 hours with your existing panels? Best I've seen up here was 50A with the 160 flat mounted.
50A 12V from a 160W panel ?

"250 amp panel with the same voltage output as my existing panels for about $200"
3000 W panel for $200 or 250W panel ?
It is so easy to trip.
With a large wattage demand I have measured 15A output from two horizontal 95W panels at high noon in late July.
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Old 11-07-2014, 09:50 AM   #37
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50A 12V from a 160W panel ?

"250 amp panel with the same voltage output as my existing panels for about $200"
3000 W panel for $200 or 250W panel ?
It is so easy to trip.
With a large wattage demand I have measured 15A output from two horizontal 95W panels at high noon in late July.
Yes, I tripped! It is a 250 watt panel. Thx!
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Old 11-07-2014, 10:27 AM   #38
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Yes, I tripped! It is a 250 watt panel. Thx!
Does this 250 watt panel provide 18-20 volts or 36-40 volts?

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Old 11-07-2014, 11:02 AM   #39
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Originally Posted by Jubal View Post
50A 12V from a 160W panel ?

"250 amp panel with the same voltage output as my existing panels for about $200"
3000 W panel for $200 or 250W panel ?
It is so easy to trip.
With a large wattage demand I have measured 15A output from two horizontal 95W panels at high noon in late July.
I knew exactly what I meant, darn keyboard has a mind of their own though.

50A total on an ideal summer day, sun up to sun down.

Best I've seen at any given moment was just over 8A in the summer, mostly it's mid 5's in the fall.
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Old 11-07-2014, 02:21 PM   #40
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Does this 250 watt panel provide 18-20 volts or 36-40 volts?

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Alan, the 250 watt panel he offered has too high a voltage for me. I want to stay with the appx. 17 volt output so he is looking again. Good catch!

Steve
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