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Old 08-12-2014, 06:59 PM   #1
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Anybody have one of these ?

It slim, and 16,000 BTU as well !

Comments?

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Old 08-12-2014, 07:11 PM   #2
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It looks great, but I think you would have to have a very large solar array to make it work, especially if you are boonie camping and using solar power for other devices. Hot but overcast days might be a problem too. I, too, would be interested in hearing from anybody who's tried one.
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Old 08-12-2014, 07:33 PM   #3
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Quote:
Originally Posted by road dogs View Post
It looks great, but I think you would have to have a very large solar array to make it work, especially if you are boonie camping and using solar power for other devices. Hot but overcast days might be a problem too. I, too, would be interested in hearing from anybody who's tried one.
Night also presents an issue. It's 48 v and draws as much as 18 amps. That works out to 7.2 amps at 120 v, which would be amazingly efficient for a 16,000 BTU air conditioner. I too would like to hear of actual real use.
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Old 08-13-2014, 10:02 AM   #4
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Will look into this. We have 1.42 kW and this ac supposedly draws less than 1 kW. We do run the Dometic (which is an energy hog) as combination of solar and battery bank but pulls over 1 kW from the battery bank while running
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Old 08-15-2014, 09:16 AM   #5
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It worries me that they don't know the difference between inverters and converters, from their info

Quote:
Can also purchase two 110v inverters to run on AC power (wall or a generator).
The interesting thing about the unit is that it is designed for DC rather than AC power. Too bad it is 48 volts.
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Old 08-15-2014, 09:30 AM   #6
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It worries me that they don't know the difference between inverters and converters, from their info



The interesting thing about the unit is that it is designed for DC rather than AC power. Too bad it is 48 volts.
Kingtec offers 4 RV A/C, only one works on 48v DC. The other three are 115 v AC units.
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Old 08-15-2014, 09:31 AM   #7
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Pasdad1

We are unable to read the manufacturer from the picture.

Googled the subject and Securus makes as 12V system that requires AC to get it started and then run on 12 V. They also make a 48 V system that runs entirely on 48V DC

Happily our battery bank is 48V nominal (4 LFP batteries of 4 cells each in series). Battery bank feeds into 4.0 kW PSW inverter and converter to step down to the 12V DC system of trailer. Using this would require wiring from battery bank but should be doable.

The 48V is what we would go with if it proves to be viable. The Securus website correctly notes that there would not be energy loss from inverter, and from converter. Running directly from 48V battery bank would definitely increase efficiency.We probably have 20% energy loss when we run air conditioner as power goes from panels (at 90V) to controller (to 48V nominal) to battery bank, and finally through inverter.
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Old 08-15-2014, 01:07 PM   #8
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Originally Posted by Reed Cundiff View Post
Pasdad1

We are unable to read the manufacturer from the picture.

Hi Reed,

It's Kingtec

Here is the website

http://kingtecusa.com
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Old 08-15-2014, 03:05 PM   #9
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Pasdad

Thanks for the information. Read one semi-review that thought it great but the guy had not used it.

So I have sent an e-mail to their contact site asking for further information.
As I have noted elsewhere, our system is pretty much solar autonomous:
1.42 kW solar with panels ganged in two series of three each so that power
comes off roof at 90V or so.

This goes through Morningstar MPTT-45 controller (1300 W at 90V is only around 14 amps) to battery bank: 4 batteries each composed of 4 LFP cells. The batteries are in series to form a battery bank at 48V nominal (54.6V float).

Electricity then goes through 4 kW PSW inverter and/or controller that drops voltage to 12V nominal

As the site notes: there are power losses at each step from panels and we know that there is sizable loss through inverter. 750 W actual usage would be incredible. We would put it in the bedroom to cool the place down at night.

We believe our son (original licensed alternative energy contractor in NM since 1991) might well be interested in this system as well for his purposes. Will see what we hear from Keltec.
Reed and Elaine
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