Five percent of America's electricity is used for residential air conditioning, and it is considered now to be a necessity, not a luxury. It's usually needed most when the sun is shining, so as I have noted since 2006, Solar Powered Air Conditioning Just Makes Sense. For most of that time I have been looking at absorption units that run like a propane fridge, but I recently mused that perhaps it is time for a change in the way we think about this:I am wondering if the solar powered air conditioner might not be in the end a small, high efficiency home with a small, high efficiency air conditioner powered by a big honking bank of photovoltaics, and be done with it.I am not alone. Jamie Edens of Charleston, South Carolina read the post and wrote, telling me about his search for a solution to what he calls "the crux of our energy problem", all that coal that is being burned to generate the electricity to run that air conditioning. He also noted that there was a big movement everywhere to get off the grid, to stop paying so much money for electricity, but the real problem in doing so was the heavy load from air conditioning, and the poor efficiency of most units on the market.

After hearing a story of how truckers had seriously efficient air conditioners that could run on batteries while they slept, he started hanging out in truck equipment shows and discovered Kingtec Technologies, a big manufacturer of direct current air conditioners for the trucking and RV market. After building a prototype that was a minor hit on YouTube, and with the help of a local Kingtec distributor, Edens convinced the company to build a unit to his specifications.They started with very efficient 48 volt DC unit that puts out 16,000 BTUs at 850 watts, giving it an Energy Efficiency Ratio (EER) of 18.8. (Martin Holladay explains that EER is the cooling capacity of the appliance (in Btu/h) at an outdoor temperature of 95°F divided by the current draw of the appliance in watts.)They added a 45 amp solar charge controller and a 20 amp/hour battery as a buffer for when clouds block the sun. All you have to do is stick it in your window like a regular air conditioner, plug in a thousand watts of solar panels and it will run all day.

Add more batteries or add a grid connection power supply and it will run all night. air temp hvac systemsSo for $2895 plus a thousand bucks worth of solar panels, you in business.central ac repair or replaceEdens has been to China and played with the prototype. cleaning wall mounted ac unitComparing it to his prototype, he writes:The new air conditioner blow three times harder and has twice the BTU output. The efficiency are there and it is ready to change the world. It's not a toy- the beauty of this air conditioner is that all of the solar components are installed in the air conditioner and the engineering is done for you. All you need to do is plug in your solar panels and turn the unit on.... Air conditioning doesn't need to burden to the grid, our finances and contribute to global pollution.

It can contribute a new start to clean things up and sustain the earth for the long run. 16,000 BTUs is not comparable to a typical home air conditioning unit; it's a big window unit that might normally condition 600 square feet. But if you combine it with an equally efficient home, you might have something here. After I mused about a photovoltaic powered AC unit earlier I wrote Martin Holladay at Green Building Advisor for his thoughts and he replied:So, if you want to minimize your air conditioning bill, install low-solar-gain windows on your west (and perhaps east) walls, include wide roof overhangs, install deep attic insulation, minimize your air leakage, install an efficient air conditioner ... and then install PV, as much as you can afford. In other words, I agree with you.Jamie Edens and Kingtec have built a neat little package that runs on a lot less than my "big honking bank of photovoltaics"; combined with a small home designed around its output (not a difficult thing to do) and you've got that holy grail I've been looking for: the effective and affordable solar powered air conditioner.

AC and DC powered heating, venting & cooling- air conditioning (HVAC) for rolling stock: metro's, locomotives, subway rail vehicles, high speed train's, passenger train's, Tram's, light rail passenger vehicles, automated people movers, coaches, and wagons.High efficient electric HVAC (Heating, Venting & Cooling) for rolling stock, people movers, locomotives and electric vehicles supplied off the shelf or custom made air conditioning offered in 12V 24V 48V 74V 110V 230V 400V in AC and DC voltageWe assist our customers to achieve the heating, Venting & cooling they need. Our Low power -High output units are compact and can be easily installed on new and legacy train's, metro's tram's, locomotives and other rolling stock to enhance passenger and driver comfort. To reduce development cost and lead time we have developed standard products which can be adapted to fit your application. Custom made units are possible as well.  Dc Airco DC powered direct current and AC powered heating, venting & cooling- air conditioning (HVAC) for rolling stock units are designed to meet the following specifications:Fire & smoke specification: BS 6853 ;

EN 45545Vibration and shock: EN 61373:2010EMC: EN 50121-3-2:2006; EN 61000-4-2/6Standard for passenger cooling: EN 14750Standard for driver cab cooling: EN 14813Air Conditioning For Caravans & MotorhomesA mini split-pack a/c refrigerant unit that cools your camperEasy to storeBuy online or order on the telephoneFor Caravans and MotorhomesCan be removed when not requiredSUITABLE FOR A VARIETY OF VEHICLESCan be hung from most windows with supplied bracketsGREAT FOR CARAVANS AND MOTORHOMESCan be hung from rear windowsCAN BE POSITIONED ON A-FRAME OR A TABLE A fully flexible air conditioning solution dots 1dots 2dots 3dots 4dots 5dots 6 Air conditioning for motorhomes and caravans When camping during the hotter months high humidity and high temperature can lead to discomfort and sleepless nights in motorhomes, caravans and campers. We offer a cost effective and quick method by which you can cool your camper. If you use your touring caravan or motorhome during the summer or if you travel to Europe you're bound to have dreamt of having an air conditioning in your caravan or motorhome.

But let's face it, roof mounted air conditioning units can cost between £1,600 to £2,200 including fitting. They also weigh a considerable amount and there's a good chance you will lose your investment when you sell or trade in your van. You will jump at the chance of having this unit because there are no installation costs! It's completely portable and hangs on your van window. Plus it is easy to install and easy to use. This is a proper refrigerant split pack unit with external condenser unit and internal fan unit with user friendly controls. It’s not a water-cooled or a thermoelectric cooler. The unit is suitable for electrical connections often found on site in Europe where they are restricted to 6, 4 or 3 Amps. This unit only uses 350 watts – that's 1.52 amps and will not trip low wattage hook-ups! A portable air conditioning unit which can be moved to balance the load in your tourer caravan making it easier to get the maximum nose weight. A portable air conditioning unit can be left at home (if it's not going to be needed) thereby reducing your towing weight or improving fuel efficiency on motorhomes.