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Dynasys APU
Hodyon Auxiliary Power
Dynasys – The Best Solution to Engine Idling
Idling a Class 8 truck engine for in-cab comfort is extremely costly. It increases fuel costs, engine hours and overall truck wear. This leads to an increase in service cost and engine maintenance.
With Dynasys auxiliary power, you can shut down your engine and maintain your comfort while reducing operating costs.
Externally mounted on the truck rail, Dynasys is protected in its own weatherproof enclosure and operates using the truck’s fuel supply. This diesel-electric system provides dependable comfort for the driver during down times, reduces emissions and dramatically lowers fuel costs during idling. 
Why Businesses Large and Small Choose Dynasys APU
Fastest Install Time
With Dynasys APU’s non-integrated four component design, installation times are among the fastest in the industry. The mounting system offers maximum flexibility to accommodate all current Class 8 truck frames and can be located on either side of the truck and behind fairings.
Year-Round Power
Dynasys APU utilizes R134a hermetic-style A/C and electric heating to provide year-round comfort. The 6000W of power comes from a belt-driven generator (not an inverter which can be harmful to both batteries and alternators). The Dynasys APU is designed for easy servicing while utilizing components specifically engineered for heavy-duty applications.
Easy Maintenance
- Service intervals match the truck’s maintenance schedule
- Removable cover provides easy access to all maintenance items.
- 1000 hour oil change interval
- Convenient access to breakers
- Self-tensioning serpentine drive system
Dynasys Features & Benefits
- Independent Design – Dynasys APU is completely independent of the truck system.
- Rugged Stainless Steel Enclosure – Resistant to corrosion under almost all conditions
- Durable Hermetic A/C – a long-lasting maintenance free system with a beltless compressor and shore power capability
- One Touch Control Panel – easy to use microprocessor interface
- Auto Start Functions
- Low Voltage Start-up – monitors batteries to avoid costly jump starts and road side assistance from alternator failure
- Comfort Control – allows effective and efficient start/stop to maintain desired internal temperature and achieve maximum fuel savings
- Programmable Time & Date – allows pre-warming/cooling of the truck’s cab and engine
- Compact Design – less than 20 inches of frame rail space.
Features at a Glance
- R134a hermetic-style A/C and electric heating for the sleeper.
- 6000W 120v electrical power to run appliances
- Powers block heater to ensure cold weather starting
- 55 Amp Alternator charges batteries
- Stand-alone design for true auxiliary power
Specs
| Engine | 2 cylinder, 12hp, liquid-cooled Yanmar diesel engine |
| Generator | 6kw 50 Amperes AC 120v |
| Alternator | 55 Amperes DC 120v |
| Receptacles | 2 – 120v |
| Weight | 385 lbs |
| Unit Dimensions | (WxHxD) 18” x 27” x 25” |
Bunk Heater/ AC Unit
| Dimensions | (WxHxD) 11.5” x 12.5” x 22.25” |
| Heat | 12,000 BTU |
| AC | 12,000 BTU / hr hermetic compressor |
14 Customer Reviews of “Dynasys APU”
Review by Max, November 24, 2010
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4.2There seems to be a ton of manufacturers out there these days. I know when I first got my Dynasys APU there werent many to choose from, that seemed decent anyway. My company logs a ton of miles monthly, and we needed a DURABLE unit that we wouldn’t need to worry about servicing continually. We went with Dynasys because of their reputation and we have had no problems… I take that back, actually, we had 1 unit that needed repairs near purchase out of the 23 that we have in service. We had 1 unit stolen right off the truck too, but can’t blame the company I guess…
Review by Jason, January 13, 2011
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5Cantwell Power Solutions is a sales and service dealer for Dynasys APUs. We have been in the APU business for 5 years and have dealt extensively with many of the units mentioned here. We find the Dynasys to be an excellent unit, reliable and well-priced. We are centrally located at the intersection of IH 35 and IH 20 in Ft. Worth.
Review by MSR Industries LLC, January 17, 2011
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4.2Good Unit so far. The customers seem to appreciate the performance and are interested in purchasing more in the future.
Review by J A I TRUCKING LLC jesse, January 21, 2011
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4I PURCHASED 3 UNITS FOR MY TRUCKS, OVERALL THEY WORK GREAT. BUT A COUPLE OF DOWNS I SEE IN THEM IS THE A/C COOLS GREAT BUT A/C COMPRESSOR NEEDS TO BE ON LONGER THAN TURNING OFF SO QUICK THAT THE EVAPERATOR DROPS ITS COOL TEMPERATURE, THAT IT TAKES A LONGER TO COOL THE SLEEPER IT WOULD BE NICE IF IT COULD STAY IN CONSTANT COOLING OR REPROGRAM THE CYCLE SETTING ON THE CUT OFF TO STAY ON A LITTLE LONGER THAN WHAT THEY ARE PROGRAMED TO NOW. THE FAN BLOWER IS AWESOME IT PUSHES AIR SO HARD ON HIGH, THAT IT REALLY COULD USE A MEDIUM SELECTION CAUSE IT COULD BE A LITTLE LOUD.. LAST DOWN FALL BUT WORTH THE FUEL SAVINGS, IT COULD USE A GOOD MUFFLER TO REDUCE THE NOISE OF THE A.P.U..
Review by KGS Trucking, Ken, January 27, 2011
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4.4Overall it is a good unit. The blower fan speed on low could be at a slower speed. It would be nice to have a quiter unit. The noise is either from the air intake or from the exhaust system. I have owned 3 apu units and I think the dynasys is for superior.
Review by Mark Luetchens, February 5, 2011
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3.6I think it is a fairly good unit,except now it is down and we are having trouble getting it worked on. Dealers or service centers don’t keep parts on hand so its takes two trips to get it fixed. When it was working it seemed to work really well. One small thing I noticed is that the cover is hard to get off. The latches didn’t want to release over the weather stripping. Just something little I don’t think a guy should have to worry about.
Review by Cindy, February 9, 2011
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4.8Too Loud – should have an oil pan heater option
Review by Roy, March 6, 2011
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4.6Have not had the unit/system very long. I have spent years not idling the horse and got tired of being uncomfortable. In the short time I have had the unit I am very impressed. As I looked at other units, this package was very well designed. So far I have not run the AC. It has not been warm enough. The heat works great. The only thing I have say bad is it could have a quieter muffler on it, but the one that is on there is not as loud as some of the others. I may post another review after we have had this for a bit. I can’t be to critical this early in the game. It is awesome to not idle the horse to stay comfy!!!!
Review by Roy, March 20, 2011
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4.6I am writing another review after I have been able to use the unit for the first 50 hours.
Needless to yes, I am very impressed. There were 2 problems. The first problem was a little loss of oil each morning through the drain plug. The drain plug, which is nice, must be in the
proper position to not leak. The next problem was the latch on the top right of the cover, would snag on the overflow tube to the antifreeze reservoir. The tube would leak, being pushed to the side. Had to reroute the tube under the main coolant tube to keep the latch from snagging. Adding a very small zip tie to the overflow tube keeps it from leaking. Added a 1/2 cup of distilled water to replenish. The fixes are working fine. I am very spoiled now being able to sleep at night in comfort. The sound of the unit is taking some getting used to. I am a light sleeper but am getting used to it.
Review by jesse, March 28, 2011
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3.6can anyone tell me how is you\’r a/c doing.. now that the heat is here, cause i know as everyone else, on the heating side it does very well..no problem there.. so any comments on the a/c side .. cause im starting to be an unhappy camper.. or maybe the installation on my units were not done right..
Review by Don & Lisa, April 1, 2011
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4.8Haven’t had the unit very long but, so far we are pleased with the unit. It was a good size and we were able to put the skirt back on with a few modification. Had 1 problem with the A/C kicking out so I called Big Rigs where we purchased the unit and told them the problem and they called me back in 15 min. They had me change the (blown) fuse on the back of the unit which I didn’t no it was there and now it works great again. Have to agree need to have a medium fan speed and make it quieter somehow.
Review by Semi Truck Accident Lawyer, May 5, 2011
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4.4We get great reviews of the Dynasys APU with our clients. We represent folks that have been injured or were involved in semi truck accidents, and I’ve seen some crazy examples where the Truck was totally destroyed and the APU remained in almost near perfect shape. Perhaps it is the location it is placed, but I thought I would share that story of it’s durability.
Review by Phil Greenwell, June 22, 2011
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4.6Closing in on 500 hrs of operation since March 2010 in the lower 48 states. So far, so good–unit has operated as advertised and has kept me comfortable. Its now June and all remains well so we’ll see how the real Summer heat is handled by the unit. I suspect it will work just fine. My last unit was a Cummins Comfort Guard which was a continuous and expensive problem so a comparison wouldn’t be very useful. The unit is cleanly installed on a Volvo VNL 780 so there’s a lot of sleeper area to maintain and it does it well.
My only suggestion at this time would be that the oil drain assembly have a 90 degree elbow coming out of the block which would eliminate the “kinking” of the drain tubing and make oil changes easier and faster. I’ll post again after more experience.
Review by Ken Trucking, February 16, 2012
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2.6over 700 hours. Never worked from day one. Was a mistake
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