For those of you wondering about the difference between 12v compressors and inverter powered 115v volt unit, this video is for you!
Пікірлер: 46
@sv_dandelion3 жыл бұрын
Thanks for putting this together. It’s one thing to see claims posted on a forum, but seeing side by side proof of 120ac vs 12dc is ultimately all that matters. In the end, if it pulls 40 amps and my boat is cold, then nothing else matters.
@MabruPowerSystemsINC3 жыл бұрын
Thank you for the feedback!
@christopherrolfe93423 жыл бұрын
Sounds too good to be true! Inverters are usually 90% plus efficient, so aside from the inverter is the 12v unit really 3x more efficient than the 115V version or is it just that it's putting out (absorbing) less BTUs? EER=29 really? What I would have like to see with this comparison is the flow rate and temperature change of the cooling water for each unit - this is an easy way to know the real BTUs Q=mc delta T. If it's true, I would buy one!
@gerardosantiago51793 жыл бұрын
Awesome ! Can't wait for my installation.
@Pimptorious693 жыл бұрын
How many square feet will the 12k DC unit cover?
@bradwhite62543 жыл бұрын
Something is not right. If you dived 12,000btu/414w you get an EER rating of around 29 for the 12v unit. That is too high to be believable. Is there something I don't understand?
@boatrx3 жыл бұрын
Modern variable capacity air conditioners can be found with an EER in the upper 20's.
@bradwhite62543 жыл бұрын
@@boatrx Have you done an install of a Marbu DC system yet and checked the EER? Would love to see that. I've seen your Termodinamica videos. They loo good but16K is too big for my boat.
@raoulduke33333 жыл бұрын
That does seem unbelievably high. If this video is correct, I'll pay the $5,000 for it.
@christopherchow42253 жыл бұрын
@@raoulduke3333 guess how much the unit is....
@GreatRockRealEstateDenver2 жыл бұрын
@@boatrx I have a mini split system in my garage (220 volt) that is variable capacity and it kicks the pants off of my whole house AC unit which is not variable capacity. I don't need expensive test equipment to tell the difference, my electricity bill is the evidence. The variable capacity technology really is a game changer.
@user-zt6bt8dp2c2 жыл бұрын
Can this be installed in a semi truck? I have a unit in my bunk that runs off the compressor but looking to replace it with an electric unit. Maybe I’d have to install more batteries so it won’t completely drain them
@sailingsolo52902 жыл бұрын
Whats seer value on AC powered unit. I saw a recent video of a 12000 split w 21 seer. It was using 180 w after using 500 to bring to temp.
@usmcp2 жыл бұрын
I'm interested in mounting one of these units in an RV to have ac and heat with remote control. Does the unit consume water in use (requiring constant water intake) or would using a radiator be enough to keep the system operating?
@bill22922 жыл бұрын
I like your AC and heating system, but I think we need another round of testing here. It doesn't seem correct that a 120v AC unit would use 3x the energy as a similarly designed 12v DC unit
@MabruPowerSystemsINC2 жыл бұрын
The similarities are only in the appearance. The 12v unit utilizes a twin rotor, variable speed compressor and a PM DC blower. Just the change in blower consumption alone is about 10A. What else would you like to see as far as data on future tests?
@liemarposter11749 ай бұрын
Psi ? And Amper?
@jeffmcknight6953 жыл бұрын
I appreciate the video as it proves that sustainable A/C is possible on DC. Do you have aspirations or capability to use 48 VDC compressors? I currently have an electric powered catamaran and would like to use the 48 VDC propulsion banks for A/C when anchored. I could use a step down converter for 12 volts, but I would rather use the 48 VDC in order to use smaller gauge wiring and negate a step down converter.
@MabruPowerSystemsINC3 жыл бұрын
Jeff, We do not currently have a 48V system in development. We are currently working on a larger 24v system but it is still under development and expect to release it early 2022. We have not had sufficient demand to warrant a redesign to a 48v system as of yet
@russ44853 жыл бұрын
Quite impressive efficiency! Does your test amp draw on the DC unit include the amp draw from the 12v sea water pumps as well? How many amps does the 12v sea water pump draw?
@MabruPowerSystemsINC3 жыл бұрын
The pump draw is not being shown in this video on either of the units being tested. Amp draw of the pump is about 1.5A @ 12V
@ericmason62233 жыл бұрын
Good video! This may be a stupid question but does a 12k btu 12 volt remove heat in room as fast as the 115 volt? I know in my car the 12 volt AC unit is affected by the rpms of the motor
@MabruPowerSystemsINC3 жыл бұрын
Not a stupid question at all. Automotive ac isn't 12v but actually belt driven which is why your ac will work better at higher RPMS (belt is turning faster) the blower portion is 12v. Our unit is completely 12v so there is no relation between engine speed vs cooling capacity of the unit, same as 115v.
@alcibiadesmarcialneto9223 жыл бұрын
I really didn’t understand what you try to present. 12k BTU is 3,51kw no matter it is connected to 115vca or 12vdc. Inrush current exist in both cases. By using a inverter you must add its energy consumption. You can add softstarters to reduces inrush’s current if this is the problem.
@MabruPowerSystemsINC3 жыл бұрын
The point of this video was to clear up that exact misconception. 12,000 BTU running on 12v with new DC technology is vastly more efficient than 12,000 BTU 115v running though an inverter. The Running amps are in the video as well as inrush amps. Startup on 12v unit can be viewed at 7:00 in the video vs over 300A startup on 115v @ 12v viewed at 4:40 in video.
@alcibiadesmarcialneto9223 жыл бұрын
Mabru Power Systems, INC sorry but something is confuse. The 300A is in 12vdc, right? This is ok since 12kBTU means 3.6kw. Inrush current is very short in time to be caught by regular instruments, you must have a special one. Thanks
@MabruPowerSystemsINC3 жыл бұрын
@@alcibiadesmarcialneto922 326A inrush was for the 115v unit running though an inverter @12v. The inverter display was able to pick up the current spike when the compressor kicked on but yes, we do have some very specialized testing equipment to properly test and develop our systems
@boatrx3 жыл бұрын
Alcibiades, 12k BTU is 3,5 KW if you are just converting units of BTU to KW. For example, if this were an electrical resistance heater, it would take 3.5KW of electricity to create 12k BTU of heat. However, I think your misunderstanding is that an air conditioner does not just eliminate heat. It moves it. In the case of these marine air conditioners, they are moving heat out of the room and into the seawater via a water cooled condenser. So on his 12v unit, he is using about 450 watts of power to move a nominal 12k btu/hr of heat out of the air in the room and into the water circuit. This heat is not being created, or eliminated. Only moved from one place to another. That is the magic of air conditioning!
@majid_us3 жыл бұрын
Sorry, just checking. So, the conclusion was that the 12 volt DC compressor (because of lower current draw & no in- rush current) is better than the 115 volt AC. Yes??? Thanks
@MabruPowerSystemsINC3 жыл бұрын
They are both great units, 12v unit is simply more efficient and the only viable route to go if installing on a vessel without a dedicated generator.
@majid_us3 жыл бұрын
Hello, I have a 115 Volt AC Pioneer mini-split in my tiny house and it can be used for cooling and heating. Can a DC unit also be used for heating and cooling OR is it just for air-conditioning? I am just trying to learn which system would be better (AC vs. DC) when going off grid, using solar panels and batteries. I will also be doing a van conversion in future and looking for a very small air-conditioning unit. Thanks
@ericmason62233 жыл бұрын
These are marine units that pump water from ocean.
@MabruPowerSystemsINC3 жыл бұрын
Our units are all reverse cycle so they have heat but as crouton said, this particular unit was designed to be used on boats so it is water cooled. We have an air cooled option in the works but it is still in the developmental stage.
@liemarposter11749 ай бұрын
i ask For about Psi? And amper i hope you recive My comment
@user-bj8ke7zx1z7 ай бұрын
70.000 btu: frigomar 5 amps.. then 3 to 2
@MabruPowerSystemsINC7 ай бұрын
The spec sheet online shows 17A @ 230v www.frigomar.com/en/products/single-phase-chiller-unit-inverter-bldc/ unless you mean running it in eco mode which would not produce 70,000BTU. In addition, you are not counting the raw water pump and the circulation pump that need to be running which draw at least 3A each and the air handler(s) that are distributing the air.
@sarahdavilio25755 ай бұрын
1000 watts
@MabruPowerSystemsINC5 ай бұрын
what is 1000W? The inverter is outputting 120v so the 115v unit is drawing 1200W without a pump and the DC unit is consuming less than 1/2 of that
@tapiten3 жыл бұрын
Inverter pulls an amp
@MabruPowerSystemsINC3 жыл бұрын
I can assure you that an inverter pulls much more than an amp in conversion from 115v to 12v but there is also a massive efficiency difference with our 12v units
@bas42912 жыл бұрын
Just get a frigomar
@user-uu1ej7ul8r Жыл бұрын
Ap sy Kesy rabta Kiya ja Sakta Hy please numb send kr deyn main isl sy hon
@hectortorres5423 жыл бұрын
100 amps are you are you really toilet I don't think you know what you're talkin about
@MabruPowerSystemsINC3 жыл бұрын
I don’t understand your comment. Are you saying that you do not believe that a 12,000BTU 115v unit running off of an inverter will draw 100A at 12v? I can assure you that I do in fact know what I am talking about and would be glad to answer any questions that you have.