FINALLY! The Holy Grail - Air Conditioning off Batteries on our Sailboat

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Our first attempt at running air conditioning off of our batteries didn't work so well, but this unit from Mabru is so efficient that we can run the AC all night long off of our lithium batteries. This week we show the installation on Clarity and compare the watts, BTUs and efficiency of the two units, side by side.
If you want to know more about Mabru: Mabrustore.com
If you'd like to talk to Andre Cormier at Gulf Nautical about purchasing a Mabru, you can contact him here: www.gulfnautical.com
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Опубликовано:

25 июл 2024

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Комментарии : 564

@user-dk2nh6gx2v 2 года назад

*This unit works like a charm. Keeps my rv 21 x 41 very **Fastly.Cool** . I recommend to anyone that wants to keep a rv cold without having to turn on the main a/c.*

@mattsb99 2 года назад

Wow! Huge difference, which in my mind, is a bargain for the additional cost. I love the tech shows and how well you present what can be a complicated topic. Really impressed with no bloodied knuckles or French! Thanks!

@PanzerDave 2 года назад

Thank you for your very detailed video. Unfortunately, you have given me yet another project for my boat. When I first bought my boat, I had images of just sailing, entertaining friends, visiting exotic locations. Now I have fun things to do like add this air conditioner, upgrade my wiring to handle the new batteries I will need, etc.! Thanks for the video. Fair winds!

@marklapierre5629 2 года назад

Thanks for the great tip on the A/C unit. I'll certainly be looking them up when I'm refitting my boat.

@scottbraddy2340 2 года назад

This video is right on time. I'm about to buy a 56 Formosa and I will have to replace the old a/c unit. Talk about perfect timing. Thanks guys.

@UKlelegirl 2 года назад

Love your videos- great job detailing the switch to a 12V HVAC system. We just finished installing a 16K BTU Marinair in our 34’ Fountaine Pajot power cat. Very pleased compared to the old Mermaid air I had. Features of the Marinair unit are similar to the Mabru (except runs on 110V AC). It has variable speed fan and auto setting. Also has humidity sensor. Cools the whole boat pretty fast. Price was $1900. Hard to beat that. We dont have solar. So we use a Honda 2K generator when on the hook. Not quite as nice as solar/Li battery set up. We have 4 100 amp AGM batteries - not enough to push the Marinair. We do mostly coastal cruising around Florida so system set up works for us for now. Maybe someday we finally go for solar/Li.

@julianbatcheler9970 Год назад

For me, the single most useful boat video on here. I aim to buy a boat in the next few years and for me AC and heating are a must. In fact I have decided I'm happier with a smaller monohull if I can kit it out with: water maker, hot water, heating, AC, a freezer and electric cooker. Murdock was the best!

@the_ayesha_khan 2 года назад

Great vid guys. Nice to get back to some sailing content. Really learnt something here too.

@IanB22 2 года назад

Great video - really unbelievable amount of efficiency and the best part, it will actually be cool / warm the entire time you need it!

@TheOKellys 2 года назад

It’s amazing.

@vinceperillo6802 2 года назад

Another great video love the technology information that you guys provide.

@carsonc1272 2 года назад

Awesome... I've always wondered if there was a bit more that could be done on the AC front.

@kjelpeterson5236 2 года назад

Yet another top notch episode. Thanks guys!

@pirateracer69 2 года назад

great editing explaining something not so easyly presented. Loved it.

@StephenWalkerAhoy-Boats 2 года назад

Another great, instructive video. Thanks so much. You inspire confidence. I may well be looking to install AC before summer as it gets really hot in July/August in Greece!

@bearparts 2 года назад

I love coming here to learn. Great vid!

@phonemail1367 2 года назад

Excellent, cudos to Mabru for an excellent product!

@pbertf24 2 года назад

Great review guys ! Thank you

@BH195829 2 года назад

Amazing! Sharing this with my Sail friends!

@Planzman1 2 года назад

Getting boaring😉 with all these excellent shows, you set the bar at a new level each week, and always look for my o’kelley fix each week! Great find!

@TheOKellys 2 года назад

Awww, thanks Mark

@Enrage13 2 года назад

A one-time cost of $3,200 for all-night cooling on batteries on a hot, sweaty summer? Sounds like a great investment, especially when you want to limit your diesel use!

@donjohnston3776 2 года назад

It costs more to talk about it than the money spent for sure. It doesn't pay to be cheap.

@eksine 2 года назад

$3200? he said it was $5300

@williamcrowley5506 Год назад

Worth every Penny

@yaa63 2 года назад

...wasn´t expecting it to "come with an installer"...THAT WAS SO FUNNY!!!!!...thank you for your videos...always very instructive.

@trevorward9680 2 года назад

Great video, thanks guys.

@burtoncarlisle4810 2 года назад

Very cool, just started watching your videos. Thank you for sharing:-)

@RoySATX 2 года назад

I'll never be able to afford one of the batteries shown near the start of this video, much less a boat to put it in, so why am I watching this video about replacing an expensive boat AC unit with an even more expensive AC (and 2 gauge copper runs, no less. Seriously, 2 gauge!) ? Well, aside from me being odd, it's because you two are always so cute together and seem so genuine and approachable. I guess it's the same reason people root for the underdog to prevail in sports, because where there are winners and losers you at least hope those that win are good people deserving of the win.

@mark- 2 года назад

I am impressed, well done ✨😊👍

@rosegoldlifehacks 2 года назад

Great video! If I had a boat I would install it for sure! 👏🏻

@3DProspecting 2 года назад

When you sell that behemoth of a generator it will offset the cost of the upgrade even more. Totally worthwhile upgrade. Well done.

@Parr4theCourse 2 года назад

Love the: 'Mike Patey" move - HA! Only aviation geeks will get it!!!

@TheOKellys 2 года назад

Let’s get back to work! Lol

@Parr4theCourse 2 года назад

@@TheOKellys Ha, ha, ha!!!!!

@clausgiloi6036 2 года назад

Don't go ground looping Clarity :-)

@donjohnston3776 2 года назад

The catamaran world needs a Mike Patey

@Parr4theCourse 2 года назад

@@donjohnston3776 You got that right, just image the innovation that would come from him and his brother!!!

@jimkennedy7050 2 года назад

I used 12 volt fans and a damp towel on my live on sailboat during hot summer nights. The fresh water deck shower was very helpful.

@johnvanderburgh4502 2 года назад

thx for the great vid ! happy sailing !

@bill2292 2 года назад

Absolutely AWESOME video!!! You killin it

@TheOKellys 2 года назад

Thanks Bill!

@patrickmckowen2999 2 года назад

Great vid 👍 Need a shake up in the RV and camper market as well. Cheers

@carlosvallejo4926 2 года назад

Hello my dear friends, how are you both doing? Such a great video. I learned so much about ACs in a boat. It is so important for so many people. Thank you for the information. Wishing you a great trip out of Annapolis. Cheers from Canary Islands.

@TheOKellys 2 года назад

Hello Carlos, so great to hear from you! We are doing great and hope you are too!

@cowboyrolo1 2 года назад

Great video, love the Mike Patey reference!

@5VABrowns 2 года назад

Thanks for posting this video. As I start in a refit of a 35-year-old trawler, I am looking for the latest technology for a 1400 Ah LiFePO4 battery bank. This is awesome as my wife and I always love our cool sleeping cabin but are looking to live off-grid as much as possible.

@holymolar 2 года назад

Sounds fantastic for off grid homesteading in Brandon Fl., combined with aircrete insulation and appropriate volume, P × V = n R ×T . Thank you for posting.

@genghischuan4886 2 года назад

lets go brandon

@dmorgan28 2 года назад

What a cool video. It really was about being cool. No pun intended. Lol. It was a great video. What a great comparison of the ac units. Thanks 👍👍👍❤️

@kptbillburkett8735 2 года назад

Thank you for the a.c. update. Glad to see 👀 this stuff working. So head south as fast as you can so you can use it. And give a report on how it is working. 👍 ok. Until next week Aloha from the Big Island 🏝 of Hawaii 🏝. P.S. where it is summer all the time ⏲

@TheOKellys 2 года назад

Oh man! We are ready!

@dc1544 2 года назад

now you done it. cooling and heating. That is awesome.

@Total_Egal 2 года назад

pretty sure the cooling was the goal.. but the heating will come in realy handy some cold days and will help stay longer on the boat in the off season or between

@davewilliams639 2 года назад

A very informative video...Thanks

@mikehill4940 2 года назад

Great upgrade. That thing looks like it’s 10 times the machine of the old one. Quality is worth the money not to mention the efficiency

@TheOKellys 2 года назад

Agree with you there!

@tunamaniak 2 года назад

Ooooh yeah: Love it when I have to pause your video because you just mention something new. Like a 12 Volt Air conditioner.

@scottseaman6247 2 года назад

Awesome video!

@waynemcphail7825 2 года назад

Excellent video!!!

@mikec7179 2 года назад

Mr. T was the MacGyver of the A Team Lol I frigging love watching you guys!!!

@warwickchristian5682 2 года назад

Great ac unit....the fact that it is also reverse cycle as well is awesome..!

@TheOKellys 2 года назад

Thank you! We need it right now it’s chilly in Virginia!

@NorthPoleTime 2 года назад

Great info! Thanks

@FatherTech 2 года назад

I got the Mike Patey reference. Forgot that Nick is a pilot. Flying cowboys are a great crew.

@kaywarren6788 2 года назад

Wow, what a difference!

@doogl2331 2 года назад

Great find and the extra expense up front pays off on the longevity side. Even in a house furnace, an ac fan will cost $300 per year to run where as a dc fan will cost $30 annually, again more expensive up front but over 25 years way cheaper. Well done.

@TheOKellys 2 года назад

Had no idea!

@deankoch7305 2 года назад

A ductless mini split is way better and way less money. They are so inexpensive you can afford to replace them every 2 years. A 21 sear 110volt uses 4 amps running and around 6 amps starting and under full load.

@MarkHerndon 2 года назад

@@TheOKellys I may be wrong on this but I suspect the difference is due to not having a transformer involved transformers are big time energy hogs.

@scarletbegonias2359 2 года назад

Very informative, thanx

@PopsGG 2 года назад

Great video. I did notice in the video you appeared to be recording the BTUs from very different locations. The old unit you seemed to be measuring 4 to 6 inches away from an exhaust. For the new unit it was being measured inside a sealed duct directly at the AC unit. But in the end if the power draw is lower and its sufficiently cooling your space, that's all that really matters.

@TheOKellys 2 года назад

Yeh plenty of errors, that’s why I said even if putting out full btu, it’s still half the efficiency in the dometic. But good eye!

@andrecormier3953 2 года назад

The probes were different . Anemometer in old AC shot the one in the duct of the mabru was a temperature probe measuring outlet temp.

@boatrx 2 года назад

Great work Andre!

@TheOKellys 2 года назад

Da man!

@andrecormier3953 2 года назад

Thanks Phil!! Your work inspires us. Look forward to collaborating with you in the future.

@fred6319 2 года назад

enjoy your warm night

@obieandlaurie 2 года назад

Great thumbnail, Nick and Megan! Received MORE OF YOUR COFFEE!!!!!! Life is good! Cheers,

@TheOKellys 2 года назад

Thank you! We got a new shipment on board today too whoop whoop! Thanks for ordering more coffee, it’s so good!

@Coronado-nz7wu 2 года назад

I run into the same dilemma in the trucking industry. Thanks for the video.

@jerrydiver1 2 года назад

In 2010, my new semi tractor came with an A/C unit hard-wired into a 'house set' of 4 batteries, the old tech, wet-cell type. They would run that a/c 10 hours, enough for a truck driver's required rest, meaning that in places like California, with their 'no-idling' law, the truck engine didn't have to run to power the main a/c. That little unit in the sleeper worked great and so my biggest reason for not wanting to go on the California runs went away. Almost forgot: the company supplying those a/c units was 'D/C Cool'.

@mogmogman5476 2 года назад

Also, your AC unit did not require marine water to be pumped up into the condenser intercooler which wastes more battery power. For less than 1/50th of the cost for the sail boat, we use wet cell batteries, a 24 VDC battery system and a single high efficiency inverter for our 5k btu AC unit that cost us $100. By the way our boat anchors in water so shallow that a water intercooler cannot be used.

@sharonbraselton4302 Год назад

ues slbg 8 hiyde soo gid en9ghh

@vroor32 Год назад

Q?: What brand of house batteries were those? Also, were they deep cycle?

@ryhol5417 Год назад

Always beneficial when you’re paying for quality. Copper is an unavoidable but retrievable cost. Sleeping comfortably is priceless

@powercordlabs 2 года назад

Cool. I dropped a Velair 16k btu into my Monohull - which Gulf Nautical also sells. It's a great option.

@itonylee1 2 года назад

Actually, the modern day DC to DC converter or DC to AC inverter are both very power efficient from 95~98%. There are very little power loss during voltage conversion. The main reason that the new Mabru unit is much power efficient than your old unit is because it use variable frequency drive motor, so instead on/off, it basically just slow down. If you can fit the household AC (VFD type) on your boat, it will be quite efficient as well :)

@michaelfoster6 2 года назад

Thank You!

@gmonnig 2 года назад

Love the Patey fist pump! If you like boats, you probably like aircraft and great engineering.

@stellarconstruction7526 Год назад

Really enjoy your vids. Tons of info. Thanks. My wife and I have always dreamed of life on a sailboat. Before we jump all in we would love to spend some time with someone on the water for a week at least to get a hands on experience. Do you know of anyone you could recommend that charters in the carribean.

@RayDCO 2 года назад

Great video as always and in this case bonus points for the use of a cinematic McGuffin :-)

@TheOKellys 2 года назад

And points to you for using McGuffin!

@RayDCO 2 года назад

@@TheOKellys LOL

@johnburkey1135 2 года назад

good vid and timely - see you installed ReLion batteries - I am a big fan of relion based on my research but rarely see on youtube boats. bravo on choice. Also shopping for AC , boat IM buying (4 yr old mono) has AC problems and draws more power than Vegas at Christmas.will def look at your AC vendor

@TheOKellys 2 года назад

We bought those Relions four years. They work just fine, but there are better deals out there now from other manufacturers.

@dianegriffith3006 2 года назад

Love how that camera lens peeks in on your right! Lol!!

@stevej.6674 2 года назад

Brilliant!!! 👏

@LawrenceBroussard 2 года назад

Very Interesting!

@davidfkapp 2 года назад

Mike Patey motion! Awesome! Another DIYer!!

@fredfredrico4917 2 года назад

Good stuff nothin' like yanking out old outdated tech! Many RV's are moving to 12 volt fridge compressors to save on power and work well on batteries that are solar charged. That way you can get rid of propane.

@trevhedges 2 года назад

Cheers guys

@togetherworksemail 2 года назад

Love your videos

@gregorybiggs2068 2 года назад

Amazing improvement! Well done! I know battery technology has improved rapidly over recent years. Is this also the natural result from improved technology over the years or was this Mabru technology available back when the Dometic was new?

@richardc4586 2 года назад

Impressive aircon. Seems to be worth it. All I need is the boat :)

@TheOKellys 2 года назад

Get that boat Richard!

@billvandenouden7302 2 года назад

Yeah yo this gives such great videos that air conditioner is awesome

@armedprophet3321 Год назад

When it’s 90 degrees with 90 percent humidity at night and you are trying to sleep with fans in a small enclosed space 5300 dollars is NOTHING ! Being hot during the day while you are working or lounging about is one thing but a good nights sleep in a comfortable environment is priceless. ❤

@packadrum 2 года назад

The comparison was great how did you get all the data with what type of equipment and app or software. Already told a friend with a cat like yours. I help businesses reduce their HVAC on Roof Top Units (RTU HVAC systems) so this would be very helpful software or equipment. Thanks for the great video and education. Mark

@stephenmiller5308 2 года назад

I'm already subscribed, but Megan really reeled me in on this video with her sultry cover shot.

@pathfindergeorgia1117 2 года назад

Love the thumb nail, kudos to the photographer!

@TheOKellys 2 года назад

Why thankya! The model did all the heavy lifting!

@arturoacosta8301 2 года назад

I enjoy your humor.

@stephaniemyatt8346 2 года назад

Love this! Also love Oregon! Never forget camping on Canon beach with four under five year olds……it’s where the seeds of sailing away were sewn. 😂

@stephaniemyatt8346 2 года назад

That last comment was a reply to another one of your videos…oops. Must say you both are so capable of giving good information!

@TheOKellys 2 года назад

Thank you. Cannon is one of our favorite places on this planet.

@davidspensberger7862 2 года назад

Nice. As we get a little older we do like comfort

@dennisreeves632 2 года назад

Enjoy the cruise to Hatteras, I'll be in Emerald isle NC Nov 6th for a week. A little further south yet.

@larrimos 2 года назад

We adore Emerald Isle!…..Enjoy yourself, we are definitely jealous.

@dennisreeves632 2 года назад

@@larrimos I sure will. Been fishing the Bogue Inlet pier in the fall since the early 60's.

@daviddonohue665 2 года назад

The Mike Patey move. I'm impressed I was just catching up on Scrappy progress. I wonder how many sailors are also pilots?

@andrewjames7616 2 года назад

Thankyou 👍

@mikeavise9422 2 года назад

"Mike Patey" back to work!! love it.

@TheOKellys 2 года назад

Back to work! That guy!

@FrankConforti 2 года назад

@@TheOKellys proof you are a genuine aviation enthusiast!

@johnkeegan6646 2 года назад

Very impressive indeed. You will enjoy the cool without bugs and with NO ENERGY GUILT! Enjoy!

@TheOKellys 2 года назад

Thanks John, so true about the guilt and the morning check in on the damage 🤣

@johnkeegan6646 2 года назад

@@TheOKellys sad to disappoint thousands of no-see-ups, eh?

@kkenneth100 2 года назад

You referred to putting in BTU’s. That is the measurement of heat and is equal to about a match. The definition of refrigeration is the removal of those btus which is taken out by condensing which I would say is likely a water loop under your boat. Water is the best way for the transfer

@rickcreel3657 2 года назад

I got into air conditioning and refrigeration in 1961, and over the years I have a lot of questions about the subject. A water cooled heat pump does not have to be defrosted so it is the most effcient while heating. Look up the Tesla valve; it so simple with no moving parts to wear out, and he got the design in a dream from God. The pride, and joy of his work was the Tesla turbine. If a Tesla turbine/pump pumped water vapor it would be the most efficent a/c in the world. Big brother doesn't want us to know that water is the best refrigerant there is for a/c systems. The higher amout of latent heat of evaporation in b.t.u. the more efficient. Water at 970.4 btu per pound wins the race. The head pressure of a/c systems is about 200 pounds. Water is 14.7 psi. Which would draw the most amps? In a lithium bromide absorbtion system the temperture is 40 degrees F water is the refrigerant. Just marry the Tesla pump to it.

@tomriley5790 2 года назад

Is there a problem with water freezing and expanding though?

@LoanwordEggcorn 2 года назад

Phase change cooling is efficient but water doesn't have favorable characteristics for that in a practical machine. It's not a government conspiracy that water isn't used for air conditioning; it's physics.

@gravelydon7072 2 года назад

@@LoanwordEggcorn Ice A/C works wonderfully. It used to be used on railroad cars. An example of how well it worked, take an 85'X10'X10' one in the Florida sun. Add 400 lbs of ice to start with. 90°F inside temp at the start and 15 minutes later it was at 75°. It kept it there for the next two hours. And it was good enough for US Presidents from 1942 to 1959. Local power company office building makes ice at night and uses it during the day. Saves them a batch of money.

@LoanwordEggcorn 2 года назад

@@gravelydon7072 How would that work in the middle of the ocean where there are no ice factories or power companies? P.S. The ice factories at that time used refrigeration like air conditioning to make the ice.

@gravelydon7072 2 года назад

@@LoanwordEggcorn Ships use keel coolers. It can get really cold from them as they can dump large amounts of heat into the water. We used them for cooling out engines at a number of locations. Ice houses used a different type of cooling. Theirs was like the old Servel unit, Ammonia Cycle. You heat it up to cool thing down. And in colder locations, they went out and cut ice in the winter on the lakes and then stored it till needed.

@markgardner8542 2 года назад

LETS GET BACK TO WORK!!! LOVE the nod to Mike Patey!! He is rocking the aircraft world! I do planes too! Sail boats, planes and motorcycles!

@TheOKellys 2 года назад

I got close to buying a Wilga in 2007, so when I came across Mike….the MAN!

@jcbenson01 Год назад

Amazing. I want one. Can’t afford one or justify one, but I WANT IT!!

@user-ez9ky6nn7n 10 месяцев назад

Great Video on the 7k btu Mabru Unit! Just wondering how the unit performs in warmer testing conditions (like 28 degrees Celsius water and 35 air temperature) in terms of btu output and power consumption? Do the 28ah include the water pump?

@functionalvanconversion4284 Год назад

Awesome analysis, thanks! Could this unit be installed in a campervan? Is there a shroud for the condenser to push the heat outside?

@tomkiefer2386 2 года назад

Love the Patey fist pump!

@evanbetter 2 года назад

haha, love you guys. having that said, the poster image of this video combined with the title could belong to completely different topics. take care and enjoy!

@Tulasendlesssummer 2 года назад

Must show to Billy! Maybe he will finally agree to get one 😂

@TheOKellys 2 года назад

Don’t tell him it weighs 40lbs. :) but worth every ounce on a hot night

@southerncross2001 2 года назад

Nick-Great job documenting and explaining things! I didn’t see the amount of batteries/cost Per battery and the run time you get out of the new unit. Any additional info on those details? Thanks.

@TheOKellys 2 года назад

Should depend largely on temperature, but at full blast, we would use approx 300ah in ten hours, which is one quarter of our bank

@robertlaird6746 2 года назад

I really like Mike Patey and have been following every video since the beginning even though I don't fly. I just find it supper fascinating. He's a very talented guy, a MikeGyver if you will.

@TheOKellys 2 года назад

He’s the MAN. I (Nick) looked at a PZL Wilga many moons ago. Really excited for Scrappy!

@tmyers1492 2 года назад

You are much different than me. AC is definitely a priority especially when sleeping. On my list of priorities a hole in the boat is the only thing on the priority list that beats fixing the AC and just barely.

@markgardner8542 2 года назад

A heater too! Someone is getting lucky tonight!!