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That's a far point but also keep in mind that as the unit cools the space down, it will also draw less power and in turn, run for longer. We have yet to have a customer complaint regarding our advertised runtimes but do appreciate you bringing this to our attention.

On new installations, we did away with the head vent as it was a complicated run and it was affecting the cooling capacity of the system as there was about a 20% loss that was caused by the addition of that vent. we did not find the need to cut a return between the aft sleeper and the fwd cabin as the air can pass though the door, even when closed. We looked at other duct configurations but settles with the vent up high that blows forward and have had the best results with that configuration. The link below is to a more recent installation. czcams.com/video/7_zoQctTRiQ/video.html

@@MabruPowerSystemsINC Thank you. My installer and I had already concluded the Head vent was not worthwhile. Eliminating that and moving the aft stateroom vent to the other end of the bed sure tidied up the ductwork.

a 110v unit, running though an inverter will draw about twice the power as our DC units. Sure, you can double up the bank but will also need twice the incoming charge to maintain the system running which can work in some applications with plenty of available power but is a problem on most installations.

it cannot due to the size of the sunroof

thank you for the feedback

All have a right to their opinion… but I found the video informative and helpful.* Thanks for the effort man! *not saying I understood the intricacies of the numbers… but learning! ⛵️

Yes, they are schedule 80 pvc

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

thank you!

Thank you Agustin! It's always great to hear the real-world feedback

The issue with chillers is that they are not very efficient in small scale. There are two pumps, that need to run whenever the system is on and the system needs to be able to handle the full load even if you only need to cool 1/10th of the area of the vessel. Variable capacity chillers exist but in line voltage. There is not a DC compressor available that is large enough to be feasible

Danny, both our DC units and our new VI units are variable speed. Our DC units adjust speed based on the difference between set temp and room temp. The 115/230 VI units also adjust speed this way when in auto fan but we took it one step further and have different eco modes that limit compressor speed based on fan speed setting. The 7DC will draw about 18-20A at 12v when just maintaining temp (lowest compressor speed and low fan speed.) I hope that this answers your question

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.

Possibly research hearing aids instead of air conditioner?

Mabru 1st gen LiFePO4 100ah vs Optima Bluetop 66ah AGM

@@MabruPowerSystemsINCdrawing 30 amps or won’t run long unless you have a battery bank that cost more then your dinghy

@@jamiehackney4420 a 12v 460AH ah Battery is available from Epoch batteries at this time with a retail cost of $1,699.00. That battery would run this unit for a little over 8 hours, running at full capacity.

@@MabruPowerSystemsINC However that said battery would require 11.5 hours to charge back up @ 40amps. Solar would take days. So you mind as well save money and get a unit to run off a smaller generator. Just my thought.

@@jamiehackney4420 This unit does not work for all customers but it can fit a wide rage of customer needs. I don't use my personal boat every day and have 120A of charge from my inverter so I can recharge my batteries much faster. Even waiting 11.5 hours would work for my application and many of our customers. To be fair though, you are accounting for 100% use of the battery where the calculations I had done were based on 85% discharge and we would use at least a 60A charger, not 40A so it would be just over 6.5hrs to recharge. Other customers use this unit when their engines are running so they have a very small (100ah) battery bank that acts as a buffer between the alternators and the engines. Most alternators today are at least 75A and most boats looking at these have at least (2) so the alternators have no issue keeping up with the unit draw. It's fair that some customers would prefer to have a generator to run everything and that's fair as well. There are plenty of products available in the market to fit those needs. We prefer the simplicity and reliability of the battery powered systems rather than dealing with the noise, maintenance, and dependability issues of modern generators.

@@MabruPowerSystemsINC I am editing my original remarks because after checking, lithium prices are continuing to fall so the dollar cost of batteries is dropping. Maybe 460ah is enough but I am skeptical. And 12k is not much on a boat in warm/hot summer water. Would love to see 8 hours testing in outdoor temperatures where the water like we have here in Charleston hits August 95 degrees. The WATER! Still like I said I applaud your efforts. 12v compressors are probably the way to go. And combined with lithium or some even better battery technology may get us there one day.

Matt, we certainly understand your frustration with price but this is a very expensive unit to produce and not intended for the market of a $6,000 boat. Please let us know if you have any questions.

Keith we do not have a self priming option and do not have any recommendations at this time. Is the pump in question running off of 115/230v or 12v?

@@MabruPowerSystemsINC 12v

@@keithredmore9473 I've heard of customers using salt water wash down pumps but they are not rated for continuous use as far as I know and they consume up to 4x the energy of the pumps that we include with our units

@@MabruPowerSystemsINC thanks, I have being looking around for pump alternatives, had not look at the wash down pumps. That might work, as our AC is only used for short periods of time. Appreciate the help.

We can deliver worldwide. Please sent us an email to sales@mabrumarine.com

Seriously

He was honestly demonstrating the (relatively low) operating sounds…

Thank you. We strive to keep our installations as clean and user friendly as possible.

Thanks Bill! Yes, this is the 17vfd and at full speed we consume about 20% less. The other difference is reduced temp fluctuations and no peak starting amps. We can run this unit with no issues at all off of a 2000w inverter. I had a hard time starting a 12k standard unit without a pump connected to a 2800w inverter for reference. This does not take into account the amperage difference when the unit is just maintaining a set temperature. I’ve seen as low as 300w draw on this one

We do not have anything 48v in the works. We do have a new line of AC powered inverter type self contained units that we believe will be a better fit for the higher voltage applications.

Mike, we apologize about the sound quality. You can reach out to us by email with any questions that you have: sales@mabrumarine.com

This boat was one of the last vessels that we did with our 120v units running off of inverters and powered by AGM batteries. We didn't have the technology available at the time that this installation was done.