Electric SCUBA Dive Compressor Onboard a Small Sailboat [Panda Parts]
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- เผยแพร่เมื่อ 31 ส.ค. 2021
- We get a lot of questions about our all-electric dive Compressor aboard our sailboat. In this video, I will show how we configured the scuba compressor to run on our lithium battery bank.
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Practical and helpful, many thanks!
Thanks for sharing! Very interesting to see your system. We use a gas-engine driven compressor (5hp) which allows us to fill more tanks faster, but I like the simplicity and easy maintenance of your setup!
Ah right on! Happy to see some fellow sailboat divers out there 🤗. Thanks for watching, glad you learned a little from it 👍
Well explained and put together video.. missed your intro music.. its the best intro music on any youtube channel. Was glad to hear it at the end.. but you have put at the start too.. it's the best!
Haha thanks for the compliments! We use the intro for a proper episode, not for these Panda Part things 🥰
Great video! thanks!
That’s a sweet setup! I was curious how you filled your tanks.
I have this exact same compressor and I love it. It came with a 6hp unleaded petrol (gas for you Americans haha) and fills a 12 litre cylinder to 240 bar (3400psi) in around 25 to 30 minutes. I also have an electric motor for it and made up some quick detach mounts for both the gas and electric motor. It takes around 5 minutes to change but its great to be able to the the gas engine in remote locations and then run the electric in my garage.
Forgot to mention when running a gas motor i use a different filter
Can you share how you did the quick detach mounts? I'm running my MCH-6 electric at home but would also like to swap it out to a different motor when taking it onto a boat in the future.
I just made them out of some aluminium bar stock mate and milled them out with my die grinder
That Bauer Jr is a rock solid compressor. I haven't seen one run off of an inverter before, especially one that small. Thanks for showing us that it can be done. My only concern with your system is the RPM that you run your compressor at. It appears to be slower than it would be with the standard 3hp motor, which fills an 80cf tank in about 25 minutes. Slower RPM on the compressor block means that the fan is running slower than normal. I'm curious how hot the compressor gets. The slower speed probably produces less heat, but the slower fan removes less heat. I'm curious which one wins over the other. You have already answered all my other questions. Well done.
With the VFD I can adjust speed as needed. No change in cooling between say 50 and 65hz. I'd say it might run a little warmer at higher rpm, but no actual temperature measurement taken. Ventilation isn't the best in the aft birth in the summer, so I run a little slower. Hope that helps!
I am no expert on this stuff but I have heard of other people using a soft switch with the Single phase motor. The soft switch smooths out that initial current draw that was kicking the inverter off.
Yep, we tried that but still too much. A soft starter I think is what they are called.
I have a Yong Heng compressor on my Catalina 30. Also bought a bunch of filters and Lube-V food grade synthetic compressor oil. All in about 525 US. It runs off the inverter fine, but it is a tad slower than your model I am sure. Mine also needs to be water cooled which I plumbed it into our pressure water system, and it does heat our water slightly but after that it's shower time!!!!
Ah that is so cool! Thanks for sharing your setup 🤗👍
I've seen the Yong Heng used for paintball guns. My concern with them for breathing air use is the possibility of compressor lubrication flashover creating CO in the 3'd stage compressor head. Do you use synthetic compressor oil that resists flashover? Have you ever tested your filled tanks for CO content? I haven't done those tests myself, but I have always wanted to. Those are cute little compressors that fit easily on a boat. A slow fill on a boat is a whole lot better than no fill on the boat, if the air quality is good.
@@jima4656 Never tested. Lube-V is a synthetic food grade compressor oil. The head stays reasonably cool from fifty gallons of cooling water. So properly cooled I would think there would not be flashing at all. The bigger danger than flashover is making sure the proper filtration is in place. Nobody wants to eat the compressor oil, moisture, etc if the filters don't work. The danger from CO is bigger if you have intake air being pulled in from a nearby running fossil fuel engine. The components for everything can be sourced from Alibaba for pretty cheap. The tank fills for me take over an hour to an hour thrity depending on what the level of usage was before, and the tank capacity for 80+ size tanks. Also you have to watch the pressure pretty well, purge water often, and have an auto stop version for safety.
Sensacional!!!!!!!! 👋👋👋 Ganhou um seguidor!!!
Awesome video! Thanks a lot for this one. Did Bauer help you in any way to figure out how to do it? How did you figure it out?
No help from Bauer, but I'm an engineer 😜
This is Great! That is just what a STEM education will net. The ability to be self sufficient and safe! GREAT Video!
Haha heck yes! Glad you enjoyed 🤗
I like your t-shirt. You need an anime version of yourselves like that in your merch shop.
Dang good idea!!!
Fantastic, thank you so much. I was thinking a dive compressor and Bauer told me it's only recommended with an aux generator on the boat which I don't have/want. It also sounds like this is quieter than some of the gas versions which can annoy the whole anchorage. Do you have the normal version or the oceanus/yachting package?
Just the normal version. I would not do the Oceanis, least not for the crazy extra money. Plus it's added complexity. I too was annoyed when all the dealers said you needed a Genset. NOT TRUE! Thanks so much for watching, glad this helped!
That is so cool! I'm sure it is easier, and obviously cheaper, than filling them up at port. Did you do all the wiring and installation of the electrical?
Yep, we do 99% of the work ourselves. Thanks for watching! 🤗
When I did the math on my compressor, I came up with $0.25 for power, $0.75 for maintenance & $2.50 filter cost, per tank fill. The filters are the expansive part. In hot humid Florida, I get about 20 tanks out of a $50 filter before I change it.
Thanks just the stuff I want to know
Haha...we are full of useless boat knowledge 😜
@@OuterPassage it aint useless. Im writing this stuff down. Youre the beginners wikipedia of sailing.
Haha thanks! Just happy to help 😊
I love watching you guys been so since these earlier videos i got a Bauer Jr 2 off craigs list its setup for 230v but need to use it on my Victron Multiplus 3000 so i need to grab a new motor how did you like the one you guys got? Also do you have a list of aftermarket items you bought so i can do the same install? Thanks again guys, and how sick is that Trimaran?
Any industrial motor is fine, they are plentiful. The VFD I recommended is good too, automation direct. Enjoy!
Ahh VFD! You explained it perfectly. Does the electric motor help avoid issues CO issues that might happen with gas powered air pump? (not a diver, just a geek)
Glad you liked, thanks for watching! Yep, no engine, no CO. And way more simple. 👍
Thanks for a very informative video. Interesting stuff. Did you say you had a 3 phase electric compressor , running on presumably 400v ? How is that achieved using your inverter. ? I’m not very clued up on this. It’s about a soft start isn’t it. Thanks in advance.
VFD ran on 230v. Not a soft starter.
Great video. Looking to do something similar on our boat. Is your boat powered by a 110 or 220 system? Also, we have a Victron 5000 watt inverter. Do you think it in combination with a soft start might be able to handle the initial starting surge of the motor?
230v AC. 5KW might do it...but VFD is still the way to go.
Great Video, Thanks for uploading... I'm curious; how many hours of run time are you typically getting before needing to replace your filter?
About 15-20. Spec for the hot climate seems to be about 12. So not far off.
@@OuterPassage I only get about 8-9 hours of run time before I hit my 12 gram limit (and that's in my garage of the relatively temperate PNW). I manually purge the condensate every 10 minutes as well.
Actually I miss calculated, I that is about what we get as well 👍
Good stuff! What model VFD are you using with the compressor? New to VFDs, what voltage is your inverter supplying to the VFD? Is it 240V single phase?
Automation direct only has a few models, easy to pick the one that you need. Right we are 230v 50/60hz (VFD doesn't care). One phase in, 3 out.
Hi bro nice video I see you are using faber tanks too and wonder why you dont use the low pressure 2460 psi tanks .They take less time to fill and are easier on your compressor.
Nice idea. I do think either your pulley size is slightly off or the motor speed not 100%.
A 80 tank is 11.2l in metric. 11.2 x 220bar =2464 litres of air. The junior pumps 100l/min so 24 mins for a tank. I currently run a petrol version and are looking to go electric off my genset. There is enough loads on my Lifepo4 batteries running a full electric galley on my cat so a genset it must be for now. I have 1000w of solar which is not enough in winter in the tropics so I will add another 700w soon.
Right, I don't run it at full speed. 50hz or so instead of 60. But I can run faster if needed. I'm not in any rush 😊
He has a 2hp motor which limits how fast the compressor can fill a tank. The standard electric motor for that compressor is 3hp. The smaller motor requires a smaller pulley to produce sufficient torque.
This is great, exactly what we are looking for..... now only if you posted a link to where to purchase....
Oh yeah, this is all DIY, we aren't in the business of selling these things...though I could with all this videos interest! 😎🙌👍
@Outer Passage Thanks, so you built the 3 phase motor, compressor, and step up controller? Amazing!
This is a great setup, thanks for sharing. It seems however somewhat inefficient on the electric side, considering 12V DC goes to the inverter, becomes 230V, then goes to the VFD in which AC is transformed back to DC to again create AC at a different frequency. Did you look into any VFDs that would take 12V as DC input instead to avoid the 10-20% power losses in the first DC-AC and AC-DC conversions? I understand the setup you used might be the simplest/most readily available.
Studying a bit more how these VFDs operate, I now realize that they rectify the incoming AC signal, therefore creating a DC voltage close to the peak of the incoming AC, i.e. 110V or 220V, much higher than the 12V of the batteries. This high DC is then modulated with a PWM type scheme to recreate AC. So there is most likely no step up that occurs in a VFD, hence the output voltage is roughly equal to the input voltage and the only aspect that changes is the frequency. So your system makes a lot of sense! Again, thanks for sharing
Haha I'm glad you went in depth and really learned about a VFD! They are super common in industry, hence cheap and reliable 🥳
Great video! I never want gasoline on my boat. I can't seem to find your VFD, can you please give me specs or a model number. Thanks! (PS This is your first video I've seen, and I subscribed)
Ah thanks for watching! The VFD is from automation direct. Give them a call and they can sort the right model for your application. But any VFD specd correctly will do. Good luck and thanks for subscribing! 👍
I have a gasoline power Junior compressor. Is it possible to replace the gasoline engine with an electric motor to power the compressor? I assume so but watching your video seem to suggest, you need to start with an electric compressor to start with.
You should be able to replace. The compressor side doesn't care 👍
That change has been made before. But it's not quite as simple as just bolting in a different motor. 3hp is the standard electric motor size for a Jr. The gas & diesel versions run a little higher hp. The gas & diesel versions run 2300rpm block speed from the factory & the electric versions run 2100rpm at the block from the factory. You may need a new pulley to get the speed right. You will need motor controls as well as an electric motor. You will need to find someone who knows how to wire the controls.
You may have answered this before, but what is your compressor and where can you buy one.
Nardi has a 3phase 3hp motor and Coltri has a 3phase 4hp motor for their portable compressors. Would your setup, as is, be able to run either? Thanks for posting.
Yes, you just have to size the VFD appropriately 👍
@@OuterPassage Did you add a DC choke, brake resistor or any other accessories? Took a peak at the AD VFD manual, very intimidating!
No the VFD is the motor control. It's super simple, three wires. They are used all over in industry. Nothin fancy 😉
Did you get this running i'm looking for a motor now have the JR II but need to get a new motor that will work on my Victron 3000w/12v inverter. if you have the contact to your seller that would be great too.
Can you please add some additional information? How depleted are your batteries once you fill a tank. Or fatal energy used while filling...
Thanks for watching! Our bank is 6KW, and in the video I indicated 1.5KW per tank. Shoot me an email if you need some help 🥰👍🤗
Can you please tell us more about your hydrogenator? boat speed, shaft rpm, alternator rpm and output, efficiency ?
Thanks for watching! Above 5.5kts speed, shaft rpm is maybe 1-2, and the reduction is probably something like 10-1. Gives about 200w. Hope that helps!
@@OuterPassage Thank you very much! do you also use it for power as a motor
No, it's just an alternator. But you certainly could replace it with a heavier DC motor and controller for energy flow both ways.
I have a question. What type of Schengen Visas do you have and was it easy to get?
Just the 90 day thing. Nothin fancy 😂
@@OuterPassage ok. I am looking into a 2-5 year visa myself.
Residency is what you'll want to look into then 👍
Yup this will be my problem next year as well when we arrive in the med. My partner has an eu passport but not me 🙄
You have a 2Bar connection or 3Bar on your compressor
2bar
How much was your set up to fill the tanks
Maybe $3k for the compressor and $400 for the 3 phase motor and VFD. Hope that helps!
Can a air compressor used in a garage be used to fill cylinders?
Most definitely not. These are breathing air compressors which are very different than garage compressors. They are also filled to much higher pressures. Having extremely clean breathing air is important for scuba divers breathing air at depth because of the physics involved of breathing increased partial pressures of the breathing gas. A very small amount of CO or CO2 that wouldn't be a problem on the surface can be fatal at depth.
We're can I go an find one?
You didn't show us the valve opening sequence and closing sequence on the tank and the compressor
I thought putting the tank is water was a safety requirement. Do you normally fill without water submersion
That's just to keep it cool to get more volume on the fill. We just fill, let cool, then top up again.
@@OuterPassage Thank you.
Also, the tank's valve has a brass burst disc inside for safety that should pop before the tank itself would fail..."should" LOL
We have the same compressor on our boat but the tanks dont fill ???
Might have to call the manufacturer 😉
How do you store the compressor?
Bolted to the floor, right under our bed there. We just pulled it out for the shots.
I would never do that in a small, confined space.
So that's not the electric motor that came either the bauer.
Correct. Sourced after the fact.
Oh if you’re not doing that then your electric is too small
I hate to say this but stop starting your compressor under an air load you’re gonna ruin it
Agreed! You need to keep the tank valve closed and play with the bleed valve(s) until compressor output is very close to tank pressure, then slowly open up the tank valve as you close the bleed. Turning off is the reverse process, slowly open the bleed while closing the tank valve. When the compressor pressure is close to zero you can shut it down.