BMS Repair - Hi Mads. Looking at the video I believe that the BMS is repairable. If you send it to me I can repair it for you and send it back. It sure would be nice to have a spare on board. I am in New Zealand but can pay for shipping costs as my way to supporting your project. Regards. Jeff.
Electrical Engineer here... there is no standard where things are left to right or right to left on a connector - so that's not it. The fact that you're fully DIY and haven't made a mistake like this in years is a testament to how skilled you are. And I don't know why, but the Danish swearing always makes me LOL. Great work overall!
@@Bluestatesurvival Not with that much damage. It took out a whole bunch of resistors - they were probably resistor dividers for each of the cells. (Or maybe load balancing resistors)
The BMS schematic will show the battery connector with 24V at the top and 0V at the bottom. Most likely when the schematic was made into a the pcb layout, that's the way the connector was laid out. i.e from the pcb point of view it's 24V at the top, 0V at the bottom. From the connector point of view, that's 24V at the left, 0V at the right...
It’s a problem that makes money for the manufacturer. It’s just a cheap design from the manufacturer. They should have added a single diode on the ground. Or uses an asymmetrical connector with a notch, like the ribbon IDE cables in the old computers (I’m dating myself). They know it’s a problem, because they mentioned it in their manual. I would expect similar performance in other places from such a poor component design. Please try a different vendor. You get, what you pay.
This is so special to watch every week, how often does someone admit a mistake and then explain what they did wrong just so the next guy can learn something. Love Sunday's with Ava and Mad's!
... there was one manual Ava didn't read ... BMS ... I only saw it briefly and considering the cost.. it would be worth trying to repair it, as a spare .. an educated guess .. from what I saw they were either diodes or resistors.. for those who don't know, they are really cheap.. what did concern me was all those batteries outputs all next to one another without any fuses.
Don't beat yourself up Mads. Your expertise on SO MANY different things is beyond belief. If you blow up an electronic thing once in awhile in the process of being an expert all things sailing, so be it.
This channel keeps getting better and better. It seems just like yesterday when you dug into the deck core to "fix a few wet spots." So much has been knocked out in the last few years. Athena looks awesome. The wood bulwarks/toerails are amazing. We only use Tung oil on all of our outside wood except for the drop boards/companionway slats. It is a really easy job to oil all the wood on the topsides. I can do it all in a couple of hours and we have a LOT more than you do on Athena. It would take 15-minutes to oil your bulwarks and buff off the excess. Do it every couple of months and it'll be all the brightwork maintenance you will ever need to do on the topsides.
In my view having someone you can really communicate when installing through deck fasteners is one of life's rare and great gifts. May all your passages together be down wind.
Mads, lesson learned on my solar arch is we needed to install a couple of diagonal braces/struts, as when under way, it gets a bit of a transverse sway. Yours might be more susceptible with the extra weight of panels and sliding mechanism + the short radius elbows
Don't forget to regularely thank god (or someone similiar) for your lucky life. An adorable girl, a wonderful self rebuildt boat and the opportunity to live a spiffy life so less ordinary. Fair winds with Athena and you two too.
It is so good that Ava is there onsite for taking part in the decision making. More ideas, different viewpoints and good practice in compromise and negotiation needed in a relationship.
Wow. Just blown away by how the toe rail and non skid look. And a really pacy, fun video too! Thank you guys for giving a great half hour show. Don’t know how you keep it up- but thanks!!!
The toe rail looks pretty dang sharp. Gotta love it when a 4 year plan comes together with the finishing touches - all of a sudden Athena looks like a fetching yacht!
I love the toe rail for all of the reasons Mads mentioned ! Keep it oiled and it will last a very long time ! I you really wanted to use it as a "rub rail", it needs to be thicker, taller and stand out farther from the boat and have many more supports. I think the correct pronunciation is Eee-Pay.
Holy moley!! That toe rail does look like a million bucks! And the Kiwigrip looks great too! Ava and Mads, y’all are quite the team. I just love Sundays. Cheers to jobs well done. 🍻
About those lithium batteries: I was watching “The O’Kellys” RU-vid channel and they had a cautionary tale on wiring the battery harnesses. You WILL ruin your batteries if the wire lengths are not exactly equal. This information was provided by their battery distributor (Just Catamarans). It turns out that if the wire lengths are not perfectly equal, the longer length wires creates a resistance in the circuit and draws that battery down below minimum specs. That kills that battery cell.
We learned that Kiwigrip should be cleaned, just like the rest of the boat, then WAXED with a non-skid wax, such as surfboard wax to keep it easy to clean. There are s number of different non-skid waxes on the market. It really makes a difference. I also found that using the Kiwigrip roller, the thinner the coat, the smoother it will be. Two thin coats will result in a smoother thick coat.
The mark of a true DIY and most every carpenter I've met. Your band-aid is a paper towel and tape. :) Looking spiffy and sure has come a long way. Lots here to be super proud about.
You two are so much fun to watch. You work together so well and the enthusiasm for getting things done has more than doubled. Keep at it and you won't have any problems getting on the deep blue in August.
The thing you do together makes DIY entertainment YOUR THING. Through the years it has always been mostly there... together you have arrived! I will remain quite interested to see where the interaction leads going forward. Bravo!
Liking the Carhartt onesies on the boat. Looking really complete with toe rail! It’s really amazing the distance you’ve crossed to be at this point. Cannot imagine the level of satisfaction your enjoying at this point! Blessings for a positive wrap on your project!!
Absolutely LOVE the toe-rail! Also love that it is above the deck, so no need for scuppers-- brilliant! Now, for the BMS...thing... yeah... I did something similar, once... only, it was at work. And it involved much higher voltages (480 VAC). AND... a big-wig from Corporate just happened to be "visiting" (i.e. INSPECTING) our operations. He was standing about 15 feet away from the MCC for a 480VAC motor I had just wired up and was going to test. Problem: I accidentally wired the motor for 240VAC, instead of 480VAC... and... FIREWORKS!... EXPLOSIVE KAPOW AS THE FUSES BURST!... SHOWERS OF SPARKS STREAMING FROM THE MCC CABINET! The man almost shit himself! I sheepishly approached, like Oliver Twist, and instead of asking "Please, sir, can I have some more?", I merely said: "Um, it would appear that I had a momentary lapse of reason, and mis-wired that motor for the wrong voltage". Ya know-- I totally fessed-up. Plant manager was with him, made a snide comment to me (such a joker... NOT!). As big-Wig completed his pants-check for possible shit leakage, he turned to me and said: "Crusty (not my actual name), let me know if that motor is still good." I did, and it was-- the wires just got a little melty. The main damage was in the MCC and not the peckerhead or motor. The fuses for those things are about 6" long by 1" diameter, and they were basically vaporized! They're full of sand, and that sand was everywhere! I grabbed a broom... So, um, Mads: I think I got you beat, buddy!
WoW! I have been waiting for that toe rail for so long. From planning to execution of the end caps and brackets to the final product was a pleasure to see... and it looks truly spiffy!
Mads, thank you so much for the detailed explanation on making your mistake! Now I will know exactly how to handle the situation if I ever make a mistake! ;) Everything is really looking so nice! As soon as it is finished, I recomment you pull it out of the water and put it in inside dry storage wrapped up so it never gets dirty! Then just animate some sailing stories from your living room table.
I was sure the toe rail was going to look terrible, but boy was I wrong. What a great design, so much better than the AL one. I am constantly amazed at the quality of your work and the ingenuity of your designs. An inspiration to all.
I love Kiwi Grip. Such excellent results at modest cost, and without requiring special skills. However, this comment is really about the toe rail. It's stunning. Great work.
One of the best DIY instructional videos yet. I see Eva adding much detail into describing the work, and this is super valuable. Have a copy of "This Old Boat"? I suggest you might be writing a new version!
Ava has fit in so seamlessly to the channel! I know this a big change in both your lives but it has got to feel great to have a partner-in-spiffiness! I really like the toe-railess look (Sailing Uma still rocks it) but I have to say, I'm impressed with this custom design, and like it more each time i look at it. Interested to see how the stainless holds up over time.
Ipei ("eee pay") is one of several woods called "ironwood" in the New World because it stopped musket balls just like iron. Very well accepted as a teak substitute!
The toe rail is perfection. The Hiscocks did something similar maybe 50 years ago and it seems to me it has everything going for it. And you're implementing the idea in your own unique way. Excellent work.
Athena is looking great. What she may need is a stripe in the groove on the side of the hull. Some color to just break up the white. A "Warrior" stripe. You can always peel it back off later if you dont like. And, having been on a boat that did the kiwi roller texture without any smoothing, Ava better keep all those shoes. Your feet are gonna be raw from walking on rough non skid. Best of luck, cant wait for the next video.
Man that toe rail really does look good, all the time you talk about it and I was trying to picture it in my mind I never could get it to be pretty. But now that it's up I think it really looks great.
Hi Mads, we put 1A fuse in every battery monitoring wire. REC may not like this idea however any unfused wire leaving the battery compartment is a potential fire hazard! Athena looking fabulous BTW :-)
Mads, I suspect the old BMS can be cheaply repaired to have as a backup. It's most likely mosfets that got fried and they are cheap and easy to replace. When boards like that fail it's usually the first component in line that fries, leaving the rest ok! Only caveat is if the component took a long time to fail the excess heat may have damaged the circuit board making repair more difficult! Toe rails look great. I'd give them a coat of oil, not to keep them from rotting, just to keep them from turning grey and not looking as spiffy.
Mads, Make sure all your battery wires from the cells to the bus bar are of equal length. Otherwise, the battery with the shortest wire will draw all the load.
That does not make any sense at at all… also the battery is wired in series so exactly the same current goes through all the cells, no matter what load. All the separate wires from the cells to the bms are for balancing and will not draw any significant load.
The Toe Rail design gives the boat a really great look. Are you going to build a Dodger? If you do, keep your height in mind. My dad had to raise his by 8 inches (cost a lot) but it made ALL the difference. It gave him a spot to sit out of the spray, wind, and sun. Those first few days on passage, having a place outside to sit can be really important to acclimating.
Toe rail look's great. Bummer on the BMS . You both are making great progress toward your departure date . Sad in a way, I've been following these DYI projects and have enjoyed your skill and killing research to nail down the process for each project. All your labor should should result in a reward and it has. Again it's looking great!
After watching your channel for years it's hard to believe you are so close to pushing off the dock. I can't wait to watch videos of your sailing adventures.
Good job on the toe rails...They definitely raise the good looks of the boat...! Top sides could use contrasting colour! Well done as usual Sail Life Cheers
Awesome video as always, i cant wait for you guys to set sail and start exploring the world. Please please promise you will keep uploading new videos when you do!
Mass and Ava, Have you thought about grounding your mast and shrouds in case of a lightning strike? You should also think about setting up your electronics wiring so that you can disconnect them quickly if a strike is imminent. You don’t fry them all. Perhaps installing an ion dissipator may help.
Great video Mads and Ava. Athena's looking good! Having the boat's home country displayed under the name on the transom hurts my eyes! It should be the home port! The BMS really is not all your fault as many other comments have explained. Great you probably already have a replacement in place so quickly. Lesson learned!
