Hey, this video is basically a rundown of what I learned and the process I went through to replace our battery bank in our sailboat. I couldn’t find all the information I needed in one spot, so that’s what I’m trying to provide here. This is the complete diagram of what I ended up with and by the end of the video I will have walked through the steps it took to get there and provide more in-depth diagrams as well. There seems to be an endless amount of disagreement online about how to do these things and what to do. This seems like a very straightforward situation And I can’t find it anywhere on YouTube or Google that lays it out and explains it well. Oh, I could make a video like that… except I have no …. idea how to do it! [Snappy Intro Music] We are super excited to change our battery bank. it’s been three years that we’ve been nursing the batteries that they told us we needed to get rid of when we got the boat. So we’re gonna put four six volt golf cart batteries in here And I still have to do a little research on whether to get a deep cycle start battery or not. So I’m gonna go and check that out [Music] [Jen] Goodbye old batteries, you’ve served us well. [JD] getting rid of the Spaghetti Factory. What do you think about all this? I’m excited Yeah It’ll be nice to know that after a weekend at Anchor, that the boat will start. While it brings a certain level of excitement and adventure to going out it’ll be nice to know that we’ll be able to get home. Since I had the room I decided to replace this group 27 starting battery with a little bit larger group 31. Running down and labeling all these electrical lines provided invaluable information in getting to know this important system in our boat. By replacing these two batteries rated at a total of 212 amp hours with the four six volt golf cart style batteries at 215 amp hours each, we’ll increase our total to four hundred and thirty amp hours. What are you guys doing? [Ruby] Clean up. It’s day two of the battery bank rebuild and I’ve got to admit. It’s not going as smoothly as I’d hoped. Here’s my book… This is, uh, Charlie Wing. It’s supposed to be the easiest, like really low level, best best book you can get for for this type of boat work. And I’ve talked to people about it, and they say this is really simple, there’s nothing to it. It’s really simple. But It isn’t simple! [Jen laughing] Hi You look amazing. I don’t…uh… I appreciate that. I don’t feel all that great. I think I’ve spent a bunch of money, six or eight hundred bucks, yeh, 600 bucks on batteries and I’ve hooked them up wrong I think, and the boat won’t start. [More laughing from Jen] Bonus new batteries I’m perplexed on wiring and how it all works like much of the boat work I do my battery bank project took much longer than I wanted it to. I took numerous runs to the chandlery for this project, talked to a lot of different friends, found a lot of different articles online and some of the videos I found, I’m gonna share in the links below that I thought were the most helpful. The most helpful thing for me really was drawing out the sketches, the diagrams. Diagram after diagram until I finally figured this project out. I think… I’ll go start the engine now. We’ll see. In the meantime here the diagrams outlining: How to wire two battery banks, one 12-volt starting battery and four six volt golf cart style batteries, in series and parallel. How to wire the Blue Sea Systems Add a Battery Kit 120 A, which includes the 5511e series Dual Circuit Plus Blue Sea Systems Battery Switch, and the Blue Sea Systems ACR 7610(Automatic Charger Relay). Also the Marinco ChargePro Dual 10 Amp Charger, as well as how to connect all the above to the alternator, starter and electrical panel. And hey this next slide should be obvious to everyone. It’s a really good idea to get professional advice before you start doing any of these things yourself. So here’s the way that I learned to connect four 6-volt golf cart batteries in series and in parallel. First off, the top two batteries represent house bank A with the bottom two batteries representing house bank B. First, hook the positive to the negative between the two top six volt batteries, to basically form one 12 volt battery. And same goes for the bottom batteries a positive to the negative between two six volt batteries to form a 12 volt battery. Then I ran my negative to negative between house banks A and B to form a parallel connection and did the same with the positive. I then connected my positive lead to my Blue Sea System Switch on the number one position… the stud at the bottom. At the negative, I took that lead to the negative bus bar. Feel free to pause here for the full diagram of how I wired my four six volt golf cart batteries in series in parallel. AH, and here it is, the finished diagram. A wise man once said, “It always seems impossible until it’s done.” I gotta admit though for all the frustration I did really enjoy the whole project. If you see anything on this diagram that looks amiss, please let me know in the comment section below. But until then here we go… [Diesel engine cranking…AND STARTING!] [Hooo hooo! Beer opening sound] Not a bad way to finish the day. Have you ever replaced a battery bank, did you find it frustrating, or is it just me? Let me know in the comments below, and if you found this video helpful or you want to see me make an ass of myself more often just hit the subscribe button. And don’t forget to hit the little bell beside the subscribe button to get the most current uploads as I put them out!