Dan,
On Sep 12, 2018, at 18:53, DAN HENNIS dhennis@centurytel.net [electricboats] <electricboats@yahoogroups.com> wrote:
I'm not familiar with the NSB series. I went with the SMS series because they are pure lead, and the larger cases means that you get more lead and less plastic case. The 480 series is the best for packing the most lead into a case. See: https://www.northstarbattery.com/productsI get mine from a supplier that services the live entertainment industry. I was not aware that these live shows like when super star (XXX) goes out onto an open air arena, that there is grid power, but a backup system running in the background. They have thousands of watts running in mirror just in case the power is dropped, you, the audience does not know the difference. All that power is serviced by huge battery banks. In my case, the supplier has chosen these to meet the need and make the super star happy, ... consistently.They told me that the SMS 480s seem to work best on their side, but have stage crews that use them in all the configurations. I know there are a few folks that have had bad experiences with AGMs, but I doubt they were using these. The engineers specifically designed them for Transportation, Marine, and of course, concert backup systems. There are others like the "Lead Crystal" and of course the highly touted "Teslas". But my research is the hear, now, and the most bang for my meager buck. And, ... the factory is just 65 miles away!As you know, AGMs if properly built, can be tipped as in a listing hull. If you have the room, the next best thing in the AGM world, is the 4D or 8D "grader" batteries. It has been my research, that you want the most lead available below (or beside in the case of lay-downs) the post. The 4D and 8D are a lot of lead, but more spread out. And they are in the neighborhood of 200# or more each for a good one. That can be hard to get through a passageway of many sailboats.In my case, I have enough room to lay them 2 high and 2 wide under the center decking. I have 2 sets for each of my 2 ASD (azimuth stern drive) drives. ( if you want to see more, you can see my building blog at: ozarkcustomboats.com). I am getting ready to update it from the summer.Dan----- Original Message -----
From: Chris Hudson clh5_98@yahoo.com [electricboats] <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Wed, 12 Sep 2018 21:55:39 -0400 (EDT)
Subject: Re: [Electric Boats] Battery replacementDan,
Thanks for the info. Is there a reason you chose this NorthStar battery over the one I referenced, NSB 210 FT Blue+. Is this better for electric drive applications like ours?ChrisSent from myPhone
On Sep 12, 2018, at 17:27, DAN HENNIS dhennis@centurytel.net [electricboats] <electricboats@yahoogroups.com> wrote:
Chris, I am finishing up building an electric boat. It is not as big as yours, but due to its mission I will have a system similar to yours. In my research of all the battery options, I have settled on the NorthStar AGMs also. I feel they are at the moment, the most cost effective and heartiest. I am using the SMS-AGM 480 series battery. Being made of pure lead, and the AGM tech, I think they will serve the best. These taller, thinner cells, neet my need and I do not waste a lot of room in cell shells (battery cases). They work in all 3 axis, and I get them from a supplier just 20 miles from the factory in Springfield, MO. If you will look for a local supplier, and talk to them, you can usually get a healthy discount from the MSRP. Yes you can get other options. But when weighing the cost, shipping, and real-world life in your application, I think NorthStar is a great choice.Dan----- Original Message -----
From: clh5_98@yahoo.com [electricboats] <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Wed, 12 Sep 2018 15:19:12 -0400 (EDT)
Subject: [Electric Boats] Battery replacementHello group,
I'm shopping for new batteries for my sailboat. I currently have 16 Trojan T-145s in series parallel. 520aH total at 48 V. They have served me well and will soon be 6 years in service. I'm wanting something in this capacity, but in a more maintenance free design. I have been reading the various battery postings from this group with interest. I have not totally ruled out LifePO4, but I have concerns with BMS failure, charger integration and, of course the initial cost of a system in the capacity that I require. I forgot to mention, my boat is a Morgan Out Island 41. With my experience with this boat and the smaller size of my generator, I don't want to reduce capacity much. The other battery that I am considering is the NorthStar NSB 210FT BLUE+. They are essentially an AGM battery with carbon added to allow it to better tolerate partial states of charge (PSOC). One thing that I've noticed with my T-145s is the incredibly long absorption time while at anchor. Most time I just give up trying to get to 100% SOC, which I understand is not good for FLA batteries. 8 of these NorthStar 12 volt batteries (400 aH total) would cost less than half of a comparable capacity LifePO4 (CALB) bank with BMS. I'd like to get some feedback/opinion as to the suitability of these NorthStar batteries for this application, and maybe someone can give me more confidence to make the LifePO4 plunge. Thanks for any help this group can offer.
Kind Regards,
Chris Hudson
--Dan HennisCTR ServicesP.O. Box 25414237 FR 1155Cassville, MO 65625-0254417-396-0228
--Dan HennisCTR ServicesP.O. Box 25414237 FR 1155Cassville, MO 65625-0254417-396-0228
Posted by: Chris Hudson <clh5_98@yahoo.com>
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