My hose was completely broken away. I laminated a plastic hose instead. Not the nicest solution, works perfect since 4 years
Peter, SV Wilson, SM 003, Neustadt Germany

Arno,

Can you explain further the BMS BB communication issues? 

Am I wrong in saying Most drop in sets have the BMS? I know you can make the cells yourself and then add outside BMS but thought the self contained ones all came with them. 

My thoughts  -  Making a custom system and filling the battery box on the SM2k and having a ton of amp hrs avaialable seems easily doable. However, not done the math, but I think financially it wouldn't be that drastic of a savings to where I would want to lets say risk the investment. Everyone has their own risk tolerance. Like a lot of the china made current batts they range from $550-800 where the BB are $850-950. Seems the BB are the most robust and best made so since this is a 15-30yr investment that little amount is peanuts overall.  

Either custom setup or OEM drop ins with the available space I do want to maximize the amp hrs usable. I will be a heavy user for sure and don't want to run the gen. Any ideas or places to research?? 

Thanks, I hope this helps others along with me

Hi Sheriffdep,

It depends what you call a LiFePO battery. But I can tell you without a doubt that the (prismatic) cells you can buy at AliExpress and other sites have no BMS build in.
Having a BMS overseeing the full battery bank is useful for cell balancing. Mastervolt is/was using Chinese Wilson cells in their batteries with a proprietary BMS on top of it enabling it to communicate with other Mastervolt stuff across the Masterbus interface. Very nice but very expensive.

This is my biggest problem with Battle Born batteries. You cannot have sensible interfacing with other systems.
Lithium batteries like to be kept between 20 and 75% state of charge if you have extended charging facilities (i.e. shore power) . The voltage alone makes it very hard to determine the state of charge when a system is at use. Basically you need a Coulomb counter to see the SOC at any point in time. Ideally your BMS should provide you with this information and adjust the float voltage of any charging device in such way it can maintain a desired SOC after bulk charging. Given the different sources of charge you can have on a boat this is not so simple.

Personally  I'm still looking for a BMS that can handle this task without me having to reconfigure everything every time I go out sailing. But I'm on shore power most of the time.

Kind Regards,

Arno Luijten
SV Luna,
A54-121

I ordered 16x270 Ah prismatic cells from China for a DIY system, guess i get them 5-6 weeks from now, That will give me 540 Ah 24 volt, probably go for a rec BMS (compatible with Victron system), will make video and post on the forum when ready. Will take ample time for installations as it is a few cables that I will replace and tidy up when I'm at it. For the one who use drop in, make sure they not only rated to run your bowthruster but also capable in real life, in some drop in the internat cables and BMS are not for high loads. can recommend Will Prowse on youtube very illustrative and easy to follow, he have teared a few drop in batteris apart and had a look what was inside, some of them you do not want to have onboard.
Paul on SY Kerpa SM#259, lags, Portugal sykerpa.com

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Nope, not at all. 

Lady Annila Thank you!
Now I understand, not very user friendly solution, not very Amel at all.
Paul

Paul, to avoid build up, we pump out the bowl fully then flush with  minimum of 25 strokes. 

Thank you for your reports to the forum. I can absolutely support Arno and Mohamad
Our 110-IC is still running strong and has been very reliable with over 3000 hours. Touch wood ;-)

Fair winds
Ruedi & Sabina Waldispuehl
WASABI 
A54-#055

We bought a used Bauer Junior II. 230/50hz. Wired it directly to the breaker board.  We keep it in the port side cockpit lazarette and run it in the cockpit. The coolest, shadiest most well ventilated spot.  They last forever, and are built to be used commercially filling tanks all day every day. 

It is possible. It takes a lot of black words though 😄.

Elja,   I am pretty sure ALL lifePo4 batteries have a built in BMS inside the casing. So each battery has one. You would NOT want one for a whole bank from what I understand. If that were to malfunction then you could lose the whole system rather than just one battery. The BMS is what regulates the charging and making sure all cells charge up evenly. 

I have build up in the hose inside the holding tank. To me it looks as magic, how did the mount that one? Is it possible to replace? How?
Paul on sykerpa SM 259, Lagos Portugal 

hello all, I plan to install a SCUBA compressor to fill the tanks and it will run using my 5.5 kw genset. Looking for recommendations on makes and model from those that have them onboard. 

Hi

We need to put in a new bow thruster motor (Sleipner). We had a Sleipner technician looking at it and sent us a new motor. So far everything looked alright but when our technician loosened the motor and lifted it, the driveshaft came along a bit, maybe 20cm. Now he can’t get it back. 

We believe the original Sleipner shaft is lengthened  just above the gearbox with a keyway (proper English word?) and now the key is somehow disorientated

Has anyone had this problem or tried switching motor without getting out of water?

\Peter sy Maiken A54 #52

Ken
i ask Victron for his batteries a BMS for all batteries
There is my concern if this fails and it is not noticed all batteries damaged if each battery has a BMS is only one damaged.

Elja

Von meinem iPhone gesendet

Elja,

Each LifePo4 battery has some type of BMS. Most are internal. IT manages the charge and draw down for each of the cells inside it. Prevents overcharging, prevents draining the battery, and makes sure the cells are evenly charging and discharging among other things. ALL BMS's are not equal. There are quality issues with many on the market. 

He Ken
So i think shout prevere 24 V batteries with a BMS on each batterie ?? Is it right ?

Thanks
Elja
SM Balu 222

Von meinem iPhone gesendet