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bunnies!

That sounds like a good option, but good lord, you guys went straight for the kill shot in terms of expense. :) I would place higher priority on Bluetooth comms, at the moment, since I do not currently have victron equipment. I plan to down the road..

What about using a battery combiner that’s intended to mix lead and lithium: https://www.solar-electric.com/victron-energy-cyrix-li-ct-12-24v-230a.html

The batteries are a year old, so they should be in good condition. I can‘t go with a bigger boat, because I already got a stern talking to about just slightly Overstepping my slip size. I rounded down, they wanted to round up. I have ordered a set of 280ah batteries and will use them to get...

Just curious, if you connected The LFP batteries to the L.A. batteries with a high current diode between them, to stop the LA from back feeding into the LFP, what negatives would that introduce?

I would consider a dc-dc converter (instead of the isolator) so that your L.A. batteries can charge the lifepo4 while underway, or while being charged by the ac charger.

That’s what I’m doing. and I’m going to swap a couple of the loads around in the panel.

Yeah, I didnt think that was really a feasible option. Starter bank is already two group 31 LA batteries. When I bump the thruster it pulls that bank down to the 10v range which is barely enough to keep my fuel injected engine running. (It has stalled once.) Alternator is a 70A model. The...

I still don’t see the advantage of that switch. In the best case, switching to 24V will drop my current consumption in half. Every individual cell in that pack would see the same current that it would see if I left it as a parallel 12 volt pack. I would also need 24-12V converter(s) to run...

I’m asking because I’m considering it. Have you posted any details on your setup?

Do you have a link to the case?

I would likely build my own batteries, but I agree with you that a 12V system would be simple and easier to implement. But also, I wouldn't charge these batteries directly from my alternator(s). I would use a 12V - ##V converter just to limit the charge current. So I could charge 12 or 24...

It’s ironic considering the second sentence in this letter from the ABYC president. https://diysolarforum.com/threads/letter-from-abyc-president-re-lifepo4-safety-on-boats.48022/

They are grouped together.

First post here, and trying to learn as much as possible before starting my own build. I like your custom made box, iI just wanted to point out one thing that concerns me. The routing of your b- wire is pushed against your heatsink. Maybe they are at the same potential, but those cooling...

Can you share how many people you think have tried this in their boats?

Has anyone used fiberglass to add a little compression to the cells? Start with the cells at 50% charge, wrap in a few layers of fiberglass, let it harden and then recharge. Not as fancy as the spring compression options, but it should keep the cells from swelling and limit movement. Would...

is there a reason why the lead acid banks are generally higher capacity than the lifepo4 banks? Could you safely do 600Ah of lifepo4 with 200Ah of lead acid?

Is there a way to access ABYC standards as a DIYer?

What all is needed to run a Rec BMS as a standalone system, ie no victron etc integration. I need the following: - bms - contactor - wiring harness - touchscreen or wireless module - softstart module (optional)

This is how I understand it, which is why I don't think that springs are necessary. You want to stop movement, and springs aren't needed. Springs are only needed if you needed to have a constant pressure, but that's not where the benefit comes from, unless I'm mistaken.

Where’s the manual for the Eve cells?

Its too bad these requirements can’t be shared with those of us not in the boat building or repair industry.

what constitutes a “cycle”? If a battery is partially depleted to 60%, recharged back to 80%, is that a cycle? What about down to 75% and recharged back to 80%”

Seems like a great idea to solicit a person to build batteries so that you can pass the litigation off to someone else when a pack takes out a $4M yacht.

The specs don’t list surge current but states to use a battery with 665CCA.

They group them together because there is still the possibility (however slight it may be) of thermal runaway with LFP4, and the way you protect against it is similar Enough to other lithium batteries.

I don’t have a ton of space to carry extra batteries. Particularly in the bow area. I am trying to create one multi-purpose house bank to run all of my DC loads and get the bow thruster off of my starter bank. I can easily run all of my DC for 10 hrs with a single 12v, 280ah pack. I figured...

If you were going to build a pack to power an inverter to supplement your generator, which voltage would you pick and why? current voltages on the boat are 120v and 12v. The boat is not currently set up with a house bank.

The only response to the why not question is that I started out with a very complicated wish list and it was getting overwhelming. So I switched gears and moved towards trying to implement a very basic system and add to it, with the idea that whatever I purchase needs to accommodate the future...