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@cinergi IIRC, your battery cells are setting on Series 10, 1x2 aluminum extrusion without anything under the cells. Have you noticed any wear on the cell bottoms during any of your battery inspections?

OK. I thought I had read all of the existing threads on the JK BMS units. Nope! Since I posted this I have spent a few hours reading some more. :eek: Thanks to many, many folks for sharing. If I understand what I read correctly, the HEAT option may be less than useful at this time. The HEAT...

I am building two 16-cell, LiFePO4, 280AH, 48V DIY batteries. They will be part of a system that will include two Victron Quattro 48-5000 units (configured for 240V split-phase), some solar panels with MPPT SCC's, etc. The system will be installed in a motorhome. I will have connections for...

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Here is one in the Resources section. https://diysolarforum.com/resources/eve-lf280-3-2v-280ah-product-specification-version-e-2019-7-5.15/ This is for EVE LF280-72174. If you go to Section 3. Drawing, you will note that they list two different thicknesses. Thickness (30% SOC) 71.5+-1.0mm...

@cinergi Thanks. The Release notes was the missing piece of the puzzle for me. Yes, it was mentioned above by @Fast1one. When you mentioned "spliced in my SmartShunt" I thought there was something else I needed to do. Using Victron Connect, with their update, is new. @Lt.Dan Thanks. I had the...

Where did you find info (e.g., a wiring diagram?) for doing this? Is there a Victron document or other info that covers this? I am finalizing my design and this would be helpful. Thanks.

As part of this upgrade, I am replacing the existing 120/240VAC load center in the RV. (See diagram in Post #31.) I have some questions about what type of Circuit Breakers should be used in an RV application. The original panel and virtually all of the original wiring and receptacles are being...

It has been a while since my last update. I have been busy with the motorhome remodel. Currently the interior of the coach is pretty well empty. The lack of all appliances, furnace, furniture, flooring, cabinetry, shower/tub, plumbing, etc., etc. is actually making it easier to see how to...

What advantages come with the Quattro II over Quattro? What I am reading (probably not complete) is that Quattro II will comply with ESS and stringent European grid codes. Evidently Quattro does not meet those codes?

What if you added a second shunt in your system? Install it on your 12V battery that supplies the 12V RV house loads. I'm not sure how a second shunt would tie into the Cerbo. Or, even if two shunts could be fed into a Cerbo. But, maybe a BMV-712 shunt that only sees the 12V house system could...

I just remembered I have a photo from an intermediate stage of my prototype design. This shows the end plates at the spring end. Using the idea I mentioned above, the far end (not shown) would be the case itself. And, the rods in the photo would be shortened, of course. I am also considering an...

I am working on a design for my DIY batteries as well. I am using springs as part of the design. So, I need to have the cells move independently of the case. I found a video that gave me an idea. I can attach the rods to one end of the case, but not the other. To illustrate this, let me point to...

Thanks. I did remember you mentioning the inaccuracy of DC usage some time ago. But, I could not remember the details. Thanks for the explanation. I am still working on my coach remodel. My electrical plan includes a BMV-712 shunt and a Cerbo GX. I believe that will give me the readings and...

@cinergi Question: Is the "DC Power" on your vrm a new addition? Does it report current 12VDC usage (RV lights, water pump, etc., etc.)? Or was it always there, and I never noticed? :confused:

My motorhome has the same issue with the metal window casings. 130F is pretty accurate in the direct sun. I am considering painting the exterior part of the casings white (or whatever light color I might paint the coach). I am also considering ceramic window tint. I seem to remember that ceramic...

Lowering the bathroom floor would be a major undertaking for my coach. Even if there is room below (which I do not think so on my coach), the bathroom has a full fiberglass tub/shower surround from floor to ceiling. I.e., it is enclosed on 5 sides with a single fiberglass unit. It will be much...

Thank you, @cinergi . The coach is 38' long, with no slides. I am adding to the insulation, but it does have single-pane windows. Given your comment, that definitely leads me to an ODU of 24K. The back bedroom (very small space only big enough for a queen bed) will get a 7K IDU. The only...

The minisplits and new Victron equipment have not yet been purchased. I am currently working on the interior remodel such as upgrading plumbing, wiring, cabinetry, flooring, insulation, etc. I am staying with 12VDC and 110VAC for the coach interior. Therefore, the choice of a 24VDC vs. a 48VDC...

Thank you. That is very helpful. :)

Thanks for the photo. While I am waiting for my cells, I am using my Ender 3 Max to start printing some of the case pieces. Do you have any photos with the 4 top covers removed? I would like to see how you ran the BMS wiring, please.

@cinergi : I wonder how well your system will work if you use the minisplits for heat instead of the propane furnaces. It would be an interesting test at least. :)

Do you remember where you saw this? Or, have a brand name that I could search? A horizontal condenser may solve some issues for my future minisplit install.

@cinergi As you might have guessed, I have been following your project and using it as one of the inputs for my own motorhome. Currently it is a block-diagram only, as seen in previous posts in this thread. Feedback from you and others have helped me improve the design. Thank you. :) Since...

Obviously I knew it was working; yours has been working fine. I asked because I could not find anything in the sales literature from LG. However, someone pointed me to "Submittal" documents that have much more technical information. And, presumably these documents are written by engineers. (y)...

I am still in the design phase for my remodel. have four questions for you, please: 1) Double-checking my design, I have two Quattro's together supplying 240VAC. The LG minisplit outdoor unit spec sheet says input voltage should be 208-230VAC. I noticed on your VRM it says "120.0" and...

OK. I am now on version V0.6. :) Thanks to everyone who has commented. A lot of thought and additional analysis based on your input resulted in changes. The big change is having a 48V battery bank. I am not certain of the internal configuration yet that I want to use, but it will be comprised...

Think about "pipe clamps." Or, at least the concept. Position a piece of unistrut (or some other long piece) across the 8' width on top of the container. Then, extend a piece of something downward at each end of the unistrut. Think of an open "C" facing downwards. Then some screw-type devices to...

Thanks for the link. In my case, the leveling system is powered by the chassis batteries with the ignition on. Evidently some other motorhomes do it differently. I never gave it much thought. Also, my motorhome does not have slides (another power hungry use). I have also eliminated the 12V RV...

Good question. So, I did a bit of experimenting today. My motorhome has two separate electrical systems. They are labeled CHASSIS and COACH. There are two switches inside the coach (hidden inside an upper cabinet). I believe some folks call these "Salesman Switches." Each controls a relay: One...

I saw an idea that may be of interest. It uses a combination of standoffs and aluminum struts. I am copying the link to a 24 minute video. But, no need to watch all of it. After a short intro (45 seconds) you can watch next 30 seconds or so and probably get the main ideas, then decide if you...

From my experience with remodeling a couple of RV's, WHITE wires are used for GROUND (negative). Just about any other color was used for 12V HOT wires. Note that these are for the HOUSE wiring. Also note that each circuit (all the wiring associated with a single fuse) had a unique color. So, if...

Update: Since my last post, I found that I made an error while evaluating my existing on-board generator. When I tested the voltage output (at the breaker panel at the foot of the bed in very cramped quarters) I found 120VAC between each leg and neutral. I also found 0VAC between the two legs...

Yes. File -> Export -> PDF

@cinergi : Thanks for the note about not needing balancing on a single 120VAC leg. The Datasheet for the Victron Autotransformer (AT) includes a diagram for load balancing stacked inverters. Clearly my diagram has only one inverter, so it is not stacked. :rolleyes: I made the change. The...