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    Solar Van Install - Consultant Wanted For Hire

    I’m certainly no solar consultant, but the 3rd company seems like the only one presenting anything reasonable. The others might be capable, but their rrrsponses seem lazy at best and a bit suspect.
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    400w solaria panel on sprinter van

    I considered those. I used their roof adapters for my fan and AC and also got my insulation and just ordered some speaker adapters from DIY vans. They make great stuff. ~$240 for 3 sets of brackets was a bit rich for me and I like playing with metal. I was also concerned about the strength...
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    400w solaria panel on sprinter van

    yeah, I know. I am replacing the regular nuts holding the brackets with some acorn nuts. I'll need to bring some windex up the ladder when I swap them out. I keep telling myself I'll never see it, but I know those fingerprints are up there..... Thanks, I'm trying to keep everything clean...
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    13 kWh Lishen van build

    Thanks. It’s a solaria 400 watt panel
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    13 kWh Lishen van build

    I got my solar panel installed yesterday. I've been top balancing and cycle testing all my packs now that they are sorted by capacity. I have completed the testing on 3 of the 4 and the results are good. No drastic changes after being matched, but a little less issues with runners at the top...
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    400w solaria panel on sprinter van

    I just completed the install of my solaria 400w panel. Pretty tight fit behind the AC unit without overhanging the back, so there will be some shading from the AC at times. The AC is as far forward as possible with the hole right up against a ceiling rib. I fabricated the mounting brackets...
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    13 kWh Lishen van build

    Not a dumb question, you need a special meter to do it. See pic below. My understanding is that these are not terribly accurate on cells larger than 100AH, but it's what most of the vendors use when testing/matching by IR and voltage. I was mostly concerned about comparison between cells, not...
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    13 kWh Lishen van build

    Not a dumb question, you need something l
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    13 kWh Lishen van build

    I finally completed individual cell testing today. 1 cell every 2 days, right on target after 32 days with no issues or surprises. Final results below. Capacity ranged from 282.29 to 288.84 AH. They were all tested using the same protocol. I detailed that in a prior post. Bascially, I...
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    13 kWh Lishen van build

    I don't think the cerbo would prevent another connection, but not sure about that either. I think the only way to prevent open , bluetooth access on those BMS's is to disconnect the bluetooth. If I had a serial connection to the cerbo and could see all my BMS info, that would give me a path to...
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    13 kWh Lishen van build

    Interesting. It looks like it requires a wired (serial?) connection. My bms’s didn’t come with any connection wires, I guess I need something. Need to research. One thing that bothers me a little about the overkill bms’s is that there is no way to lock down access via Bluetooth (except...
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    My new 272 ah Lishen cells arrived

    Sounds like a good plan, but I wouldn't limit the initial charge to 3.45v per cell (I assume you mean 27.6v for the pack, the cell voltages will vary). Charge them up to normal (at least 28.2v, that will get you much closer to full). Your BMS might kill the charge early if your cells are not...
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    Capacity Test on a BB 12v 100aH Battery

    Why did you disconnect the battery at 17 hours? There is plenty of capacity remaining at 12.6v, especially if that was the voltage showing at the capacity tester (which will be lower than actual battery voltage). Just run the capacity test until the BMS shuts the battery off. The battery...
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    Capacity Test on a BB 12v 100aH Battery

    Since you have the battery BMS protecting the cells, the low voltage setting on the capacity tester should just be set low enough to make sure it's doesn't end the test too early. You should be able to see the setting by just clicking through the different pages using the single button on the...
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    Capacity Test on a BB 12v 100aH Battery

    It looks like you are right on track. Assuming the battery hits 100Ah capacity, the test would take 20 hours at 5a. You should have another ~5 hours to go. Once it hits around 12V (per multimeter), it will start dropping quick. What is your setting for low voltage cutt off on the capacity...
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    Van Conversion DIY 560AH LIFEPO4 (EVE 280AH cells and Chargery BMS)

    Nice setup. That top rod is a good idea in a mobile installation.
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    13 kWh Lishen van build

    No progress on battery boxes this weekend. Out of the blue, my van got built and delivered and I picked it up this weekend. I wish I had not been taking my time, now I feel like I'm behind. Oh well, it's all good. I installed a bed in the van today and I'm still running capacity tests on all...
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    13 kWh Lishen van build

    I used ampacity charts that are available online and I went pretty conservative on mine. I'm using 4/0 between my bus bars and inverter, but not anywhere else. I'm running 2 AWG from each battery to posts where sets of 2 batteries will combine. From those 2 posts, I'll be running 2/0 (a run...
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    13 kWh Lishen van build

    It depends on how wasteful we are and how much the sun is shining. If we are taking hot showers and cooking a bit, we could probably get low in under a week, but I really don't anticipate any issues except situations where we run the AC. I don't have plans to run AC on batteries on a regular...
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    Topbalancing help:)

    It looks like he's currently able to charge at less than 1a. If each of those cells need another 50Ah to hit capacity, he's looking at over 400 hours of charging (assuming Amps don't drop further as the cells get closer to capacity). That's asking for a lot of patience. Personally, I'd make...
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    Topbalancing help:)

    What do you have the current (amps) set to on the power supply? I've got the same brand power supply in the 10a version and I think it works a little different than some of the other models people are using. Here is what I see from mine: You can adjust the target (max) voltage or current at...
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    How to rearrange clamped cells after top balancing

    You must be working with different cells than me. My bus bars are absolutely long enough to short across the terminals on my 272 lishen cells.
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    How to rearrange clamped cells after top balancing

    Anything you can do to minimize that risk is certainly good. I stuck red electrical tape with "+" next to all my positive terminals and I have not screwed up yet (knock on wood). The jumpers scare me a lot less than the bare bus bars. There isn't much uninsulated surface area on the jumpers...
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    How to rearrange clamped cells after top balancing

    I went the route of making the little jumpers to allow parallel charging while the cells are oriented (and compressed) for series charging. I figured that if there was ever a time my cells would be swelling, it's when I'm taking them up to max voltage during top balance. I wouldn't obsess over...
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    13 kWh Lishen van build

    I just finished doing individual cell capacity testing on my first 4 cells. Here's the process I've been using: Configured a group of 4 cells in series and charge up to 14.1v Remove bus bars, but keep compression in place Charge the cell to be tested up to 3.62v (goes really quick since the...
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    Tape for Lishen 270ah cells

    I used some 1/16" neoprene tape between cells. It does a nice job of keeping the cells from slipping against each other and also provides a little "give" as cells compress and relax when cycled. https://www.amazon.com/gp/product/B082F37WJH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
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    Fire!! Never cover LiFePO4 with wood!!!

    really like those covers, nice work. This 3d design and printing is really impressive. How hard is it to learn for someone with basic computer (but no engineering) skills?
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    Tracking numbers...is the shipment at the destination port? What is the process?

    Yep, you should see an expected delivery date posted on the fedex site today or tomorrow. You better get to moving that big heavy battery, I'd expect your cells will arrive by middle of next week depending on what part of the country you are in.
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    Lishen 272 Ah Top Balance and Capacity Test

    Used for electrical connections to resist corrosion. Typically used for aluminum wire connections, but some apply it to prevent corrosion on the cell terminals. Aluminum and air don't mix well, results in near immediate oxidation that may not be visible, but will affect the connection...
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    RVs with DIY Lithium

    The multiplus 12/3000 also pre-charges capacitors from shore power. I can't remember if you just need to plug it in or if you have to turn it on as well, but you can definitely avoid the battery pre-charge issue if you have AC power. You might still want to have a pre-charge circuit if you...
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    1 cell spike only when charging?

    A quick sanity check you might try- disassemble the pack and move that cell to a different position to see if you see the same voltage issue. That will confirm whether it's a issue or SOC difference with the cell vs. a bad connection or BMS problem. Clean up the terminals and bus bars when you...
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    4S 272/280ah enclosure suggestion

    Probably a low probability problem, but all it takes is one good knock and road forces/dynamics are hard to anticipate. Maybe a couple wood or plastic strips just a bit thicker than the BMS taped to that side of the box or cells. If there wasn't that metal strip across the top, you could count...
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    4S 272/280ah enclosure suggestion

    Looks really good, nice and compact. In the picture, it looks like the bms might take the force of the battery shifting in that direction as the foam is compresses. In a mobile trailer, the foam will be acting as a shock absorber and the battery will the moving around a bit even with foam...
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    Overkill Soldered Threaded connectors vs pre-attached cable leads

    I think it also depends on your application. I went with the soldered cables, but I wish I had gone with threaded connections and made my own cables. I'm installing in a van and I'm a little concerned that the solder connection could have issues with vibration where lugged/crimped terminals...
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