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  • Post in thread: Trophy Battery Experience

    Where in rural PA? I’m 16156
  • Post in thread: Battery life

    South Carolina I'm afraid. Not idea what the UK situation would be, but they are NATO standard so there is probably a supply of them somewhere!
  • Post in thread: Looking for help wiring up my panels

    Wanderer max PV input is 25V, so your panel is too high. Growatt would need at least 60V from solar to charge 48V battery, so at least 2 panels in series (3 probably better). I would do 2 strings of 3 panels in series into the Growatt. EDIT: I just checked that Growatt spec sheet. Man, I wish I...
  • Post in thread: School Project

    Bought a surplus DOT sign trailer, converted it into a mobile solar powered LiFePO4 system to power our school audio system for concerts outdoors and at venues with low-quality electrical connections. System originally had 8 4D flooded batteries with a PMW controller, all off 12V. Still using...
  • Post in thread: Can I use a 48V Golf Cart Battery charger for this?

    FYI, that Club Car ERIC charger can be updated with a USB disk to a new charging algorithm. There are ones out there that can charge lithium, but it goes to the peak so your BMS will likely be disconnecting regularly.
  • Post in thread: Golf cart headway pack

    I posted my thread after you had yours up. I had made my purchases months earlier, but I didn't want to recommend before finishing and making sure it worked! My biggest recommendation is to top balance the individual headway cells, and IR match them. Don't trust that the initial setup is well...
  • Post in thread: Vent released, and low amp draw?

    Thanks! Switching to good 8ga wire and instantly it went to 10amps. Even good new 12ga with proper ring terminals only allowed 5amp to flow. Any worries about that vent being raised?
  • Post in thread: Flooded batteries for sale; Charleston, SC.

    Appreciated!
  • Post in thread: Vent released, and low amp draw?

    Update after 2.5 years. Pack hasn't been used much, and certainly not tested well. Capacity was lower than expected, Daly BMS is crap, and I didn't know what I was doing when I build this. Here is a picture of the swelling that has occurred. These cells have never been outside of voltage or C...
  • Post in thread: To Tesla or not?

    Yep, that’s how I’ve always done thing. No debt ever except mortgage and while I would love to keep it that way (and pay off the mortgage even faster) my wife gets a say and she wants a car. I don’t want to use $40K in cash, because that’s the emergency fund. So if I’m compromising with my...
  • Post in thread: To Tesla or not?

    Hey all, with the low prices and a much larger paycheck than before I'm debating purchasing my first new car ever. Model 3 is tempting to me even though I've always had manual transmissions and don't love the company/leader. Any thoughts on the cheap "partial-premium" interior vs getting a LR or...
  • Post in thread: JBD Relay BMS for Golf cart

    Anyone have experience with a BMS like this? JBD (same as overkill) 300amp relay BMS. I have used 120A BMS before, and understand adding a separate relay. Just wondering if anyone has experience and has used this with a stock CC Precedent motor and controller. Will be building my own battery...
  • Post in thread: Restart solar system - off grid system

    Yep, just put the good one in parallel with the bad one. I would do it one at a time, and would go low and slow. Like 5Amps. Seriously though, it is almost certain you won't get a good result, and may mess up you PB battery or system.
  • Post in thread: Golf cart headway pack

    Finally finished my pack, using battery hookup “super beast” modules. These packs are 24V each, using 6P8S Headway LiPO4 cells. Resulting pack is 96 cells, total of 48Ah 48V nominal. Using a JBD 300A BMS, giving me Bluetooth monitoring, low temp cut off, and all necessary protections. Club Car...
  • Post in thread: Relay/Contactor based BMS for 48v Headway battery, high amperage application

    There is probably a better way for me to link to this... https://diysolarforum.com/threads/golf-cart-headway-pack.42822/ My issue is after running the back down I will have 1 cell is a pack far out of balance from the rest, so the overvoltage protection triggers often when trying to recharge...
  • Post in thread: Flooded batteries for sale; Charleston, SC.

    12 PD+ (US Battery US8VGCXC2) batteries, 4 Napa 8274 4D batteries, and 4 Interstate SRM-4D batteries. All batteries are between 3-6 years old. Batteries have been on either golf cart charger or solar maintainer every day for their entire lives. Scrap value is $0.25/lbs, so any offer over that...
  • Post in thread: Looking for help wiring up my panels

    This is a great place! Just a heads up, it’s possible you fried the wanderer. It doesn’t have over voltage protection that i can see.
  • Post in thread: BATTERY SELLERS - THE GOOD, BAD, UGLY -- or Jenny (DOCAN) so far so good ...

    I've got an extra 12V BMS (overkill, or Daly) I'll swap you if you want.
  • Post in thread: Restart solar system - off grid system

    Edit: After thinking for a minute I noticed you said these have been drained for months. You will most likely just damage your good battery trying to save these. Take them back for scrap. Where are you located? If it doesn't get very cold, this could be a perfect chance for a salvage DIY lithium...
  • Post in thread: Lifepo4 battery questions

    First, welcome! Next, Battleborn is in another stratosphere for quality and reliability than these Amazon companies. They are not at all the same product! That said, your use case is probably fine for the cheap stuff. I think Amperetime and Chins are ok from what I understand. I would want to...
  • Post in thread: Battery life

    another option, look for a place that sells reconditioned or used batteries! There is a store local to me (other cost I'm afraid) that sell the Armasafe Hawker AGM batteries that the military cycles out. They have them in different stages of life, and are amazing deals!
  • Post in thread: Looking for lifepo4 cells (60-120ah), maybe in NC?

    If Jesse can't use them, I'm in Charleston and interested.
  • Post in thread: Sailboat conversion from 14 hp Diesel to 10 Kw 48V electric motor

    Keimor, Fantastic job, and updates were appreciated. When did you calculate or adjust for trim after removing the engine and fuel?
  • Post in thread: ✅ What’s Better For Van? Two Big Solar Panels or Multiple Smaller Panels?

    You can use some rubber bushings on the mounts to ease some of the vibration concerns. What is your shade scenario? Will you have any vents, decks, racks, or antennas on top of the roof you need to work around? If you are in unshaded parking most of the time, go for the highest series voltage...
  • Post in thread: My LiFePO2 battery caught fire

    thanks for sharing. Tough lesson. Did you 3D print those white holders, and would be willing to share the file?
  • Post in thread: To Tesla or not?

    Always had cheap cars (never more than $5,000), mortgage less than 10% of net pay, completely understand this would be a toy.
  • Post in thread: Golf cart headway pack

    Amps are more for acceleration generally.... Original link no longer for sale: https://www.aliexpress.com/item/3256802906447274.html?spm=a2g0o.order_list.0.0.40d31802dk1k7d&gatewayAdapt=4itemAdapt Original model, different vendor...
  • Post in thread: Eaton UPS battery connector?

    Anyone know what kind of connector this is, and where I could buy it? 48V, 10AWG, F2 on the other end (but I will change to XT60). Model is 5P1500RT Thanks!
  • Post in thread: Golf cart headway pack

    The other thing I learned, holy goodness is the swap worth it! Much faster acceleration, better performance going up hills, no more voltage sag sadness, lightweight helps everything (Thanks Colin Chapman), and I love my storage compartment under the seat. I got back half the cost of doing it by...
  • Post in thread: Relay/Contactor based BMS for 48v Headway battery, high amperage application

    Did you ever finish this? I used 2 superbeast for 48V club car precedent. I went with a 300A JBD bms and am happy with it. Not as happy with the headway balancing….
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