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Most reacted threads

  • JK vs Overkill bms?

    Setting up a 48V 16s2p system. Wanting to do a 200A bms on the system to handle the 6500 watt inverter. I'll never push anything near that, but better to have incase I need later rather then need and not have. Just looking for the basic safety features, low temp cut off, high amp/voltage/low...
  • How to know what way power has to flow for solar breaker?

    I know most situations call for the top to be the feed from your panels and the bottom of the breaker to the charge controller, but how do you know when you do the opposite? Like for my midnite solar breaker, their diagram showed feed from the panels to the bottom and from the top of breaker to...
  • Are my fuses are rated correctly?

    So I think I usually way undersize my fuses, but Id rather be safe then sorry. So I'm reaching out to see if I should keep as is, or up size them. I have 2 48V batteries with 200A bms's. They run to a common bus bars with 2awg cables, then negative goes to the lynx distributor with a 1/0 cable...
  • Bifacial panels worth it on a RV being flat mounted?

    Going to be installing a solar setup on the top of my box truck. It will take up the entire roof of the box truck that is 18' long with a couple inches of overhang on the back end. So it wont have much material to reflect anything to the underside. They will sit about 7 inches off the roof, and...
  • Confused on breaker size for solar

    So I went with the midnite solar breaker and for some reason picked a 30 amp breaker when my system can push 45 amps. I have 4 540 watt panels in a 48V system. Idk why I picked 30 amp breaker maybe I converted using 120V numbers? But either way should I switch it out for a 50A breaker or...
  • Can I make a busbar from 1/0 wire?

    I don't see why this wouldn't be safe but just want to make sure before I go ahead and run it. I have 2 48V batteries that I'm building. Each has 100A JK BMS. They'll be connected in parallel. I plan on doing a snake pattern with them so they can all sit flat next to each other. The bus bars...
  • Can someone review my system before I purchase an inverter please

    So my plan was to use an MPP Solar LV6548 Hybrid for my inverter and solar charge controller. Then I was thinking of using the Rich Solar version instead based off price and I've used their products in the past. I am also considering a Victron system, but I know that would be considerably more...
  • Trying to get my system programmed correctly

    So Im trying to get my system programmed correctly and get my shunt set at 100% at the right voltage. I set my Victron multiplus to charge to 56.8V, but it went to float and my batteries are only reading 54.84V, does that mean I need to set the float higher, or is this their 100% SOC? I set...
  • Want to make sure I'm going to turn my system on properly

    I almost have everything wired up and ready to go. I just need to wire the 2 batteries up. 16 cells for a 48V battery each. They will go to 2 separate 200A JK BMS and a 150 A t fuse each. I know it's under rated but I don't expect to pull more then 100A from each battery. From there to a...
  • Jk 100A bms question

    I'm trying to figure out exactly how my system will be wired together. The bms came with absolutely 0 instructions, so im hoping others here will know the answers I need. I'll post a picture to show what I'm confused about. For the set of red wires not connected, what are they supposed to...
  • 10awg or 8awg wire

    I am running (4) 540 watt panels. 2s2p, it will be 100V at 26A with a 25-30ft run. Might be able to get a little less depending on final locations of charge controller. I used a solar wire size calculator, https://explorist.life/wire-sizing-calculator/, and its telling me 12awg wire at a 1.5%...
  • What resistor to use for pre charge?

    I have (2) 48V 15kw battery packs. What resistor should I be using to precharge them before connecting to the bus bar that connects to the entire system? I also looked for 48v lightbulb and socket but didnt have much luck from amazon, it was all up to 36V
  • Forgot to install t sensor on multiplus, but how am I supposed to with there battery terminals in the way?

    The smallest screw driver I have that does a 90 is to fat to fit and all my thin screw drivers are to long to fit in that tint space between the positive terminal and the screws. Kinda weird design for it....
  • Concerns with my system

    Hey guys. My system has been running great but today I'm not sure what happened. I was away for a couple days and when I left batteries were around 45%. It's a 48V system with 29Kwh of battery. 2 sets of 304Ah. I don't get much solar at all and when I came back it said 100% which I found odd...
  • Does it matter if you plug in the jk bms wires first or attach the main negative cable?

    My JK BMS has a push button for on/off but it didn't come with a manual to explain anything. Ive heard some BMS are very sensitive and will break if you plug in all the 16 wires before the main negative or vise versa. Does it matter for the jk if I was just going to plug it all in the wire the...
  • Having trouble finding 58V fuses that I need

    I'm having trouble finding the correct mega fuses I need to install in my lynx distributor. I can find the right sizes in 36V fuses but when looking for 58V or 70V I can't find the correct sizes, they're all extremely to high. I need a 150A, 125A, 30A, and a 60A. I can only find the 125A...
  • Do you need to pre charge with an Anderson connector? And if you turn the system off?

    So I know you need to pre charge before attaching your second battery cable to the bus bar to avoid the spark, but what about for an Anderson connector? Since that would plug both at once, how would you go about that? Also when you shut the power from the batteries off with a disconnect from...
  • Is this safe for a ground connection?

    Just want to make sure everything is safe before I do it. I have a 48V system in a camper conversion I'm doing. What I need grounds on is my 48-12V converter, SCC, solar break box, Victron 5k mutiplus, and lynx distributor. My plan was to run the ground from the 48-12V converter to the SCC...
  • Should I use a disconnect switch or battery isolator?

    I have a 4 panel system. Each are 540W putting out 49Voc and 12.97A. The system is a 2s2p system. The short circuit is 13.85A, with a max series fuse rating of 30A. I was wondering which of these would be better to use on the way to my charge controller. I was thinking the breaker so if it...
  • Trying to figure out best option for 18'x8' box truck build

    So I am building out an 18' box truck into an rv. The roof is 18' x 8', I want to have as much solar as possible up there, with room for a max air fan. I am going to build a battery from 304ah grade a eve cells, 16 in series for around 15kw. I am thinking of doing (2) sets and wiring those in...
  • Cell 8 and 9 not reading voltage on jk bms

    I have 2 batteries with 2 jk bms. When I plug in my JK BMS the one works fine, the other battery doesn't read voltage on cell 8 and 9, but I get voltage on the clip when checked with a volt meter. Did I get a bad BMS?
  • Victron multiplus Low voltage settings

    What should I make these settings? The default seems way to low for lithium?

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