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08-13-2022, 01:08 PM #21
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I know, that's why I referenced batteries or cells. But wouldn't it kind of be the same if you are using buss bars to tie batteries together.....you still don't want to put strain on the battery terminals....so you make sure that the batteries all move together or not at all.
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08-13-2022, 01:58 PM #22
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Now I understand your posting.
What I am referring to when I am talking about a "Buss Bar" installation is using cables from each battery to a common "Buss Bar" for both the positive and negative battery terminals. If you watch the video linked above, you will see an example of tying multiple batteries to a buss bar using cables and then running the load from the Buss Bar. Additionally, near the end of the video the presenter discusses the disadvantages of tying all the batteries together with a single metal Buss Bar (like what you are thinking).
I am sorry that my post was not more clear when I referred to a "Buss Bar" installation.
Perhaps I should have included a picture of the type of Buss Bar I was referring to:
Thanks for pointing out my erroneous assumption.
Sorry for any confusion.Last edited by SolarPoweredRV; 08-13-2022 at 02:01 PM.
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08-13-2022, 02:38 PM #232021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
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08-13-2022, 02:46 PM #24
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08-14-2022, 10:38 AM #25
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For what the loads we are running, it really is not that important to keep the cables the same length. If you are are constantly running 200-300A, yes, I suspect that would be important. But who here is running those loads?
There is theory and then there is practicality. If you got 600ah of batteries because you want the capacity to keep your lights on for few weeks, you do not need large cables and exact size lengths. If you are planning on running both A/C's for a couple hours, yes, I suspect you want larger cables and the same length too. The occasional microwave run time will not effect the battery voltages that much and if it does, you got a compromised battery.
Before you jump on anyone's band wagon, think about what is best for your desires.
I am in the buss bar camp with large/short run cables. I want to know I do not have to 'upgrade' if I elect to change in the future.
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08-14-2022, 11:13 AM #26
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If you don't mind, please define length. Reason I ask is, When I installed my system (2 Lion batteries) my run to the bus bars ended up being about a six or so inches different in length. I didn't worry about it because the wiring is 2O full copper small strands high quality stuff. I figured with one at about six feet and the other at about five and a half feet wouldn't matter because of the size of the wires I used. Would I be correct in this assumption?
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08-14-2022, 01:33 PM #27
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2023 Suzuki GSX-S1000 GT+
Excessive Payload is a Wonderful Thing
"If it ain't fast....It ain't Fun"
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08-14-2022, 02:35 PM #28
Depends on if you care about it being perfectly balanced or not.
I have not done the math on your situation, so I do not know the impact. I think it will be small, but it is not zero.
I disagree about the size of the loads being a determining factor as to the benefit of balancing. Even light unbalanced loads will work some batteries harder than others, on the discharge.... And that is only half of the issue. That imbalance is also in effect during charging, which will likely be higher. Yes it is only a 6 inch differnece. But it would have been easy to make it zero when doing the install.2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
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08-14-2022, 06:52 PM #29
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@huntindog
So what you are saying if you have 6 100ah battery's and hooked them up and only took a 1A current on one end would cause enough of a load issue that it would cause you to have a tough time sleeping?
The differences of the battery voltages would even out when the loads are gone/diminished to almost gone. Low/intermittent currents would not effect the batteries so much that it would cause serious issues. Larger/continuous loads certainly would.
As I believe I mentioned before, I am in the buss bar camp but I would not throw stones at someone that purchased batteries for longer run time vs running higher loads and ran them on one end of the battery bank. Maybe not ideal, but not the end of the world either.
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08-14-2022, 07:03 PM #302021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
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Channging Battery Type?
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