What do you mean? I thought the vesc already had capacitors 
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Are those battery side or motor side?
What are you referring to? The battery connects to the vesc and that connects to the motors. Iād be moving the vescs closer to the motors actually.
My apologies, missed that. Just be sure the voltage spikes donāt fry your caps (so measure them), and in turn your VESCs. That would be an expensive mistake to make.
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I think Iām missing somethingā¦
Moving the vesc closer to the motors is good, but moving them away from the battery in the form of a battery backpack opens the opportunity for inductance from the long power cables, so it would still be good to be adding (more) capacitors to the vesc input to tolerate that?
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That was my thinking! The caps werenāt specced for long battery cables.
Why would you want a battery backpack?
The longer the wires the greater the wire diameter will need to be for the same load. Either side of the Vesc.
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to create a super portable solution like this
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Cool build but what if you fall on your back? 
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Backs are flexible, and most all proper backpacks (like the one I use) has a load-bearing / stiffening / ventilation sheet between it and your back, so not like thereās no protection. Obviously you also encase the battery in a LiPo charging (fire safe) bag.
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I just meant that in the sense that those 200$+ each rc escs on the back of the backpack look a little crushableā¦ but thatās just me
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Right, Iām working on getting them more integrated, and soon theyāll be mounted inside the zip pouch at the top, which will be zipped open for ventilation during use.
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I think @Chibatterysystems might be able to chime in on the backpack idea since heās been using one
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Isnāt his as an auxiliary pack to charge the one on the board though?
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My backpack parallels to my board so I can use my board alone, my backpack alone or both of them together. Biggest drawback is the board and backpack always have to be at the same voltage to connect them safely.
Been using it for over 2 years
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It doesnāt charge my board, it powers it.
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What do you use against voltage spikes? Details?
@Chibatterysystems they are talking about wire thickness and potential need for extra capacitors ĀÆ\_(ć)_/ĀÆ
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Thankfully I changed bags from that ugly ass bag to an obed. So comfy now.
Originally I was going to use a large cap bank in the backpack, I thought Iād run it without it and see how it went. It works perfectly fine without it, just thick 8 awg wire is enough.
Just to mention, I can and have used it with the backpack alone but I donāt make it a habit and when I do power it off my backpack alone, I donāt gas it.
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My theory on why it works so wel is that there is an onboard battery (12s3p 21700) which handles most of the amp output. I would assume the current comes from there initially and the backpack sort of ārechargesā the board in times of less amp draw
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