@brennan_sfo sorry for being unclear, I mean to tell people not to simply connect up parallel without updating firmware. There will be a compiled firmware available for advanced users that want to run more amps. It would probably be the minimum required for a vespa, depending on the max speed you want to go and still get good power. Try and get a setup with some kind of gear reduction it will make a big difference.
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Your parts had to be ordered already 
100 40Tâs are waiting + 20s BMS + 140kv 6396 motors 
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The VESC 75/300 would do the job big time. We use it on motorbikes at 14 and 16S. 400 Phase amps witha modified heat sink.
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Honestly, I think that the 75/300 is a bit of an odd peg. 300A is too powerful for an Esk8 or ebike and 16s is too low voltage for an eMoto or EV. The only good fit seems to be a scooter or Vespa.
If I may place a wish or two, then I would wish for a
- 30s 200-500A VESC for eMoto and other EVs
- 20s 100A VESC for eBikes And other PEVs
If you wanted to be really forward thinking, you could also look into the 480V space. I know itâs too early for PEVs in that arena, but if you could use J1772 DC Fast charging, you would have virtually unlimited range in most cities.
Edit:
I believe that it would be a smart move for VESC/Trampa/BV to make compact reliable motor controllers for that market. Esk8 is niche. Having an open-source DIY-friendly but bomb proof offering for those far larger markets would ensure the long term relevance of the VESC IMO. And because VESC is OS, I would highly welcome that! Also, note that in the eMoto/EV arena, people are more likely to shell out some extra money for reliable components as at those speeds, you donât want to buy some cheap copy - thus it would also be good for your business.
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Well. Bummer then. Was only going to do 80xx motors at 20s⌠
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I was just teasing you 
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Iâm more stressed about getting a stormcore than coronavirus 
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Haha I can understand 
I heard that he was going to sell some extra after the first 12 
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Only thing missing with using 480V+ is that DC fast charging currently is outside reach for DIy builders. As far as I am aware there is no solution for people to use J1772 on a DIY system, with the communication between a charging point and the vehicle being required. These standards are often closed or too expensive an option to implement, especially for a smaller vehicle such as a scooter. There is an option or two for Level 2 AC charging to work for DIY but I believe that this option doesnât work half of the time
Hacking it for L2 is quite doable, this guy did it:
For DC Fast charging, it might be more challenging, but should be doable as the IEEE standard is now implemented by the majority of manufacturers. 
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I agree on that though. But all it takes is someone to hack it, share it and someone to offer a smart DIY adapter. That will happen as sooner or later IMO.
Another hurdle is the availability of compact high voltage, high current step down converters.
Super happy youâve shown me this video, I didnât realise that the solution would be that easy. Iâm definitely gonna have to implement this at some point
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I assume you are talking about EVs here? Most PEVs donât have a need for a DC-DC converter, and there are some cheaper solutions for DIY EVs such as the DC-DC in the Toyota hybrid systems, but youâre right there needs to be more cost effective solutions here
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IMO they just donât know yet that they need it. ^^
The A123 cells got me thinkingâŚ
What if you had a PEV that can Charge at 10C, anywhere in the city?
You could save a ton on the battery and yet have infinite range.
Lets assume you have some sort of PEV with a smallish 5Ah 108V battery. That should give you solid 10+ miles. So, you can make any single trip in a city in one go. But if you ride too far to get home on same charge, or have a longer round trip, you just plug it in 5 minutes, charging at 10C with 50A at 120V, and youâre 80% full again and keep going.
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I think the part missing here is the batteries not yet supporting super high charge rates, unless its LFP. While I would say that everyone should be using LFP as much as possible, cost and space can render these options useless, especially in esk8. Once L2 chargers and DCFC chargers become more ubiquitous (on every light post) then I think we can start looking at designing solutions for our PEVs. Having a single standard would help as well, instead of the fractured crap we have now with J1772 1+2, Mennekes, CCS 1+2, CHAdeMO etc. all making our connector and standard choices that little bit harder
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Totally agree. Seems though, LFP is coming back. It might take a while for it to become a viable alternative to us, but I think itâs just a question of time.
Same with charge stations. But I predict that they will keep growing exponentially in the next two years.
Mercedes is betting big on that with their new eSprinter. It has only 80miles range! They bet on you wanting to save money upfront (which is a prime consideration for commercial fleet replacements), and then being ok charging once or twice mid-day. For that to be viable, the DC Fast charging network needs to expand. If such key players are pushing it, I am sure it will happen. The economics are tipping in favor of it happening sooner rather than later.
Thatâs 6000watt 
do you know how much that is? + what charger you will need for this. A charger from 25kg 
It is just important to find the sweet spot. Higher capacity means also more possibility to fast charge. Thatâs the reason why tesla 100D etc can charge at such a high current. Also the reason why they lowered the current from the 80D models.
I readed somewhere an article where they where using high discharge and high capacity cells together. So they can charge at a high current but still has a great range.
Keep in mind we are talking higher end PEVs such as larger scooters and electric motor bikes, and even up to EVs. EVs usually start at 400v and can go higher, with Porsche supporting 800v (I think, maybe 600) and DCFC speeds of 350kw
Donât sweat it mate, you can have your Corona if you really want it.
Yeah comprendo!
But still lager scooters and motor bikes are not at the same level off the EVâs like cars.
Just the way how the li ion cells are at this moment we need a bigger pack if you want some high current charging.
And for scooters and motor bikes there is not that much extra room for bigger packs. I am very curious what the future of batteries will be in 10year. If there are going to be some cells which can discharge and charge at the same amps then one problem is solved.
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