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Here is the Battery design, that will fit the compartment. Each module will be 19S and 26P 70.3V nominal 130Ah Per module 9,139Wh capacity Number of cells 494 Weight of cells 34,083G Weight of Cell holder (printed in carbon PETG) 642.2G (added some green on there) Total weight less nickel...

Ah I see, here in Australia they just raised to 1000v PV input. for residential, I've been looking at the commercial stuff like battery chargers that are being attached directly to solar arrays in say shopping centres ect. none of them are yet to exceed 750v. Im certain with time there will be...

Costing in screenshot Comes to $22876 Aud matched. Had a quote from cascadian motion for the IM-425 that came in at $36,000 aud same voltage. Same peak KW, at same 750v 200kg vs AXM4 at 56kg. IM-425 is 2620nm so way more torque peak. It’s what’s going in the new freight liners… owned by...

Hey Tim, I have selected a beyondmotors MV with a rating of 400kw peak for 30 seconds. 230kw continuous. 1000nm peak motor will be matched and configured inhouse to a DTI controller. 750v is the rated 400kw. MV was chosen due to the requirement of a second controller for the LV option. Max...

Yes I see I see, I had previously only seen a very sketchy looking Chinese option of these style BMS at ridiculous pricing and didn’t cover the balance current required for cell deviations. At 12-6months ago when I was searching for solutions, there was nothing I could find. Hence the DIY...

Yes, most OEM do build for worst case scenario. But this is also because of parts selection like overkill motors with small batteries. And high C draws. I am certainly not planning on doing that with sizing he modules to the vehicle to avoid excessive systems. (Water cooling/heating) I’m...

Do you believe infinite growth is possible on a finite planet? That human population can continue forever… That’s madness, In the time I’ve had a house I’ve seen so much land around me get bulldozed into cookie cutter houses. A never ending Fibonacci sequence for a species is not a good...

That’s what I am doing! Cad drawings and costings and such. If people didn’t project what others have done in the past at me. Like you just did and you actually had a question I wouldn’t be making pointless responses…

Yeah we can see this, we are not all dumb. So much bad shit was happening, for me this is my exit. Off grid mobile home, start a business with ethics, shared profits 0 risk model. We can only do so much in a life, but telling people on diy Solar forums about it does nothing. See the source of...

Appreciate the feedback. Yes I did consider the weight of the vehicle. As with motor home conversions, people run into trouble with GVM weight restrictions. The electric motor will be the same peak torque as the diesel and will have 160kw higher peak output. I do have a fair amount of budget...

I see electric vehicles a a good thing, I do see that there are some skewed numbers, I also see more carbon as more plant life ability on the surface. yet again you come in thinking you “know” everything about my thought process. This is not about the carbon foot print (solely) clean air...

Hey Tim, it’s not that I don’t want discussion around what I am doing. It’s the way others approach it, rather than asking why I have chosen things a certain way. They “tell” me how to do it, based on how they would do it. But unfortunately for them they are not the ones who are doing it. It’s...

S You want me to rely on people’s misfortunes and being involved in a vehicle accident… that’s a twisted logic. Not to mention if you don’t have access to the full bms, you only end up with heaps of modules you can’t buy a balancer for… As for engineers, I’m sure if they were allowed they...

The whole point of the bus is to be an inspiration, to show what every one of us is capable of. That when we are aware of our actions and the consequences, we don’t need to over engineer things. I say this as most manufacturers want to be in the game, pushing batteries to the limit… in order to...

Unfortunately I don’t have access to off the shelf BMS systems designed in factories by teams of engineers. The packs will be around 700mm in length and in custom 3d printed housings. Surrounded by a full steel frame. I guess you could say, rack mounted 12v packs. Basically in a safety frame...

Appreciate the kindness and lack of pessimism, seems there are a few sour grapes in here. So really appreciate the kindness. Akiva

I've been building Li-ion battery packs for some time. lets simplify this so I can share the concept. Each battery Module 14.8v nominal will have a Bms, This will balance the 4s 28p module, (over, under, voltage, ect,) I'm certain you are aware of the way that works. Lets say that there is 33...

So got the bus on stands, ready for under chassis work, (rust prevention) paint. Air suspension work new airbags. Roof is tapped and insides 50% removed. Also have some goodies at home when I’m back. tester and some cells.. see the outcome of cycle life expectancy and go from there! Those Geb...

Nah still here, off working and sourcing parts, writing a plan for the bus systems for easy engineering solution. Yes there is a lot of cells, like 25000 or so and yes that's a lot of welding. (most likely going to set up a laser welder) made from a laser tattoo removal unit, (styropro) on...

best of my knowledge at heart vehicle is between 0.5-1kw per Km that give a range of 200-400km at worst case scenario fully loaded 20.5T. charge times are high but with dc/dc its not bad and only going to become more common in the future. Depending on design it may end up with more than 400kwh...

very true, I am redesigning the roof to fold out to around 99m2 that will give around 25kw capacity up there. all to be passed by engineer tho.. the its drawn and I get I too him I will find out

Ahh they won't be a bms between the 12v modules, a 10 amp balancer will be installed. If the voltages of one of the bms on the 12v modules is out it will pull the contractors for charge and discharge. All the modules will be tested matched (parallel) before building the string. Smaller modules...

So far projected costings (quoted) 400kw/1000nm torque, motor + controller combo is $33,000 Aud (weight 65kg) 400kwh of 21700 cells at $0.80c Usd is around $25933 Aud + shipping and import tax (1.1T aprox weight) Bms/balance is expected at $2000 Aud possibly double if I split it into 2...

Hi all, I’ve been browsing for a few days and have just purchased some GEB21700 battery’s in small quantity for testing. Firstly I ask of you if there is any decent charge/discharge cycle testers that I can purchase for a reasonable price. To be able to check capacities of cells. I’ve...