80Ah ADD ON build

[Burgerman]

Its as good as 1.7x an extra set of MKs. Since you only get about 40 to 45Ah from those.

[foghornleghorn]

Is there a reliable way of measuring how much Ah I have been using from my gels to do the 19 miles which seems to be my limit?

[Burgerman]

Only way is to use a turnigy watt meter.

https://hobbyking.com/en_us/turnigy-180 ... tore=en_us

[expresso]

Nice job! Thats crazy capacity for an add on!

thanks - yeah i would have never though this a few years back - no way to get some much in a small compact size - this little pack gives more than 1.5xmore range than lead of group 24 easy - i hope when added to the chairs 100ah - i get the range i need for a days ride -

my goal is to get thru the day longest trip and have a number 5 on my chairs JS for battery condition - i may be asking for too much - but if it can - then i would feel safe going distance.

[Burgerman]

Sin85 just ordered SIXTEEN 176Ah cells for his chair.

That gives him either 352Ah at 24V or enough range to leave the country.
Or 176Ah at about 52V with double the speed which actually gives him even more range...

viewtopic.php?f=2&t=8452#p129531

[expresso]

yeah thats great - to fit 16 of those - how big would the battery box need to be ?

i guess this is a custom chair build - wont fit in any stock chair thats for sure -

[Burgerman]

optimus. More scooter than powerchair?

I'm more machine now than man. Copyright star wars.

[expresso]

https://www.ebay.co.uk/itm/Meyra-Optimu ... 2220556757

[Burgerman]

A range of approx 42 + miles is possible with the largest battery option.

Those are 100Ah lead. So around 55 to 60 usable. So 42 miles per 55Ah. Adding real 176Ah batteries means 3.2x more range.
So 3.2x 42 miles is 134.4 miles...
Adding another set, so 16 cells like above, means a ridiculous even in Australia, 268.8 miles range. For those of you in metric thats 432.6km.

[expresso]

i would say i am done - i will use a vinvly cover - with velcro on the ends and on the shoe box - like a flap - - this is the most compact pack i made so far - and will sit more compact in the backpack - with the backpack strapped close to the seat back - it will be secure 3 ways - first the handles on the chair - then the straps that will wrap around the push handles that are sewn on the backpack - and the bungee cords also - should be the most secure and compact with the most Ah stuffed in there so far - and its fused this time

i can work on the next step - cables - one from the SB120 on the chair end - to a SB50 end - short cable - then longer cable from there to the pack. - and last but not least the charge cable i have to make - fun fun fun -

[Burgerman]

Neat. But awfully heavy and bulky for an addon.

[expresso]

its not that bad really - pictures look that way - well you have to understand its an ADD ON - its always be a bit bulky and you can figure adding about 35 pounds at most - you cant have it both ways - either you make the whole chair lithium inside with enough - or add an ADD ON which isnt bad at all -

this is actually a few inches thinner - then the previous ones - - once its done and i put it on the chair - i will take good pictures sideways etc, and it wont be past the rear of the chair battery box - its compact more than it looks from the pictures here - - its a trade off you have to accept - if you want -

many reasons some users dont do there whole chair - this makes it very simple to add a TON of lithium and a TON of extra range simple easy plug and play - and can take it from chair to chair - easy to work on - hopefully wont have to touch it once in use - set it and forget it

Headways are bulkier - cost more and get less than half the Ah in a larger space - this is the best solution - using these cells - instead of headways - my other ADD ON - 45ah headways - is bulkier than this one for sure - - it also makes a difference on the chair you strap it on - it can sit nicer on one chair and not as good on another - that you have to accept.

[ex-Gooserider]

What are you guys doing?

And I use 15mm or 1/2 copper pipe out of the garage. Just cut a bunch of short bits to length with a pipe cutter... Flattened in the vice! Clean and shiny when using new tube. Easy to DIY.

I then put them in the drill vice 8 at a time, and use the pillar drill... Drill all at once. Drill 6 or 8mm. Debur with a countersink bit in my hand as copper is soft. You can do 8 or so in about 10 mins. You only need 7.

I've never made (or needed to) connectors like Expresso, but this is a punch kit that I've had for years to make holes in sheet metal / plastic / leather / fabric / ???? for a variety of of other projects... I was just suggesting it because he needed a better way of doing holes in his connectors, but it is good for just about any sort of material from light steel and softer...

When I do need odd bus stuff, I own a sheet of 1/16" copper about 3' on a side - likely a lifetime supply - with pipe as a fall back... I do sometimes use short lengths of copper pipe or pipe couplers if I need a crimp splice for making "Y" harness bits with big wire, or other odd-ball connections, crimp with the hydraulic crimper and then solder...

ex-Gooserider

[ex-Gooserider]

WHY in the name of BM's favorite Deity are you using an SB-120????

No advantage from an electrical standpoint, and a lot of extra size and bulk... Given that you are going to have to really work at getting the wire to even fit securely in the size pins an SB-120 uses, it might even be worse...

Power handling is limited by the smallest component in the circuit - since I believe you said you were using AWG 8 wire, that is your limit, and an SB-50 is really more than you need....

I haven't seen ANYONE using more than AWG 6 on a chair - and that is marginally overkill - and that is what the SB-50 / PP-75 series is made for...

Stick with the SB-50...

ex-Gooserider

[expresso]

the chair itself uses SB120 connectors - its not my choice to use them - they can handle a 2 awg connector in an SB120 - which i am going to use to fit a 6 AWG wire along with a 8 AWG together to piggy back off the stock setup to get my 24V cable which i will add a SB50 on the other end -

i never done this with such thick wiring - and have one chance at getting it right since i only purchased one set of SB120 -

[expresso]

in that picture on top - its an SB120 - i have to get in between that - so it can still flow the same way but with an extra set of cables coming from there for my ADD ON -

[Burgerman]

As long as you use a flame it will be fine.

They went full retard when they decided that those were a good idea! Completely OTT for a 120A control system. They dont hurt anything, but they take up a lot of space. I used to use those to start cars, with 4 to 600A currents.

[expresso]

they are big - but i can make it fit nicely right on top in between the two there already - the system is not 120A - its more like a 150A - i spoke to them about it - with there own electronics - if using there new Insurance approved model - you wont get this or there electronics - 300M - cut costs - for insurance purpose uses a 90A model - DX something like that - more modern than the Box i have -

i actually grown to like it - industirual - i even asked them why not use Rnet 120A instead - they have tried it in the past and didnt hold up well enough - i would have liked to see Rnet on there 300M model at least - .

[Burgerman]

Cost... Many chairs with r-net are not 120A per motor either. Theres a cheaper 90A one fitted to most chairs. Because they think we dont understand the difference. It has built in actuator control etc and less power. Total cost of upgrading to 120A version with separate seating/lighting module and 120 controller is much more expensive. So just because its r-net doesent mean its 120A.

[expresso]

Cost... Many chairs with r-net are not 120A per motor either. Theres a cheaper 90A one fitted to most chairs. Because they think we dont understand the difference. It has built in actuator control etc and less power. Total cost of upgrading to 120A version with separate seating/lighting module and 120 controller is much more expensive. So just because its r-net doesent mean its 120A.

yes i know theres a 90A model El model i believe - led with no screen - on the JS - i done the research on there website to learn the different control models they offer - also on the order form its clear and have both - its an upgrade and costs alot more - if going to 8.5 motors on the quickie its required to get the 120A which is 100A most of the times - 120A for a few secs if and when needed -

636 chair 6.5 comes with 90A - 646 8.5 comes with 120A - - you can upgrade the 636 to get the 120A but once going to high speed motors - its a must to configure it with the 120A

[Burgerman]

yes i know theres a 90A model El model i believe - led with no screen - on the JS - i done the research on there website to learn the different control models they offer -

Any joystick, including the latest all colour large screen advanced metal case joystick works with the 90 or 120A power module. Its a fully mix and match system. Likewise the nastiest all plastic no screen joystick works fine on the 120A power module too.

also on the order form its clear and have both - its an upgrade and costs alot more - if going to 8.5 motors on the quickie its required to get the 120A which is 100A most of the times - 120A for a few secs if and when needed -

That 120A is 10 secs limit. A long time. Its only ever needed if you do a zero turn on grass/carpet etc to initiate a turn. So 10 secs is plenty. Its needed more often on faster motors, nose heavy chairs, or fat users like me. And not only on fast chairs. Its needed occasionally on even 6mph chairs. If the 90A version is fitted instead, then you can get "stuck" and it wont climb a curb, or refuse to do a zero turn on a slope or something. So its ALWAYS wise to have it. It is never detrimental, it may not be needed much of the time. But on the occasions it is, its available! YOU keep control.

636 chair 6.5 comes with 90A - 646 8.5 comes with 120A - - you can upgrade the 636 to get the 120A but once going to high speed motors - its a must to configure it with the 120A

Its pretty good idea on the 6mph one too.

[expresso]

alot depends on insurance also and your vendor - therapist etc, comes down to cost - if you have good insurance that can bend the rules a bit - or if you can make a case for needing a 120A over the 90A - they wont understand what we need - etc, as you explained - and dont care in the end -

in my case - i used the chair outdoors ALOT - and that alone is good reason to need 120A - gives me control - form and function - and the power i need when needed - i have had chairs with 80A my first P220 - i never had an issue with it or felt it needed more and didnt have the power - but back then i didnt use it as much or as hard as i do now so hard to say for sure - in any event - get 120A if you can anyway - even on the 636 if i had to get that model - i would insist on it -

[expresso]

coming along - i will have this in my backpack tomorrow and on my chair - will show you how compact it really is on the chair - its about the best one i made so far for its compact size - alot of Ah - and neat clean once installed - whats left is the charge cable Subd - and the rest of the cabling to the chair end -

but the pack is done and will be installed tomorrow - not connected to the chair of course i didnt know what to use to cover it so i found this faux leather and use it this way - once connected - i dont plan on having to touch it again - but if i did - its very easy to remove the cover and have it exposed to check and work on - dont even have to remove at all - everything can be working on from on top - unless of course you have to change out a Cell - that would be the exception - other than that - just plug and play - use it - charge it - reuse it charge it - may out last me

[shirley_hkg]

Loads of bags on back of wheelchair is norm .

Have you seen the old man
In the closed-down market
Kicking up the paper
With his worn out shoes?
In his eyes you see no pride
Hand held loosely at his side
Yesterday's paper telling yesterday's news

So how can you tell me you're lonely
And say for you that the sun don't shine?
Let me take you by the hand and
Lead you through the streets of London
Show you something to make you change your mind

Have you seen the old girl
Who walks the streets of London
Dirt in her hair and her clothes in rags?
She's no time for talking
She just keeps right on walking
Carrying her home in two carrier bags

So how can you tell me you're lonely
And say for you that the sun don't shine?
Let me take you by the hand and
Lead you through the streets of London
Show you something to make you change your mind

On the streets on Bangkok . . . .

[Burgerman]

A poet.

[expresso]

whow thats alot of stuff on the chair - its normal for me to have a backpack so i am used to that - most people have one here also to carry stuff - mines cant be used for anything - its packed with lithium

Ok the 80ah pack is in the bag now and on the chair - this is how it will look - its just about right - even with the rear of the chair - i will adjust it a bit more and will sit a little closer to the seat back when i am done - nothing is connected - no wiring - thats all thats left now - cable to chair and charge cable for the pack -

no rush - will fix and adjust backpack a bit more and then leave it alone - hopefully wont have to remove it - but if i did have to - its not hard - just unplug cable - - lift off chair - i did add a strap on the bottom of the backpack which you cant see - both ends - it wraps around the chair push handles - on the bottom and snaps together to hold it to the rear of the seat back - so it wont swing away - i will also add two flat strong bungee cords - but i have to find a good spot for them that works and looks neat - it would work without them this way also - i see how it ends up - i think i can get them to work and look nice - this way i feel extra secure and not think about it when i am out riding -

overall its not bad at all - i dont think

[snaker]

Yes, the whole chair still looks nice and compact. It is even more well-proportioned with the add-on

[expresso]

Yes, the whole chair still looks nice and compact. It is even more well-proportioned with the add-on

yes i think so also - thanks - i am glad i rearranged the cells to save about 2 inches

will try the same way from now on if i do any more

[expresso]

Two more cables to go - and done - i adjusted the bag better - its supported by the bag handles - a strap on the bottom of the bag going around the push handles and snapped together out of site behind your seat cushion - - i added one budgie strap going from left to right - just to keep the stress off the other straps - its tight - bag dosnt move -

when i need to charge - remove one strap - lift the cover - plug it in - charge -

this has been so far the best looking fits the chair perfect - secure - and alot of lithium in there

[expresso]

cable