ULtra Compact 1800W charger + Eltek programming

Batteries, Chargers, and Battery Management Systems.
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Doctorbass   100 GW

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ULtra Compact 1800W charger + Eltek programming

Post by Doctorbass » Jul 18 2015 12:06am

Guys i think i have found the world most compact and powerfull charger ever 8)

It's a ELTEK 1.8kW flatpack S !!

These are availlable in 24 and 48V and take from 100 to 240V.

But what is fantastic is that they have the unbeatable 47 W/cu inch density !! and are 96.5% efficient!!!

These are the size of these cheap 2A 48V charger!!!

I will fit one or two in my NYX frame.

By modifying one i was able to shorten it to about 7.5" long!!

These are 2.8 x 1.6 x 8.5" size.

I contacted the Canadian representative of these and i will get a quote for more.. These are perfect to combine with the Adaptto.

They are OEM 53.5V and 33.7A and output 1800W on 240V ac input and about 1000W on 120V ac

I had no BANANA gus .. very sorry for that.. I only had apple :P

But see how small it is !!

I also atached a comparaison between some popular rectifiers ( server power supply we use on E-S)

Doc
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Last edited by Doctorbass on Apr 13 2017 1:54pm, edited 1 time in total.
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Re: ULtra Compact 1800W charger

Post by cwah » Jul 18 2015 7:37am

wow that is incredible small.

And perfect for my 14s battery if it can charge up to 57V!!!

How much is it? Is it protected against vibration?
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Re: ULtra Compact 1800W charger

Post by Doctorbass » Jul 18 2015 10:00am

cwah wrote:wow that is incredible small.

And perfect for my 14s battery if it can charge up to 57V!!!

How much is it? Is it protected against vibration?
Yes it is small.. even it is difficult to believe that it output 1.8kw from being so small !

Yes it can do up to 57v but it need to be programmed.. Eltek said it is possible to get them preprogrammed at the desired voltage and current.

They are well built for damping vibration with silicone on the important ckmponents inside.

I am waiting for their response for price quote.

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
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-Succeded to haul a 19200 pounds schoolbus!
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Re: ULtra Compact 1800W charger

Post by Nobuo » Jul 21 2015 10:51pm

So at 30Amps of a 48V battery 54.6V charging it would only generate 60W of heat :shock:

Do you think the noise would be enough low to night charging on the same room?

It has variable rpm fan?

looks maybe the first real competitor to the satiator in terms of efficiency :o

where can we read the comparison between other popular rectifiers?

thanks for sharing!
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Re: ULtra Compact 1800W charger

Post by Doctorbass » Jul 22 2015 9:55am

Nobuo wrote:So at 30Amps of a 48V battery 54.6V charging it would only generate 60W of heat :shock:

Do you think the noise would be enough low to night charging on the same room? NO

It has variable rpm fan? YES

looks maybe the first real competitor to the satiator in terms of efficiency :o

where can we read the comparison between other popular rectifiers? HERE by searching :wink:

thanks for sharing!
Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
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Re: ULtra Compact 1800W charger

Post by pm_dawn » Jul 27 2015 5:29am

Hi Doc !

Do you have any good photos of the connections ?

REgards
/Per

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Re: ULtra Compact 1800W charger

Post by gensem » Jul 27 2015 11:02am

Very tiny... got the price cotation back Doc?
Justin we really appreciate what you did!

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Re: ULtra Compact 1800W charger

Post by Doctorbass » Jul 28 2015 3:40pm

About 400$ each brand new :lol:

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
YOUTUBE---https://m.youtube.com/user/Doctorbasss
http://twitter.com/DocbassMelancon
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Re: ULtra Compact 1800W charger

Post by gensem » Jul 28 2015 7:28pm

Doctorbass wrote:About 400$ each brand new :lol:

Doc
I was expecting a high price, but not that high. =/
Justin we really appreciate what you did!

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Re: ULtra Compact 1800W charger

Post by aCeMadMod » Jul 29 2015 6:23am

hi Doc you Very helpful to all es . but one thing have you seen the size the Eltek Smartpack controller, it Big. if you want change amp and volts.
http://www.eltek.com/detail_products.ep ... id=1123846

i bet it not cheap. ( :(

i was try to find flat pack1 i only can flatpack 2 for $80

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Re: ULtra Compact 1800W charger

Post by pm_dawn » Jul 29 2015 7:57am

Should be just a matter of finding out the correct CAN message to send and have a little arduino to do that.
.....

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Re: ULtra Compact 1800W charger

Post by MrDude_1 » Jul 29 2015 8:05am

Everytime I see something like this, I get all excited.. until I see it doesn't go up to 66v. :(

looks like I'm still on the doubled up 33v meanwells for now... once you get used to charging at 1300w, you dont want to go down.
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Re: ULtra Compact 1800W charger

Post by remmie1972 » Aug 06 2015 5:36pm

eTrike wrote:One of these just went for $160 on ebay :cry:
Sorry, that was me :roll:

Just got it delivered today :D

I plan on using it to charge my 2014 Zero SR, but still need a second one to get the voltage high enough.
I already have a fast charger for the Zero consisting of 2x TDK FPS1000 PSU's but looking for more power in a smaller package :P
The FPS1000 is exactly the dimensions and the weight of the meanwell RSP-2000, So a transition to this Flatpack S would double the power and more than half the weight and even more decrease the volume for me.

Connecting the PSU to get it to output is super easy. I'll take a picture of the correct connections tomorrow. Just connecting the 230V volt supply was enough to get it to output 53.5 Volt. No further connections necessary.

If you look at the back side connections there are 5 ports. the 2 ports on the left each have 6 spring like connections (tabs) and all 6 tabs are connected together. These 2 leftmost ports are for the AC supply input (L1 and L2)
the 2 rightmost ports are also 6 tabs each with all 6 connected together per port and these are the DC output connections (minus on second to right port and plus on the rightmost port)
The middle port is a little special as it has 3 tabs on the bottom (All 3 are ground for the AC supply) and the top 4 are yet unknown to me. Probably the CAN/RS-485 and possibly 5 of 12V. I'll try to find out tomorrow as well.

53.5 Volt times 2 is not enough to get Zero to full charge so the output has to be altered via the RS485 bus. I read somewhere that that is a one time process. The PSU will keep it's output voltage after that. So the chase for the correct CAN-bus message to set it to 57.6 volt (maximum output voltage) is ON. :lol:

The picture below shows how the connections are made in a normal 19" rack (ATTENTION, the picture is from a flatpack 2 NOT a flatpack S but the connector is almost the same). The first thing i noticed is that the DC outputs are reversed compared to my flatpack S. Also in the picture it shows 3 connections on the top for the CAN-bus where the Flatpack S has 4 tabs.

Image

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Re: ULtra Compact 1800W charger

Post by remmie1972 » Aug 07 2015 2:55pm

Well, I had some success connecting to the Flatpack S

Of the middle port (with the 4 tabs on the top) the 2 tabs on the top right of that port are for the CAN-bus (not RS485!)
The top right pin (of the middle port) is the CAN-H and the pin to the left of it is the CAN-L.

That's consistent with the picture in my previous post if disregard the fourth pin in the port.

Connecting it all up to an arduino with a can-bus converter it took some time to discover that the bus speed is 125 kbps which is kind of an odd speed. :?

Anyway it outputs this message about every 2 seconds :
32 (can bus ID) 27 20 20 113 17 8 32 0
and every 15 seconds
0 (can bus ID) 20 20 113 17 8 32 5 0

The second message looks a lot like the first but shifted 1 byte.

When I put a load on the PSU (4 lightbulbs 12V 21W, measured at 1.90 A) the last number of the first line reads 12 instead of 0 and to me that looks like the current draw.
roughly calculating that 12 out of 255 (8 bits) equals a range of 0-40A
The second message however doesn't change at all.

So with 1.90 Amps the message every 2 seconds
32 (can bus ID) 27 20 20 113 17 8 32 12
and every 15 seconds
0 (can bus ID) 20 20 113 17 8 32 5 0

Next was trying to get a temperature reading but no change whatsoever from the values.

I could imagine that the 113 value is the voltage on a range of 0-120 Volt (113/255*120 = 53.2) but I haven't got a load large enough for the voltage to drop.

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Re: ULtra Compact 1800W charger

Post by Doctorbass » Aug 07 2015 3:22pm

remmie1972 wrote:Well, I had some success connecting to the Flatpack S

Of the middle port (with the 4 tabs on the top) the 2 tabs on the top right of that port are for the CAN-bus (not RS485!)
The top right pin (of the middle port) is the CAN-H and the pin to the left of it is the CAN-L.

That's consistent with the picture in my previous post if disregard the fourth pin in the port.

Connecting it all up to an arduino with a can-bus converter it took some time to discover that the bus speed is 125 kbps which is kind of an odd speed. :?

Anyway it outputs this message about every 2 seconds :
32 (can bus ID) 27 20 20 113 17 8 32 0
and every 15 seconds
0 (can bus ID) 20 20 113 17 8 32 5 0

The second message looks a lot like the first but shifted 1 byte.

When I put a load on the PSU (4 lightbulbs 12V 21W, measured at 1.90 A) the last number of the first line reads 12 instead of 0 and to me that looks like the current draw.
roughly calculating that 12 out of 255 (8 bits) equals a range of 0-40A
The second message however doesn't change at all.

So with 1.90 Amps the message every 2 seconds
32 (can bus ID) 27 20 20 113 17 8 32 12
and every 15 seconds
0 (can bus ID) 20 20 113 17 8 32 5 0

Next was trying to get a temperature reading but no change whatsoever from the values.

I could imagine that the 113 value is the voltage on a range of 0-120 Volt (113/255*120 = 53.2) but I haven't got a load large enough for the voltage to drop.

Welcome to the forum remmie!

Nice tests!.. What would be awsome is to find a way to reprogram the set voltage to the desired value. These can be programmed for 58Vdc witch wold be awsome for the Zero motorcycle battery of 116V. That would only require 2 of these in serie to put 3600W in a very ultra compact size for charging the battery!

I guess it would be possible to modify the resistor divider that measure the voltage to false the reading and get the 116V, but let see if someone can get it reprogrammed!

I already asked to the Canadian sales rep from Eltek and he said he would help me to hget the software but he can't....

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
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Re: ULtra Compact 1800W charger

Post by izeman » Aug 07 2015 3:42pm

Doctorbass wrote:Nice tests!.. What would be awsome is to find a way to reprogram the set voltage to the desired value. These can be programmed for 58Vdc witch wold be awsome for the Zero motorcycle battery of 116V. That would only require 2 of these in serie to put 3600W in a very ultra compact size for charging the battery!
you would need 4 chargers to charge 3600w@116v. not two :(

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Re: ULtra Compact 1800W charger

Post by MrDude_1 » Aug 07 2015 4:49pm

izeman wrote:
Doctorbass wrote:Nice tests!.. What would be awsome is to find a way to reprogram the set voltage to the desired value. These can be programmed for 58Vdc witch wold be awsome for the Zero motorcycle battery of 116V. That would only require 2 of these in serie to put 3600W in a very ultra compact size for charging the battery!
you would need 4 chargers to charge 3600w@116v. not two :(
No. Same amperage, twice the voltage..... doubles the wattage.
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Re: ULtra Compact 1800W charger

Post by izeman » Aug 09 2015 1:23pm

MrDude_1 wrote:
izeman wrote:
Doctorbass wrote:Nice tests!.. What would be awsome is to find a way to reprogram the set voltage to the desired value. These can be programmed for 58Vdc witch wold be awsome for the Zero motorcycle battery of 116V. That would only require 2 of these in serie to put 3600W in a very ultra compact size for charging the battery!
you would need 4 chargers to charge 3600w@116v. not two :(
No. Same amperage, twice the voltage..... doubles the wattage.
sorry. i don't get it. the charger does 1800w@58v. two of them can do 3600w@58v or 1800w@116v.
do you say you want to double the voltage and keep the amps still at ~30? how would that work? so it would turn into a 3600w charger?! i'm confused.

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Re: ULtra Compact 1800W charger

Post by MrDude_1 » Aug 09 2015 1:55pm

izeman wrote: sorry. i don't get it. the charger does 1800w@58v. two of them can do 3600w@58v or 1800w@116v.
do you say you want to double the voltage and keep the amps still at ~30? how would that work? so it would turn into a 3600w charger?! i'm confused.
wattage is not "at" any specific voltage. You take the Amps, and multiply them by the voltage (or visa versa) and you get wattage.
so placing them in series you keep the amperage the same, but you double the voltage... making twice the wattage.
placing them in parallel, you double the amperage, but the voltage remains the same... making twice the wattage.

doing what hes talking about,
1 of them is 1800 watts. at 58v dc that would be 1800/58 for 31.03 amps

putting two of them in series, its 58v +58v for 116V... but the same amperage... it remains at 31.03 amps.

116*31.03= ~3600

2 of
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Re: ULtra Compact 1800W charger

Post by circuit » Aug 10 2015 7:22am

pm_dawn wrote:Should be just a matter of finding out the correct CAN message to send and have a little arduino to do that.
.....
There is no 'correct message'. It actually has a quite complex communications protocol, with logging in, pinging, selftests, etc. And protocol is not publicly available.
Your best bet would be to buy a complete system with controller, tap in to the line and reverse engineer it. Not for average people for sure, and not for most of us here. But doable.
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Re: ULtra Compact 1800W charger

Post by MrDude_1 » Aug 10 2015 7:43am

circuit wrote:
pm_dawn wrote:Should be just a matter of finding out the correct CAN message to send and have a little arduino to do that.
.....
There is no 'correct message'. It actually has a quite complex communications protocol, with logging in, pinging, selftests, etc. And protocol is not publicly available.
Your best bet would be to buy a complete system with controller, tap in to the line and reverse engineer it. Not for average people for sure, and not for most of us here. But doable.
Yeah, assuming minimal security a programmer makes cracking it much easier... almost fun.
You can trace the messages down by programming it at various voltages, then when you understand that part, you can just send your own message.

but... at that point you may still be unable to program it as high as you want, as it may be scaled so that you can only go so high... or it may be more secure (unlikely)... etc.

I would just find a friendly engineer that works for them, and talk to them directly. No sales guys.
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Re: ULtra Compact 1800W charger

Post by circuit » Aug 10 2015 7:53am

MrDude_1 wrote:I would just find a friendly engineer that works for them, and talk to them directly. No sales guys.
Let me know when you do...
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Re: ULtra Compact 1800W charger

Post by madin88 » Aug 11 2015 10:28am

what a nice find DOC! Put it into a peli 1170 case together with the Adaptto coil and you have a very transport friendly charger.
do you know if eltek also offers lower power, but smaller size 48V psu (as ex 1000W)? The 1000W flatpack 2 charger has same size as 1800W model.
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Re: ULtra Compact 1800W charger

Post by Doctorbass » Aug 11 2015 11:07am

madin88 wrote:what a nice find DOC! Put it into a peli 1170 case together with the Adaptto coil and you have a very transport friendly charger.
do you know if eltek also offers lower power, but smaller size 48V psu (as ex 1000W)? The 1000W flatpack 2 charger has same size as 1800W model.

yes they have! they have 1000W same size i think.

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
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Re: ULtra Compact 1800W charger

Post by dnmun » Aug 11 2015 12:53pm

circuit wrote:
MrDude_1 wrote:I would just find a friendly engineer that works for them, and talk to them directly. No sales guys.
Let me know when you do...
i can just see it now. engineer spends 4 months writing code and finally has a successful product and some dufous wants him to spill the beans secretly so he can hack and sell his own design. yeh sure, i know a lotta engineers who would gladly do that. NOT.

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