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View Full Version : Noob and ul-1 w/ lipo



Diesel6401
01-13-2010, 02:52 PM
Question, so i'm new rc 's and new to lipo's. My question is that I currently run 2x 2s zippy 4500mah 30c lipos. I want to add some more voltage to my boat. Being since the batteries run in series can I run a 2s 4500mah 30c lipo with a 3s 4500mah 30c to equal 5s? As long as the "C" and mah ratings are the same voltage really shouldn't matter since their added together anyway. Is my thinking correct or am I way off?

6S HYDRO
01-13-2010, 03:07 PM
yes but dont run longer than 1 min.

Diesel6401
01-13-2010, 03:11 PM
yes but dont run longer than 1 min.

Y is that? I would like more run time, how could accomplish that without changing esc?

6S HYDRO
01-13-2010, 04:33 PM
no chang motor and esc to accommodate 5s, maybe a 1300-1500kv motor and at least a 150 amp esc

Diesel6401
01-13-2010, 05:09 PM
no chang motor and esc to accommodate 5s, maybe a 1300-1500kv motor and at least a 150 amp esc

Sorry I meant to say without changing esc, I edited the above statment. So instead of going to 5s would more amps make a difference in perfomance, say 5000+mah at 40c or 50c? My goal is to provide best battery power without changing the stock esc/motor. I currently run 2s 4500mah 30c zippys like I said above I also have some 2s 4000mah 25c tenergys I run in my SV. I really like the perfomance of the lipo's it's amazing. I truly noticed the difference in my SV. My ul-1 is fast enough for me right now. I run a x440/3 and I love the perfomance and heat is not an issue at this time. I am just trying to gain some knowledge on best setup solutions for this boat. So far I have 0 complaints and am truly loving rc boating :thumbup:. Just a whole lot to learn, I've only been in for 3 months.

6S HYDRO
01-13-2010, 05:24 PM
get the 40c 2s batteries, or get 2 4s 3700 batteries and run them in parallel for 4s2p

Diesel6401
01-13-2010, 05:43 PM
get the 40c 2s batteries, or get 2 4s 3700 batteries and run them in parallel for 4s2p

I found some 2s 4000mah 40c's on HC I may go with. Thanks so much for all the help.

wizard122
01-13-2010, 09:32 PM
Hi Diesel check out these thread http://forums.offshoreelectrics.com/showthread.php?t=12248 found it yestrday

Diesel6401
01-13-2010, 09:57 PM
Hi Diesel check out these thread http://forums.offshoreelectrics.com/showthread.php?t=12248 found it yestrday

Hey what's up wizard. Sweet I'll have to give those a try and order them when I get a chance. Did your pond freeze up over the last few days? The part of lake norman that I normally run at was surprisingly frooze. Are you running those in your SV?

Diesel6401
01-13-2010, 10:06 PM
Hey wizard those turnigy 5000 40c's are out of stock at HC. These are the ones you have correct? http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=10305

6S HYDRO
01-13-2010, 10:10 PM
those are the ones- dont do a 4000 pack it wont have as many amp discharge. 5000 mah and higher for boats. the 2 3700's would be 7400 mah and 80c

Diesel6401
01-13-2010, 10:14 PM
those are the ones- dont do a 4000 pack it wont have as many amp discharge. 5000 mah and higher for boats. the 2 3700's would be 7400 mah and 80c

I run 4000 25c in a SV and 4500 30c in a ul-1. You think this is too low? I run for maybe 5-7ms, the stutter bump or lvc has never tripped on either boat

6S HYDRO
01-13-2010, 10:22 PM
just calc it out 25c 4000mah= 25 x 4 or 100 amps

30c 4500mah= 30 x 4.5 0r 135 amps

40c x 5000= 200 amps

you want to only use 70 percent of your amps so if your ul-1 is pulling 90 amps peak (whick most do) you would want batts that provide 30% more amps than your pulling so
ul-1 pulling 90 amps with 135 amp batts
70% of 135 is 94.5 amps so your right there, the 40c would give you 65 amps more leeway

6S HYDRO
01-13-2010, 10:23 PM
hence the 40c's will prob never puff out on ya

Diesel6401
01-13-2010, 10:27 PM
just calc it out 25c 4000mah= 25 x 4 or 100 amps

30c 4500mah= 30 x 4.5 0r 135 amps

40c x 5000= 200 amps

you want to only use 70 percent of your amps so if your ul-1 is pulling 90 amps peak (whick most do) you would want batts that provide 30% more amps than your pulling so
ul-1 pulling 90 amps with 135 amp batts
70% of 135 is 94.5 amps so your right there, the 40c would give you 65 amps more leeway

Cool, I will have to wait until the get back in stock. Do you happen to know what SV's peak at?

6S HYDRO
01-13-2010, 10:36 PM
yeah im waiting for stock too. the sv's usually pull alot less but everything depends on how big a prop your runnin and how many kv motor

Diesel6401
01-13-2010, 10:36 PM
If I did go parallel how would I go about it. Grab this adaptor from OSE http://www.offshoreelectrics.com/proddetail.php?prod=dh-gpmm3142 and disconnect the series jumper from the two esc connectors and just solder the two wires from the esc to one connector? Basically get rid of the two battery connections and make one and use with this adaptor. Just weighing my options and gaining knowledge.

6S HYDRO
01-13-2010, 10:41 PM
no you can flip the deans opposite and fit one pos. end in the one hloe and one neg. in the other its hard to explain - but you dont have to go to a single deans-hence you can still run series packs as well

6S HYDRO
01-13-2010, 10:42 PM
ill take a pik

Rumdog
01-13-2010, 10:45 PM
Be careful with the SV. It does not have a low voltage cutoff.

6S HYDRO
01-13-2010, 10:47 PM
http://i721.photobucket.com/albums/ww218/6s-hydro/DSC00644.jpg

Diesel6401
01-13-2010, 10:47 PM
Be careful with the SV. It does not have a low voltage cutoff.

I installed a dimension engineering lvc as well as a cc bec. My SV is just an electrical hazard lol. Gotta love it

Diesel6401
01-13-2010, 10:54 PM
WHOA that looks crazy 6s, so both batts plug into the bottom i assume and where do the 2 connectors for the esc plug into? I only see one female input at the top for esc? Could I do it the way I decribed above though? Please bare with me. Funny part is that am an aircraft mechanic and rc boats make me think more than planes do...lol

6S HYDRO
01-13-2010, 11:29 PM
that was just an example, you would use the one from offshore and your regular leads comin out from your esc. thats how you plug 2 deans into a single parralell port

6S HYDRO
01-13-2010, 11:36 PM
just what i had layin around to show you with, i dont use deans anymore and have moved srictly to 5.5mm bullets

6S HYDRO
01-13-2010, 11:41 PM
http://i721.photobucket.com/albums/ww218/6s-hydro/DSC00644.jpg

i would never run this setup- too much resistance, just shows you how to flip series deans to one single parallel plug

Diesel6401
01-13-2010, 11:42 PM
That connector from ose only has 1 input for the esc though correct? So just install red wire for esc into + side of the connector and have the - left out and do the opposite for the other connector? I wish I could better explain what am trying to say. bascialy one side of each connection from the esc would be left unplugged. that way I could easily change back in forth between series and parallel? Am i close?

bwells
01-13-2010, 11:56 PM
Wow. 6S: is that connector UL approved? That was a lot of work to make!

6S HYDRO
01-14-2010, 12:17 AM
That connector from ose only has 1 input for the esc though correct? So just install red wire for esc into + side of the connector and have the - left out and do the opposite for the other connector? I wish I could better explain what am trying to say. bascialy one side of each connection from the esc would be left unplugged. that way I could easily change back in forth between series and parallel? Am i close?

you are correct

6S HYDRO
01-14-2010, 12:19 AM
Wow. 6S: is that connector UL approved? That was a lot of work to make!

no its not UL, all im showing is a series connector and a parallel connector hooked together to show diesel- dont run this contraption shown

bwells
01-14-2010, 12:45 AM
Okay, I see it now, both the series and parallel, I assume your thumb is covering the connection of the black wire to the other Deans. Very innovative and a good explanation.

longballlumber
01-14-2010, 08:26 AM
All of those connectors "stacked" up together ='s LOTS of resistance. I would not recommend running anything with that type of connector configuration. Something like that would generate A LOT of heat.

Later
Mike

6S HYDRO
01-14-2010, 11:42 AM
i would never run this setup- too much resistance, just shows you how to flip series deans to one single parallel plug

as stated previously longball

longballlumber
01-14-2010, 12:44 PM
No prob 6S,

Just don't want our new boater getting the wrong idea by showing pictures of what not to do...

Later
Mike

Diesel6401
01-14-2010, 02:43 PM
No prob 6S,

Just don't want our new boater getting the wrong idea by showing pictures of what not to do...

Later
Mike

Thanks for looking out, 6s did a great job of using that as an example and really specified not to use it. You guys on this site our great, thanks again.

6S HYDRO
01-14-2010, 03:15 PM
thanks diesel