Feb 17, 2013, 09:57 PM
"Get off the runway!"
United States, TX, Hutto
Joined May 2012
580 Posts
Quote:
 Originally Posted by turnerm If I'm parallel charging 2 4s batteries I assume the voltage in your formula still stays at 14.8V?
Yes.
Feb 17, 2013, 10:06 PM
FLYAK
United States, AK, Anchorage
Joined Oct 2011
5,906 Posts
Quote:
 Originally Posted by turnerm If I'm parallel charging 2 4s batteries I assume the voltage in your formula still stays at 14.8V?
Now you got it.
Feb 17, 2013, 10:16 PM
doh!
United States, AR, Little Rock
Joined May 2006
4,852 Posts
Quote:
 Originally Posted by turnerm So my new 4Runner has a 400W 120V plug in the back. It would be nice to use my meanwell power supply and my iCharger 3010B that way but the meanwell is a 1000W power supply. I know NOTHING about electricity (voltage, wattage, etc). I assume it's feasible to plug my charger setup into the outlet as long as I don't go above a certain amp charge rate? Is there any way to figure out what that rate might be? Or is it best just not to use that at all for this purpose and stick with my deep cycle field charging battery?
Don't worry, if you overdo it you just blow a fuse. I've done it twice
Simple easy fix. Mine isn't 400w either, that's a nice enhancement. Mine is only like 100 watts or so, I can barely charge anything back there.
Feb 18, 2013, 06:19 AM
Merrimac, MA
Joined Jan 2006
1,299 Posts
Quote:
 Originally Posted by zmonster97 What day are you going?
sunday
Feb 18, 2013, 07:31 AM
Team Hillbilly
United States, OH, New Albany
Joined Jun 2006
420 Posts
Quote:
 Originally Posted by bryansifsof44 nope you should be able to parallel any amount of 4s batts at W(watts your system is rated for) / V (nominal voltage of pack...in your case 14.8V for a 4s) = A (amps you will be setting) In other words... in your car 400W / 14.8V = 27A. Remember your efficiency will be around 70% with that system so 27A x .70 =18.9A safely no matter how many packs you have in parallel. 6s @ 22.2V your gonna be restricted to about 12.5 amps no matter how many packs you have hooked up. At you house if you have a 24V power supply you are regulated by your 30A built in limit of the charger.
Just curious, but why would you want to go from DC to AC and back to DC? Wouldn't it be more efficient just to run a DC line off of the fuse panel to back of the vehicle? And wouldn't a 400W load run the battery down quickly?
 Feb 18, 2013, 07:36 AM 3dizzle 4 lyfe United States, OH, Philo Joined Jul 2011 2,656 Posts i killed the battery in my dads truck charging 6S's at the field. we had to get a jump fro someone else.
 Feb 18, 2013, 07:57 AM Aerobatic Fanatic United States, KY, Louisville Joined Sep 2007 2,910 Posts zmonster97, Let me know what you come up with since I'll eventually want a 4" red spinner for the gas powered 103" with falcon prop. Would like to just buy it, drill it, and slap it on
Feb 18, 2013, 07:58 AM
Aerobatic Fanatic
United States, KY, Louisville
Joined Sep 2007
2,910 Posts
Quote:
 Originally Posted by cale10 i killed the battery in my dads truck charging 6S's at the field. we had to get a jump fro someone else.
Just jump it from a charged 4s lipo next time if you have one laying around. I've done that once on a friends van
Feb 18, 2013, 08:32 AM
Gone Huckin'
Charlotte, NC
Joined Jan 2011
9,262 Posts
Quote:
 Originally Posted by bryansifsof44 nope you should be able to parallel any amount of 4s batts at W(watts your system is rated for) / V (nominal voltage of pack...in your case 14.8V for a 4s) = A (amps you will be setting) In other words... in your car 400W / 14.8V = 27A. Remember your efficiency will be around 70% with that system so 27A x .70 =18.9A safely no matter how many packs you have in parallel. 6s @ 22.2V your gonna be restricted to about 12.5 amps no matter how many packs you have hooked up. At you house if you have a 24V power supply you are regulated by your 30A built in limit of the charger.
Thanks Bryan. But just to be clear I would be using the same power supply at the house and in the car. But I'm assuming what you're saying is that the limiting factor at home is the 30A max charge rate of my charger right?
Feb 18, 2013, 08:36 AM
Gone Huckin'
Charlotte, NC
Joined Jan 2011
9,262 Posts
Quote:
 Originally Posted by blaiss Just curious, but why would you want to go from DC to AC and back to DC? Wouldn't it be more efficient just to run a DC line off of the fuse panel to back of the vehicle? And wouldn't a 400W load run the battery down quickly?
The car has to be running in order to utilize this outlet. But yes... I would drain the car battery in a hurry if it weren't running.

The reason I'm trying to use AC power is because I've got my charger setup to run at the house and it goes off of AC. The car has both AC and DC outlets. The AC outlet can go up to 400W. So I want to simply take my meanwell power supply and my 3010B with me when I go flying and simply plug it up in the car just as I would in the house and charge my batteries that way.

I've also got a deep cycle marine battery for this purpose but I like having the flexibility of using both if I want to.
Feb 18, 2013, 08:38 AM
Gone Huckin'
Charlotte, NC
Joined Jan 2011
9,262 Posts
Quote:
 Originally Posted by ryan_m Don't worry, if you overdo it you just blow a fuse. I've done it twice Simple easy fix. Mine isn't 400w either, that's a nice enhancement. Mine is only like 100 watts or so, I can barely charge anything back there.
That's true. It's odd though... in the manual they say not to use anything that pulls more than 10 amps from the DC outlet but they don't seem to specify for the AC outlet. They DO specify the watts though so I guess I should go by that (as Byran has done) instead and assume that the resulting amp draw is OK?

I could've sworn that I read somewhere at some point the other night that it was rated for up to 15 amps but now I can't find it.
Feb 18, 2013, 09:59 AM
Team Aztech Aeromodels!
United States, PA, Allentown
Joined May 2011
3,021 Posts
Quote:
 Originally Posted by hugocraft zmonster97, Let me know what you come up with since I'll eventually want a 4" red spinner for the gas powered 103" with falcon prop. Would like to just buy it, drill it, and slap it on
Ok, but I won't be getting a painted spinner.
 Feb 18, 2013, 10:12 AM ol' yellow eyes is back United States, NY, Alfred Joined Apr 2009 7,888 Posts who's going to WRAM? I'm planning for friday, but may be there saturday instead.
Feb 18, 2013, 10:15 AM
Team Aztech Aeromodels!
United States, PA, Allentown
Joined May 2011
3,021 Posts
Quote:
 Originally Posted by Irg who's going to WRAM? I'm planning for friday, but may be there saturday instead.
I hope to! I want to go friday, but I'll probably be there saturday.
Feb 18, 2013, 10:25 AM
FLYAK
United States, AK, Anchorage
Joined Oct 2011
5,906 Posts
Quote:
 Originally Posted by turnerm Thanks Bryan. But just to be clear I would be using the same power supply at the house and in the car. But I'm assuming what you're saying is that the limiting factor at home is the 30A max charge rate of my charger right?
Totally.