1.

I want a relatively inexpensive HV CAR ESC, so I can ditch the mechanical brakes on my Savage and MT2 speed trucks (both run 33v from A123).

6s seems to be enough for me most of the time. I did play with a 8s setup once just for kicks and it ran very well, but with quality components the 5s and 6s setups run plenty cool and efficient for me for the most part.

Is it really cheaper to buy a 10s or 12 2200 mah pack vs a 4s, 5s or 6s 5000mah pack? Seems like you are just trading cell size for cell quanitity and the price will shake out about the same.



I'll put it this way... If the 12s 200amp controller was the same price as the 6s 200 amp controller Id buy the 12s all other things being equal. But if the 12s controller costs twice as much I'll stick with 6s.

+1 for HV

High Voltage.....................:gasp:

A 12S 100A would be the same as a 6S 200A controller in terms of power and they can be made to be the same price, it all depends on the company making them. With so many people buying 8000, you will see that going with the smaller packs helps a lot in terms of price, weight and placement of the packs in your veicle. Example: 2 3S 8000mAh ($235.48 and 545 grams each)= $470.96 and 1090 grams, now 2 6S 2200mAh ($149.99 and 340 grams each)= $299.98 and 680 grams. The 8000mAh packs each have the following dimensions: 44mm X 137mm X 38mm. The 2200mAh packs each have the following dimensions: 51mm X 33mm X 107mm. jhautz with this little info would you still vote for LV or would you go with HV?

But thats an unfair comparison, just because lots of people choose the 8000 doesnt mean you can evenly compare 6s 8000 to 12s 2200. Looking at the power each pack provides (taking 3.7v nominal cell v) thats about 177Wh from the 6s and under 100Wh from the 12s, of course the 12s will be smaller and lighter...

And on top of that, I've noticed people tend to choose th 8000 for 3s and 4s setups, and then 4 or 5000 for 6s...

Sound like the HV will be versital enough and you can run it at a lower voltage. The HV gives a person options. I vote the HV.

This is just to show some of the advantages of HV. I use all kinds of voltage in my RCs and I really want an HV systems from one of the US based companies. Yes, it's a unfair comparison, but what is more unfair is only having to go overseas to find HV capable controllers for cars. Most of the things I hear about conversions is how heavy my RC is. I'm not saying you can only stick to 12S 2200 or 2500mAh, but it was mentioned to show the weight difference. Please vote for the one you would like.

I vote for: 1 HV

still vote for HV. can you please tell me the approximate dimensions of the controller? and would it be possible to make a 150-200a HV controller?

lutach... Your not telling me anything that I didn't understand when I wrote my first reply.

I didn't "vote" for LV, I said I wouldn't pay allot more for the HV and that 6s seems to be plenty in my experience. If you cant get a truck to run cool on a well setup 6s rig, then you have problems.



As far as your battery size and cost argument please see below.

My thoughts exactly. Comparing apples and oranges here. Give me a comparison with the same amount of potential energy in both setups and then tell me how much "cheaper" and "lighter" it is.


This question is like hammer or screwdriver.... which one is better? Unless you know the "for what" you cant answer it. I am just trying to give you some context around my thoughts. There isn't an answer that is black or white IMO.

HV is nice.. but 6S is not Low voltage either.. LOL..

they're both nice.. and definately powerful.. but with higher voltage, you could use thinner wires because of the lower amp draws.. I think that's the only advantage... and a little bit more efficient...

a fair comparison would be 12S 4000mAh vs 6S 8000mAh... would be the same...

1 for hv

If my 200A controllers were to be built they would have the following dimensions: 105X74X17. For comparison the Schulze 40.160 has the following dimensions: 120X71X20. Now this is mainly because of the DPAK MOSFETs. With new technology in MOSFETs available a manufacturer can make them smaller. One example that I like a lot is the HV110 from Castle. Now the HV110 uses the Si4470 http://www.vishay.com/docs/71606/71606.pdf. Here are 2 components with 8-SOIC footprint that puts out some good number: NXP (Philips) http://www.nxp.com/acrobat/datasheets/PH1875L_1.pdf and Renesas http://documentation.renesas.com/eng...hat2266hds.pdf.

I like the HV but would want a higher current rating so if I choose to run LV that day (or in a certain vehicle) I can do so without worry of taxing the speed control and heating it up. HV is great and definitely the better way to go, no doubt there, but not everyone has the means to make the switch just yet. New chargers, batteries, motor's, etc. cost money, a decent amount of money. Buying a new controller would be step 1 in upgrading, then the other equipment follows. So while I'm saving to upgrade I want to be able to run my new controller in my current setup. Maybe that's just me though. An idea could be to do two versions, one of which is high amp. (I believe Castle has four versions of their new Hydra, 60, 120, 180, and 240 amps, 50v max)

Anyway, I would still rather see a HV controller purpose built for cars, I just worry about new guys who want the best x product, break it, and want it to be covered even though it was their fault and didn't bother to read any instructions. Grrrr... I remember when I was in Japan and I was helping a guy get his Mad Force running. I pull off the body and see there's no air filter. I said, "Dude, your air filter fell off." to which he replied, "Oh, no it didn't, I took it off because it felt more powerful when it was off.". I was stunned. The thing is, some people just aren't as into the hobby as much as the people on this forum are, for example. And they'll be some of the ones to buy this controller.

Sorry for the rant:oops:

Edit: Is the controller going to be 100 amp 12s or 200 amp 12s? 200 amp is great, I was referring to 100 amp when I started my post.