my wife and I are thinking of starting a three track racing, short course/off road, on road and rally course track rental car business, based on fun and building the RC racing industry, tracks would be built for entry to mid level customers, with LC Racing 1/14 scale cars, question is, are there charging system to charge multiple lipo batteries at the same time, might have up to 40 cars, any help would be appeciated !!

The answer is yes. There are multiple brands of lipo chargers that can charge between 1-4 multi cell (1s-6s) batteries. There may be chargers that can do more, but this is what I have seen.

Where will your tracks be located? I love the rally track idea!!!

Many brands do sell 4 channel chargers. I think the Dinamite Prophet sport Quatro does meet the best requirements with all connections to the front so it is easy to place many in line.

If you vant t save money with an easy charger you can also think of getting a bunch of SkyRC E4 chargers.

And thinking much cheaper, get some 30 dollar Server PSU's (12v-60A) and a bunch of Turnigy B6 chargers (or the smaller B4 version)
http://www.hobbyking.com/hobbyking/s...6S_Lipoly.html

Do some research on parallel charging. I parallel charge all the time with my multirotors.

Check out Joshua Bardwell on YouTube and his parallel charging videos. Very informational.

I currently have 2 turnigy Reaktor 250w chargers on a 750w power supply. I can charge 12x 1300mah 4s lipos all at once and have 12 batteries ready from storage to full charge in roughly 40 minutes.

I was checking to see if there might be a charger that would do maybe 8-12 packs, I've seen the 2-4 pack chargers, I might have to go that route, the track would be in the Vancouver WA area, maybe Portland OR, looking for an indoor building at this time and working with Ben Sun from LC Racing on the cars and support parts, and maybe becoming a distributor for LC racing.