No, 11.1v would be 3s lipo (as in 3.7v per cell, but fully charged it's 4.2v per cell). 4s would be 14.8v(16.8v). I use 4s b/c it runs the hyd pump much faster for more oil flow.
Pretty much any esc nowadays, whether it's for brushed or brushless will have a lipo cut off built within it to protect the lipo pack from being discharged below 2.96v per cell. Any lower & that will destroy the lipo. Make sure one your esc's has that feature turned on, preferably the one that is providing the BEC to the rx.
When you place your order with Vario Germany, make the request for two 516:1 for the track drive motors. You are ordering direct from Germany, correct? You'll get it much cheaper than through any subsiduary distributor that might carry it.. unless it's your local hobby shop doing the deal for you?
Do you have much snow yet? How many hrs of daylight do you currently have? That's way up there!.. 5yrs ago I visited my brother who was living/working in Norman Wells, NWT in late June.. 24hrs of sunlight, out quadding at 2am.
