I agree, this site needs more categories. If I may suggest some slightly different category names:
+1 EV Formulas (or maybe "performance predictions" or "EV Calculations")
+1 Battery Education (or "Battery Tech" or "Battery Questions")
+.5 PWM Controllers
+.5 Contactor Controllers
+.5 Rectactor Controllers (what's a rectactor controller)
Maybe these 3 categories could be reduced down to a single controller category and then these 3 types of controllers could be described in the an FAQ board Or, maybe we could have a single controller forum with 3 sub-forums. I know V-Bulletin offers this option, but I don't know if they charge extra for it or anything like that.
+.5 Battery Balancers
Could this be included in the "Battery Education.Tech/Questions" board? Or could this be included in the charger board. I guess balances are included in either situation aren't they? Maybe we could have a "Batteries, Chargers and Balancers" board. I actually think that this would make the most sense as part of the "Battery Education.Tech/Questions" board.
+.5 Open Source Projects (What's an open source project?)
+2! Video's of EV's, Projects in progress, DIY Videos, etc. (love the vids!)