Still waiting of course but could sure have used the C-Max's regen yesterday taking the mountain roller-coaster ride to the Highland Maple Festival. Route 250 west to Monterey with approximate elevations of 1800 (North Mntn), on up to 2900, down to 2100 (Headwaters), up to 2450 (Shaw's Ridge), then 2100, back to 2700 (Bullpasture Mntn), then 2100 (McDowell), 3350 (Jack Mntn) and finally 2900 feet at Monterey - all in about 30 miles. Just couldn't stop thinking about all that potential energy going to waste! I'm sure it varies with slope and curves (how fast you can go) but does anyone know how much elevation drop it takes to completely recharge the battery (standard hybrid - not Energi)?