gmuzhik wrote:1. QC info: In San Diego, we have a problem with utility demand charges to anyone who installs a QC unit that might be obscene. For example, if you exceed the upper limit of your allowed kilowatts, then the utility will assess a $20 per kilowatt charge! Since the QC units can put out 50kW, the demand charge can be up to $1000!!!
There are actually several charges, and the actual cost to run a stand alone 50kW load for 15 minutes per month in San Diego is a multiple several TIMES $1000 per month (source: SDGE). The limit to trigger a charge is 20kW or above for any 15 minutes period (for commercial electricity).
gmuzhik wrote: Driving in the rain: Have any of you Northwesterners figured out how much additional drag if any that rain causes? I am in San Diego and drove my Leaf in a Seattle-like downpour last weekend and got to wondering if there is additional drag that we might need to factor in our range estimates.
In aircraft, there are no reductions for aerodynamic losses with precipitation while airborne or on the ground, but significant losses for runway performance (the wheels dragging through the muck). A properly drained highway, with no standing "contamination" (snow, slush, standing water, hail, etc) will have virtually no measurable road drag with proper tires (worn out, bald tires might be quite different).
Any range losses in the LEAF in rain would most likely be the heater use or the impact of colder than normal temps on the batteries. Or possibly windy conditions, and you're driving into a headwind. Losses that aircraft incur in bad weather are generally associated with de-ice and anti-ice efforts, which extract "bleed" air that has be heated and pressured by the turbine engines.