I made a post about it here:
Model X Range
Apologies if this has been discussed and I missed it but we are planning our first short road trip. I'm using EVtripplanner. Anyone figure out what options they like best. I was trying to decide on equivalent "S" drop down option of 19" or 21" and a speed multiplier that would give me a realistic "Wh/mile" estimated value for good planning. I realize there is more drag on the X vs S. As well HVAC (heat more so than A/C) has a pretty big impact. I was looking to see if other real-world users of this tool had suggestions.
Here's a couple I was thinking of:
Image:
http://i.imgur.com/IYg07WX.png
Image:
http://i.imgur.com/ujIkD3M.png
From EVTripPlanner Help tab:
How It Works
EVTripPlanner uses a physics-based model to predict how much energy your EV will use along your route. It accounts for:
- Speed: this is usually the biggest contributor to variation in energy usage. We use Google Map's traffic-based estimate of current speed, which you can adjust up or down with the 'Speed Factor'.
- Air density: this varies with temperature and altitude. The same level-road trip at a higher altitude takes less energy than at sea level since the air is thinner. Similarly, the same trip (without air conditioning or heating) takes less energy when it is hotter since the air is thinner. We determine altitude over the route using the Mapquest database and use your input for temperature.
- HVAC: the heater and air conditioner, as well as any energy required to heat or cool the battery pack, use energy...even when you're not moving. We look at your cabin temperature setting and your estimate of the outside temperature.
- On-board Systems: the computers and other on-board systems use energy, even when the car isn't moving.
- Weight & Elevation Changes: the weight of the car and payload (entered) are used along with elevation changes along the route to determine energy used climbing...and recovered during downhills.
- Friction, efficiency, regeneration: each EV converts electrical energy in the battery to mechanical energy at the wheels a little differently (and vice-versa). We account for these conversions and differences.
- Your Car Model: each car has different parameters for how they use energy in the categories above. EVTripPlanner takes the best data available to match our model to the actual measurements and published charts.
Trip Settings
Setting the parameters for your trip is critical to getting an accurate estimate of the energy that will be consumed. The most important setting is your "speed factor", which is how much faster or slower than the prevailing speed
Setting the parameters for your trip is critical to getting an accurate estimate of the energy that will be consumed. The most important setting is your "speed factor", which is how much faster or slower than the prevailing speed (as estimated by Google Maps at the time of planning the route) you are going on average. Unfortunately, you can drive in different patterns and have the same average speed while consuming different amounts of energy. While these errors don't tend to be very large for long trips, the closer to "cruise control" you are at the average speed on long segments the closer the estimate will be. Also fill in payload, outside and cabin temperatures and your correct car model - these can make a significant difference.