Does my gas guzzling car have a "burn rate"?
I use two meters, fuel in tank, and miles driven.
On average I do about 325 miles for full tank. More if highway, less if city, but for certain when I am about 300 miles, need to get gas soon (started that habit after my old car fuel gauge stopped working).
As you said, it is all an estimate, and the only estimate that counts is when you down to last, say, 15% of energy. Will you make the fuel... I mean recharge station?
Two very different regimes. Your gas-guzzler has much longer range and (though expensive and otherwise problematic) refueling is quick and widely available. Your gas-guzzler is also relatively insensitive to changes in driving style and conditions because it's already throwing away 80% of the energy it's provided, regardless.
The LEAF has a small "tank", refueling stations are not omnipresent and refueling takes much longer. It is far more sensitive to driving style and conditions. Being able to confidently avoid a lengthy fuel stop is a big dividend.
Of course, but I can do just as good with my entire dash off as I can with "burn rate".
It is easy to judge speed to about +/- 5mph of actual, and after a while to about +/- 1 MPH.
With EV, slower the acceleration or decel the better, and slower you go the better (to point).
I was interrupted and cant remember what my threat was about... I think above comments completely irrelevant then, LOL
I understand the range differs more on EV then IC
But for a specific trip, it can easily come down to a decision on whether a somewhat longer(slower) travel will help you avoid an even longer recharge stop. That is, just how efficient do I need to be on this particular trip? Pre-planning can take care of a lot of this but a useful real-time feedback would be helpful for many (not all). The ECO trees may be real-time but give no units information that you can do math with.
This I completely agree with.
Perhaps a comparison range of ALL systems ON (with 10% reserve), vs all systems OFF on the dash will be the most helpful.
Is the range is know, then it can give you a change of success %.
Also, with known range and charge, it can suggest turning off items, like radio, A/C, other items, to maximize range.