TRAILER RANGE, not even close.

[MidAtlanticLightningClub]

...and. climbing (steep degree of grade) also affects things noticeably, with trailer and without trailer.

Climbing does but if you go up and down on the same charge the impact is small.

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[21st Century Truck]

Climbing does but if you go up and down on the same charge the impact is small.

Although there is some regeneration gaing on duting the way back down the hill it is never complete.

Moreover, I've been in situations where going up a long mountain range impacted the traction battery so significantly that I needed to recharge on the way up before I could go back down. Mainly on the high passes in the Rockies, in the Sierras and overall across the Western U.S.

 

[Firn]

...from another thread on the subject (the GOM):

As a wise older engineer once told me: "Electricity is not a liquid. You can measure water or gasoline or diesel or kerosene or coal almost exactly, by volume and by weight. Stored electricity can only be measured by its potential to do work".

When I switched to EV driving years later, I began to understand what that old engineer had shared with me.

Hence, the Guess-o-Meter on our EV vehicles. It tries to estimate the potential to do work by our vehicle-stored electricity. It's always an ever-changing estimate and not an actual measure of physical weight or volume. It's not wrong in what it tries to do... we users have to un-train ourselves from a lifetime habit of measuring fuel by physical attributes (gallons / liters / pounds etc.) and then our GOMs might become more useful to us.

Hope this is a useful way to look at our instrumented info.

I have to be honest, i dislike that statement about batteries.

Our ability to measure the amount of energy in the battery is just as good as our ability to measure the energy content of a tank of fuel. Yes, their is some variance, but the relationship of temp, voltage, age, etc are well understood. LFP is harder, but also not terribly complex. I get what that statement is trying to say, but in the real world trying to measure how much fluid is in an oddly sized tank, while it is sloshing around, and of some slightly variable ratio of gas, corn alcohol, water, etc means there is just as many inaccuracies there.

The guess o meter is just bad programming, and it matters to us more because our ability to recharge is SOO much more limited than our ability to get fuel.

Just my $.02

 

[jetfixr1]

I think we can accurately measure electricity. Your utility provider bills you down to the watt. What cant be measured is driving habits and environmental settings which are proven to have the highest impact on the guess o meter. Even if you daily drive at 70 mph for 30 miles on the highway, consumption will never be the same. The guess o meter tries really hard, its like trying to perfect an equation that can never be perfected.

 

[climateguy]

There is some loss due to inefficiencies when recharging (what the charger delivers is more than what the battery receives), so you’ll need to be careful to account for that when you double-check.

Thanks. I hadn't thought about that. It seems 90% efficiency is what "they" say.

 

[SpaceEVDriver]

Thanks. I hadn't thought about that. It seems 90% efficiency is what "they" say.

Yeah. And it’s going to be different for each charger + vehicle combination. I think 90% is probably not a bad average to use.

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