Lecram said:If the batteries are almost empty, will then the Rex keep running (with enough fuel, of course)? And if the fuel tank is empty, will it give you another range after filling it up?
With other words: is it (theoretically) possible to make a really long trip with the Rex if you refill the tank every 80 miles?
TomMoloughney said:Lecram said:If the batteries are almost empty, will then the Rex keep running (with enough fuel, of course)? And if the fuel tank is empty, will it give you another range after filling it up?
With other words: is it (theoretically) possible to make a really long trip with the Rex if you refill the tank every 80 miles?
Yes, you can continue drive and refueling for as far as you need to go.
That's a common misconception. It will continue to act as a 170hp car, using more than 34 hp (up to 170hp) when demanded, and regenerating energy to the battery when less is demanded. The car should be able sustain an average of 75mph (~24hp is all that is needed to sustain that speed, but efficiency losses must be accounted for) or so with full ability to make short accelerations assuming no net altitude change. A prolonged climb with a depleted battery would probably require slowing a bit below 75mph.Niek1970 said:But your power is limited then (when batteries are empty)! Due to the 34 bhp engine, the car will act as a 34 bhp car... So i would say: avoid running out of batteries.
Lecram said:I understood that the percentage where the rex will engage is adjustable. The Rex I drove with the test drive had the nr. 7 button programmed as a Rex on/off button.
We don't have hills here in Holland (only in the 'Belgium' part of the Netherlands are some small hills) so that will not be a problem here.
At the other hand, FastNed is building 201 fast chargers along the highways so that we can charge our i3 every 40 km within 30 minutes.
jcal0820 said:...and talking about degraded performance, the U.S. spec REX reportedly will engage only when the traction battery's SOC reaches 5% or below. At that point, the REx operates as not much more than a trickle charger, struggling to maintain that 5%, maybe a little higher under the most optimal driving conditions. So forget about climbing those long hills and passing traffic. This was apparently done to meet California emissions and CARB requirements, which also means that all U.S. bound i3 REXs will operate this way.
The biggest concern I have is the effect on the traction's battery's lifespan. From what I've read, the sweet spot for and EV's SOC is between 80 to 20 percent if you're looking at keeping the battery's capacity to last as long as it can. However, if the American REX is designed to engage only when SOC reaches below 5%, then its basically contributing to battery degradation and eventual loss of capacity. And because the REx will try to maintain 5%, the deep cycling that results in battery degradation keeps going & worsens (whereas in the pure BEV, this can't possibly happen, obviously) until the engine is shut off. So, if used regularly, it looks like you're looking at a battery that may have the same loss of capacity in a few years or less, just like typical electronic mobile devices which get used & abused all the time. That sounds hard to bear on a $50,000 car as opposed to a $100 celphone. I hope they change the REx settings on the U.S. version before it lands at dealerships.
jcal0820 said:...and talking about degraded performance, the U.S. spec REX reportedly will engage only when the traction battery's SOC reaches 5% or below. At that point, the REx operates as not much more than a trickle charger, struggling to maintain that 5%, maybe a little higher under the most optimal driving conditions. So forget about climbing those long hills and passing traffic. This was apparently done to meet California emissions and CARB requirements, which also means that all U.S. bound i3 REXs will operate this way.
The biggest concern I have is the effect on the traction's battery's lifespan. From what I've read, the sweet spot for and EV's SOC is between 80 to 20 percent if you're looking at keeping the battery's capacity to last as long as it can. However, if the American REX is designed to engage only when SOC reaches below 5%, then its basically contributing to battery degradation and eventual loss of capacity. And because the REx will try to maintain 5%, the deep cycling that results in battery degradation keeps going & worsens (whereas in the pure BEV, this can't possibly happen, obviously) until the engine is shut off. So, if used regularly, it looks like you're looking at a battery that may have the same loss of capacity in a few years or less, just like typical electronic mobile devices which get used & abused all the time. That sounds hard to bear on a $50,000 car as opposed to a $100 celphone. I hope they change the REx settings on the U.S. version before it lands at dealerships.
jcal0820 said:PS: I see you got the Active E since '12... About how much range are you getting these days compared to when new?
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