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Fisker Karma versus Tesla...or why EVERs will outlive EVs

1890 Views 2 Replies 3 Participants Last post by  EVer1
Why EVER (Electric Vehicle Extended Range) will outlive EV (Electric Vehicle)...

=> The smaller the battery capacity of an EV, the greater the range anxiety (bad thing for consumers). The bigger the battery capacity of an EV, the greater the upfront investment which stays idle most of the time (usesr need to buy as much battery capacity to include less frequent far distance travel) and looses value over time due to memory loss of battery and technological advances making battery costs cheaper over time. Also, due to decreasing battery power over time, range anxiety is increasing.

> The idea of the EVER concept is to buy only so much battery capacity that you ideally have just enough electricity to fullfill your daily needs. If you need a bit more or go on a longer trip, then the gasoline engine kicks in to produce electricity. This way you become grid and travel distance independ. This way an EVER car will always outpeform an EV car. And even the environmentally most conscious people will realize sometime down the road that an EV purchase is actually an outright wasteful act.

> Another way of looking at it...EVER is a concept that requires you to do a small upfront investment (buy battery capacity) that allows you to arbitrage different energy prices (electricity power is much much cheaper than gasoline power...and will always be this way).

Below I have collected some data from various car models available in the market and have calculated their battery efficiency (battery usage on a daily basis):

Assumptions: Average driver in US: 40mi per day, Cost for battery: USD 600 per kWh (varies prob between USD 500 – 700), electricity is cheaper than gasoline => saving on gasoline: USD 5 per day (depending on electricity and gasoline usage / costs)

Plug-in Prius: 5.5kWh (Battery costs USD 3K), EPA 11mi (Battery efficiency 100%)

Fisker Karma: 20.1kWh (USD 12K), EPA 32mi (100%)

GM Volt: 16.5kWh (USD 10K), EPA 38mi (100%)

Nissan Leaf: 24kWh (USD 14K), EPA 73mi (55%)

Tesla S-40: 40kWh (USD 24K), EPA (estimated) 140mi (29%)

Tesla S-60: 60kWh (USD 36K), EPA (estimated) 200mi (20%)

Tesla S-85: 85kWh (USD 51K), EPA (estimated) 265mi (15%)

EVs are very expensive and buying them is a outright resource wasteful act...and therefore, EVs will ultimatively be doomed...look at the Tesla S-85. You pay about USD 51K for a battery capacity that you will only seldom use...and this capacity's shelf-life is even decreasing due to memory loss of the battery! EVER is a much smarter concept and will ultimatively prevail in the market...and Fisker has spearheaded and is further developing the EVER concept.

Fisker, keep going! Great achievement so far!
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Thanks for bringing clarity to me. You make some very good points. I think you might be right.
I was sure glad to have the "er" on my EV Karma today. I parked in my garage last evening with 2 miles left on the battery. No problem for my 10 mile commute this morning to meet a friend for brunch. Except that I forgot to plug in. Even with a 30 minute "quick charge" I would have been seriously late for meeting my friend if I didn't have my "er" extended range. That is equally true for a 50 mile battery or a 300 mile battery.

I hated to use gas due to my forgetfulness, but, it would have been worse to need to borrow another family member's car (all ICE anyway).
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