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battery capacity

  1. Range vs Efficiency

    General EV Discussion
    It seems to me that the EV market is missing a key piece of information when you are looking for your next vehicle. For all ICE we have for years based our view of efficiency on MPG, but I can't find any such readily available indicator for EVs. It's not hard to find the total WLTP range and...
  2. Down to 27KwH this morning

    Nissan LEAF24 & LEAF30
    Depressing. Although the figure is not shown on the app, the underlying API actually includes a Watt-Hour figure. My version of the AlexaNissan skill includes telling me the figure. When I first set it up, about Christmas, it was giving me 28KwH after an overnight charge, which I hoped was down...
  3. A new 'personal' best.

    First Generation Ampera and Volt
    Wee bit of background. Car wasn't used for a week, left plugged in and fully charged. When I went to head to work today I forgot to preheat, Torque was reporting a charge capacity of 86% (used to be 83%, then jumped to 87%). Charge up today and when I went to come home Torque was showing 90%...
  4. More or less public charging

    General Charging Discussion
    Hi, it is an assumption that as BEV batteries get bigger with more range, the need for public charging goes down. But if the extra range means the BEV is used more for much longer trips then it could be that the need for public charging actually goes up. So if you have switched to a longer range...
  5. Increased battery capacity? - warning longish post

    First Generation Ampera and Volt
    I use Torque Pro with an OBD to read things from the Ampera. Normally when the car is fully charged I have been seeing a battery charge of 83.5% with it occasionally showing 84.1%. Today on the way to work I had 2 miles remaining and about 2 to go with a couple of junction acceleration points...
  6. EV cars if you travel 80 miles per day

    Ice Breakers
    Hi, we are looking to move outside London and buying a second hand EV car but we are not sure if that will be suitable for us. I'm completely new to this world and I would like to ask some advice, please. I will need to do between 70-80miles per day to go to work and come back home and I'm...
  7. Frequent fast charging - does it damage the battery?

    Nissan LEAF24 & LEAF30
    A comprehensive battery long term test has been running using four 2012 Nissan Leafs in Phoenix, Arizona. The full report (which is very technical and lengthy) is here: https://avt.inl.gov/sites/default/files/pdf/vehiclebatteries/FastChargeEffects.pdf A brief extract is below. As part of the...
  8. Want to learn from people who drive electric vehicles

    Ice Breakers
    Hi! I'm Susie, and I'm working with a small team to design innovative power solutions for electric vehicles. I'd love to talk to you and get some advice from you to understand the problems you have and how we might solve them. Let me know if you're interested in a quick call so I can pick...
  9. OY11PTX

    Nissan LEAF24 & LEAF30
    Does anyone out there own this car? I was just watching that episode of Top Gear on Dave. Jessa predicted that it's battery would be dead in 3 to 5 years. Would be interesting to hear if it was still around and what it's SOH is.
  10. Rumours of a increase in battery size in late 2018

    BMW i3
    Rumours of an increase in battery size in the late 2018 to 43.2 kwh https://cleantechnica.com/2017/10/10/bmw-i3-get-43-2-kwh-battery-pack-late-2018-rumor/ Would that increase get me away from the REX, I don't think so! It looks like it will still take a new battery technology to do that with a...
  11. Running on empty

    First Generation Ampera and Volt
    Been discussed on here before but - video attached of a Volt been run down to no battery , no petrol . no exactly a great experiment for actual additional range - he's shooting around in L & in sport mode& at one point is revving up to 72 Kwh power. he still manages 2 miles so the questions...
  12. Top up or big charge

    General Charging Discussion
    Hi There, I'm new to the world of EV's and new to this Forum, so forgive me if this isa question thats been asked previously, but... We have recently bought a Mitsubishi Outlander PHEV for my wife to use. She uses it mainly for school runs several times a day, supermarket visits, pick up and...
  13. Battery capacity units

    General EV Discussion
    BMW seem to quote their battery capacity in amp-hours e.g. 94Ah Every other manufacturer quotes in kWh. Why is this? Without knowing the nominal voltage of the battery pack, an amp-hour measurement is a useless comparison. Apparently, the i3 has a nominal voltage of 360V, which makes a 94Ah...
  14. So how much of a 90kWh battery is really available??

    Tesla Model S
    In a recent thread mgboyes raised the question as to what would happen if you drove a 90kWh battery car nonstop from full to zero as to what that might tell you about the true usable size of the 90kWh battery. So yesterday having a fairly long drive ahead of me I thought I would investigate. I...
  15. How can % go up on a drive?

    Tesla Model S
    Struggling to understand the rationale of how the battery percentage can go up at some point in a non stop drive (as shown on the trip graph) I can understand how the graph might flatten off, or the expected range increase when going from a 70 limit to a 30mph limit (which is this point in the...
  16. Plug in every night, or wait until the battery is empty?

    General Renault Z.E. Discussion
    Reading this post by @yoh-there here, I got to thinking that I have never found any definitive information with regard to charging lithium-based batteries. Are many small charges worse than one large charge? Which is more detrimental to battery life - the total amount of charges, or the total...
  17. Full Press Release on the new i3

    BMW i3
    The BMW i3 is the world’s first premium car designed from the ground up to be powered by an electric drive system. The result is a vehicle that embodies BMW’s commitment to driving pleasure without compromise. Since the launch in November 2013 the BMW i3 has gone from strength to strength...
  18. Model 3 battery size/options

    Tesla Model 3
    So, I've been doing some quick figures on the Model 3 and the likely battery pack size on the base spec. The Model S: 275 miles / 70kWh 3.93 miles / kWh The Model 3: 215 mile range 54.7kWh (at the same efficiency as the Model S) It's smaller, lighter and has a better drag coefficient. Could...
  19. Charging on CHAdeMO

    Tesla Model S
    Perhaps it is just me - but I got so used to looking at this Supercharger rate chart for filling up that I missed the fact that CHAdeMO charging has a totally different profile. It is almost completely linear until you hit 85% full when the time per % starts to increase significantly
  20. Wh/mi measurements on a 90

    Tesla Model S
    A few weeks ago on a windless day I went to the flat Fens & did some tests of Watt Hours / Mile Test was done up and down the road Ely/Cambridge which had no more than 10ft of altitude change over the part I was using. Hard to be sure that these scale up 100% accurately as the tests were...