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  1. Frustrations you have as an EV user

    New Member Introductions
    Hi there! Do you have frustrations as an EV user? If so, share your frustrations by completing this quick survey about "Frustrations you have as an EV user". The answers will be used to build software that solves these frustrations. The survey link is
  2. Electric car charging calculator

    New Member Introductions
    Hi, I'd like to share an EV charging calculator. It shows how much time and money it will take you to charge your electric vehicle. Use it if you plan to charge your EV at home, at work or at any AC charging point. The calculator is not applicable to DC...
  3. Free parking/charging at airports?

    All EV Conversions and Builds
    Hey guys, We are thinking of a startup that could lead to free parking for electric cars at airports! If you could fill in the 4 question survey liked to the post that would be great so that we could assess the demand. Also please feel free to comment as we would love to hear your opinion on...
  4. Semi-OT: Deep-cycle Lead Acid UPS Batteries for home power

    Batteries and Charging
    Hello all. I work in a data center, and we recently replaced our UPS systems. As part of this project, I was given the opportunity to take the old UPS/ATS system home. Unfortunately, the system was a 3-phase 480 volt system and there was no means of connecting it to my 220v home power. I did...
  5. LG Chem and Delta-Q QuiQ?

    Batteries and Charging
    I have previously purchased a Delta Q QuiQ Charger, and I am now in the market for some lithium packs. I was looking at the LG Chem batteries, which have a nominal voltage of 60.8v and have a 45Ah capacity, so about 2.6kW. The QuiQ charger is a 72v designed for lead acid, but the chemistry can...
  6. A123 module charging question

    Batteries and Charging
    Hey everyone! I am currently working on a conversion and spotted these packs for sale on eBay. Now I know the dollar per kilowatt isn't that great on these, but I am trying to keep the costs low, so I plan to start out with a few of these for a proof of concept and then upgrade down the road...
  7. Making custom battery charge circuits for your electric vehicle

    Technical Discussion
    The alternators of the hybrid drive train I'm making will be using a voltage and amperage that is not very common (48V @ 145-155 A). As a result, it is difficult to find a charger which I can use in this system (since most chargers are meant to be powered from the electricity grid (so 230V or...
  8. Charging Tesla Modules

    Batteries and Charging
    Hi everyone, I recently purchased a 444cell Tesla Battery Module (~5KWhr). Might anyone recommend which charger to get (that plugs into US 120VAC wall socket)? If you have experience in charging these battery modules, what's the time it'll take to charge the battery given the amp output from...
  9. Need info on EV Design

    All EV Conversions and Builds
    So im new to this whole EV idea but I've been interested in he idea of finding an alternative source of energy for some time. So I was wondering if anyone could give me a diagram or some type of detailed chart showing how a electric vehicle ignition and charging system works. I just want to get...
  10. DIY Rapid Charging?

    Batteries and Charging
    Hi All, For our Kickstarter project ( Our next van will have rapid charging capabilities built in. I've had a quick look around but can't find a simple answer. I know I can buy a Mennekes socket but the company are...
  11. Battery Charging: Help!!

    Batteries and Charging
    Hey everyone, Here is my story, and my situation. (I will keep this part short) I have been working on converting a 1985 pontiac fiero for 9 years. 9 YEARS!! I know that is a long time but I wasn't going to give up. I actually ended up restoring the fiero because the further I dug, the more I...
  12. Charging Plugs for electric cars - Type 1,Type 1, Type 1 to Type 2

    Parts Vendors
    Hi, we are company which sale charging plugs for all electric cars. EVSE is inside of connector. Our charging plug have possibility of selected an ampers from 6A to 16A with 16A cable and 6A to 32A with 32A cable. More informations is on my website If you have any questions...
  13. EV Research

    New Member Introductions
    Hi, I'm part of a group of postgraduate business students from Dublin City University conducting important research for our final assignment on electric vehicle use. The following survey will only take 3 minutes to complete and we would be extremely grateful for your input. We are looking for...
  14. Help Georgia Tech students gather data

    EV News
    Hello! A group of Georgia Tech students is researching EVSE charging equiptment for commercial spaces and trying to put together solutions for work place charging. Please take our survey and help us out! Thank you.
  15. Budget charger for 96V lithium

    Batteries and Charging
    Hi all, I'm doing a complete rebuild on a different Geo Metro using most of the same components (6.7" ADC, 1231c, pb-6), but moving to lithium batteries. I was using individual Soneil chargers for my 96v lead acid pack but obviously that won't be an option. Here's what I'm getting at...
  16. Max Charging Amps

    Batteries and Charging
    I'm trying to do the math of what size of a charger I should purchase. The battery specs say they can recharge at 1.5C when fast charging. I will be recharging at Level 2 EVSEs and Level 1 EVSEs. However, I would like to know how fast it will recharge because if it can recharge in under 3...
  17. does a BMS need a central brain?

    Batteries and Charging
    Would it be possible to just have a bleeder system for each cell independent? (a single wire with a micro circuit board to control flow/read voltage) and what are the issues with that? I thought it would provide the basic safety against a single cell overcharge when pack voltage is still lower...
  18. Charging Circuit Help Please!

    Electric Bikes
    Hi. I am building an electric scooter, which is powered by 4 6volt, 4.5amp rechargeable lead acid DC batteries (, wired in series to produce 24volts (18amps). I am planning to use an inbuilt charging circuit, which plugs into mains power (240v...
  19. Charging Circuit Help

    Batteries and Charging
    Hi. I am building an electric scooter, which is powered by 4 6volt, 4.5amp rechargeable lead acid DC batteries (, wired in series to produce 24volts (18amps). I am planning to use an inbuilt charging circuit, which plugs into mains power (240v...
  20. Selecting a appropriate charger

    Batteries and Charging
    Hi, I am a bit confused regarding the selection of appropriate charger for the battery pack i have. I went through specifications of few chargers and came across 'Nominal DC Output Voltage', 'Maximum DC Output Voltage' etc. Here is a link for Delta-Q charger. What does it mean by Nominal DC...