Tips & tricks


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Before Tesla precise calculations on SoC and charging time, we had Nissan Leaf and other EV's "Guessometer" I spent some time using my degree in Physics and almost a quoter of milion EV miles on 3 owned EV-s sence 1997. I got more precise time of charging that is realy close to Tesla time. My time calculator works for my Tesla too. A rough time estimate for a full charge on an empty battery using the J1772 charger: (74kWh-4kW)/7.7kW=~9 hours. Assuming your EV has a 74kWh battery pack with just 4kWh of Energy (E) left in your pack and it acepts 7.7kW max.
The formula is estimate formula because your EV charged with maxed power only till 90% SoC (State of Charge) and after it drops to few kW. So I avareged the charging power according the voltage and the voltage drop under load. An EV dashboard shows bars, percentage or miles.


You should know 2 things about your EV before to buy a home or mobile charger for it:
1. What is maximum current (or power=current*240V) your EV can accept/charge? Usually, it is 32A or 240VAC*32A=7.68kW ~ 7.7kW of the max charging power. Tesla S can accept up to 80A. If your EV accepts 32A max than you should buy a 40A Charger for it. See the list of the best chargers
2. If you plan to charge more frequently out of your apartment than you should buy a mobile charger. If you have a house (or a garage) than buy a stationary charger that will save you money: your EV's battery pack will live longer because you do less fast charging and you have cheaper electricity at home than it cost to charge your EV at public charger (it maybe 2 times the difference). If you have solar panels than it is FREE charge, for your EV!
To charge your EV:
1. @Home: use (240VAC*30A=7.2kW) dryer outlet (overnight charge) or regular wall outlet (slowest charge). You need an adapter: from your dryer outlet to your EV charger plug, that will cost for you about $30-$50 depends from the cable length
2. On trip:
a. Public EV chargers, samaritans electrical outlets or common NEMA 14-50 (240VAC*50A=12kW) RV parking outlet. You should download an app (eg. PlugShare) to your mobile phone to find those.
b. Use a small electrical generator or Solar Panels with micro-inverter.
c. Use well-known apps to locate public chargers: PlugShare, Open Charge, alternative Fuels Data Center or Tesla.com/supercharger web-page
3. In an emergency situation: "The only electrician" can connect you to the electrical pole wires using especial hooks-connectors or You can tow your car in drive gear mode with LOW SPEED using strong enough especial cable. Some manufactures do not recommend tow-charge an EV. It is the same physical process of an EV power regeneration as you driving a downhill that is under on-board computer control but in most cases the tow-charging somehow out of the control of your EV computer and almost all manufacturers do NOT recommend it! Youtube has few clips of "speed-controlled-tow-charging-success-Tesla-Model-3" with no more than 20mph!! The towing charge is approx 1kWh/mile. If your EV has a 70kWh pack than you need approx 70 miles or 3.5 hours to fully charge your battery.

Any traction battery pack manufacterer recomends to fast charge the battery to 80% and drive. Even with slow overnight charge a manufacturer does not recomend to charge it to 100% moreover, if you will not travel a long distance next morning. A fast charge to 80% prevents your battery pack to overheat and be more healthy. It is not good for the pack health to pump electrons 'to fast' using a fast charger. An EV on-board computer stops to charge it at 80% or sometime little bit earlier according of the battery temperature and other conditions to make your batteries livespan longer.

Longer life conditions for your battery:
  1. Do not discharge below 10%, below 1%-3% could be a deadly for some batteries.
  2. Do not overcharge above 80%-90%
  3. Temperature range should be: from 40°F to 113°F (5° - 45°C)
  4. Charge as slow as possible. Overnight charging is preferable over fast charging. If you travel -- find a hotel with or near a Level 2 public (Destination) charger to charge your EV overnight
  5. Discharge to 0% may kill some packs instantly. Charge to 100% count as the complete cycle and some modern packs have 1,000-5,000 full cycles life limit depends from chemistry and manufacturer. Sometime Tesla protects it's batteries by reducing real energy pack value on some EVs as we learned from the hurricane news 2017 in Florida. Nothing wrong with this picture: if customer/driver paid for 80KWh and Tesla gifted/unlocked to stressed drivers 85KWh moreover, in the emergency citation. May be only Tesla sacrifices it's own profit for the quality and the battery pack longer life because Tesla driver paid for 80kWh but surprisingly got 85kWh. Tesla's Model 3 2018, battery pack costs $190 per kWh, and General Motor's 2017 Chevrolet Bolt battery pack is estimated to cost about $205 per kWh.

No, because it is not just a simple wiring adapter like a Tesla to J1772. Communications protocols are different for those fast chargers and you need a real-time protocol translator based on a good processor (as a computer processor). FYI: Tesla Corp. has created Tesla to CHAdeMO adapter (~$450) with processor and software inside.
An electrician can make for 20 minutes any wired adapter that will connect eg. your dryer outlet to your charger (EVSE) plug. CCS is the only competitor to the Tesla Supercharger. Tesla made the CHAdeMO adapter to promote the fast charger and fight the main CSS competitor. To make the adapter it is making real-time protocol translator. Eg. an Arduino with a 'proprietary translator software' can do it. It is much easy to translate CCS J1772 protocol to Tesla then CCS because a Tesla charging protocol based on J1772 protocol, that why you can charge a Tesla from any public J1772 charger just using a simple adapter with few wires inside, provided by Tesla with any Tesla car.

  • Model: In 1828, Ányos Jedlik, a Hungarian who invented an early prototype of an electric motor, created a small 'car-model' powered by his new motor
  • Practical Model: The first known 'practical' electric car was built in 1837 by chemist Robert Davidson of Aberdeen, England
  • Production EV: English inventor Thomas Parker, who was responsible for innovations such as electrifying the London Underground, overhead tramways in Liverpool and Birmingham, and the smokeless fuel, built the first 'production' electric car in London in 1884
  • EV Taxi in New York (at the end of 18 century) had been sabotaged by Oil Magnates The smart destruction of the EV Taxi based on a mixing of 'property types'. After the EV success and threat to lose oil money, magnates evil step was: "The charging is too long, let's build a battery pack 'public' swaping stations" The built Public Statins (for a 'private' battery packs) created chaos, many disputes, and the end of the EV Taxi. Like we have similar History lessons of our Civilization: Communism (called Utopia by its creator) ended almost all countries this try to implement a different flavor of it. One of the Communistic principles to insert the 'Major Public Property' to the private property domain but the domain is a native to any human. A toddler without any judgment or understanding says: "It is MY toy".
  • Out of our Planet: There is no place for ICE cars because of the absence of O2. The three EV rovers are exploring Mars. Few EVs are currently parked on the moon. Tesla Roadster would be captured by Martian colony in the future. Now it is in the orbit between Earth and Mars. Also, NASA prepared many EV-rovers for future exploration.
  • Highway-capable most remarkable production EV-s in modern history:
    1. GM EV1 1996 - vandalized by its creator! See the documentary: "Who kills electric car". Lowest drag coefficient in history of any production cars--0.19
    2. Nissan Leaf 2011 - First reliable EV with almost 100 miles on a highway
    3. BMW i3 2013 with ReX - 'SERIAL' Hybrid real success story, but has a bicycle tires
    4. Tesla S 2012 - best of the best, but expensive
    5. Tesla model 3 2017 - Best affordable EV -- the beginning of the end of all non-efficient ICE polluters.

Yes, only one time on mount road uphill driving my Leaf. During the last decade I drow my Nissan Leaf, Tesla Model 3, and Toyota RAF 4 with NiCd batteries. I did not make my destination just a mile short.
"Usually, people who stuck w/o gasoline - stuck w/o electric energy!"

Do not drive from 100% to 0% and measure the driven distance. It is dangerous for your battery!
Ask your manufacturer to measure the degradation if you have some doubts and you are not a technical person.
Here are excellent links to follow
Few labs in 2019 tested a modern Li-ion cell for 1 million miles with degradation approx 50%. Even in a Mercedes ICE car 'everything' has been replaced after a half-million mile and it's frame and body only may drive to 1 million. Some Electric motors work 24x7 a 100 years on water pumping station replacing bearings and brushes. All modern electric motors are brush-less, have composite bearings forever and lifetime warranty. EV traction pack usually has 50-75 k-miles warranty of 20-30% degradation. For more explicit info on a battery visit batteryUniversity.com

Yes, any EV can charge from any Tesla Destination Charger using the simple (4 wires) JDapter because Tesla uses J1772 charging protocol on any Tesla's L2 AC 1 phase chargers. L2 chargers include Tesla's Home (Wall Connector) and mobile chargers (Mobile Connector). JDapter does not fit to 3 phase Tesla Destination charger in Europe.
The answer is NO for L3 DC Superchargers!! even JDapter fits

It does not convert the voltage, but it controls the current accordingly and protects you. The EVSE has a computer inside that runs safety J1772 protocol. It is responsible for your safety and your EV safety. Eg: You can start to charge your EV with 240VAC while you standing in water in heavy shower and wind, you are 100% wet! You should not have any fear to be electrocuted while you are wet and you see green safety light is on at any public charger. Also, it never overcharges your EV batteries and it increases and decreases amperage according to your EV onboard computer requirements and temperature measurements. You can charge your EV anywhere on earth on any public chargers with J1772 plug. Modern level 3 public charger has 900VDC dangerous voltage that may instantly ash any wet human if it would run w/o the safety protocol. The safety protocol is checking first - ground, second what did you connect to it and also other things and only after it is recognized the EV and all necessary specification, it turns on itself. If you disconnect a plug the EVSE dangerous voltage turns off itself during one millisecond! It has the same protection principles as 120VAC household GFCI outlet mounted next to a water faucet.