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Maintanence

Maintenance costs on electric cars are 33 to 55% less than gas cars

Posted on:
Thursday, July 4th, 2013
Author:
Ken

Electric cars are much easier and therefore less costly to maintain compared to the internal combustion engine (ICE) cars. According to this article on Green Car Reports, it is 33% cheaper to maintain electric cars than gas cars.     Here’s a comparison of the maintenance costs between my 2009 Toyota Corolla (gas car) and [...]

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How I maintain the LiFePO4 battery cells on a monthly basis.

Posted on:
Sunday, March 17th, 2013
Author:
Ken

Key things to remember: 1. DO NOT keep the cell log 8s connected permanently (even if switched off), each pin will draw different amps from the cells.  Some random sampling suggested a range of 2 mA to 790mA.  This doesn’t seem like much draw, but over time, it will eventually cause your pack to go out [...]

Posted in Batteries, Maintanence, MR2EV | No Comments »

Better range with low rolling resistance tires?

Posted on:
Friday, December 14th, 2012
Author:
Ken

I have been a cheap skate and trying to extend the life of the old tires (9 years) on the MR2 to get as much use out of them as possible. It recently started raining in California, and the car has hydroplaned a couple of times already, yet I stil haven’t taken the time to [...]

Posted in Efficiency, Low Rolling Resistance, Maintanence, Tires | 2 Comments »

Charger Repaired and back on the road!

Posted on:
Thursday, October 11th, 2012
Author:
Ken

Manzanita Micro has fixed the charger and I’ve charged for a couple of nights without issue at about 40amps out. I get about 140ah on my 144V pack in less than 4 hours on 220V AC. It is nice to be back on the road again, especially with the recent gas price spike from 4.20 [...]

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Battery maintenance and donating gas savings follow-up.

Posted on:
Sunday, July 15th, 2012
Author:
Ken

Well, the consensus from polling other fellow EVer’s is that the loosening of the battery terminals is expected by should go away with time. It makes sense that as we torque the bolts on the terminals they will compress. Compression deformations that becomes permanent (rather than acting as a spring) will loosen the terminals over [...]

Posted in Batteries, EV Club, Maintanence, MR2EV | No Comments »

10,000 mile, 1 year maintenance

Posted on:
Tuesday, July 10th, 2012
Author:
Ken

I just spent 2 hours doing some maintenance on the MR2. Here’s my list: 1. Check tire pressure. OK at 45psi 2. Check all high current connections including battery terminals and NEMA connections * 3. Check all bolts: Racks (found some loose ones!!), CV drive shaft (all looks good here after that last accident!). 4. [...]

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Range Test

Posted on:
Monday, July 4th, 2011
Author:
Ken

So I charged the LiFePO4 cells to 3.4 volts each for a full charge and tested range this weekend. After 82 miles (freeway/local roads – top speed 80 mph on flat), the cells were averaging 3.14 volts each at rest. The battery manual from the manufacturer suggested that at 3.1V the batteries would have been [...]

Posted in Batteries, Maintanence, MR2EV, Range | No Comments »