More Tools (i.e. toys.)

Porsche 914 EV Conversion

Maybe I'll take a day off to go to A & P as well as Farwest Golf Carts to pick up some old 8V golf cart batteries for desulfation testing I've been mulling over some ideas for the past few days.

Batteries are Here!

Porsche 914 EV Conversion

After much time on the phone with UPS Freight, the 8-volt golf cart batteries finally showed up today! Although the Bill of Lading clearly stated that this was a residence requiring a liftgate, UPS seemed to overlook that part of the order.

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Battery Equalizer Schematics Rev 1.0

Porsche 914 EV Conversion

I'll have to modify the circuit with a voltage doubler in the final stage to work with 8-volt golf-cart batteries for the 914 EV kit.

Hauling Lead and Confusing Connections

Porsche 914 EV Conversion

These high-capacity 8-volt golf-cart batteries are 70 pounds apiece. I got this battery strap at a Yamaha golf cart dealer. Tonight was an evening of heavy lifting. I'll definitely take some ibuprofen before tomorrow. Here are the batteries in the front box.

The Great Desulfation Experiment

Porsche 914 EV Conversion

Above is a picture of a heavily sulfated 8-volt golf-cart battery I acquired yesterday. Can one revive a mostly dead battery? Several internet sources say yes. It had a floating voltage of 7.85 when I got it and needed half a gallon of distilled water to fill it back up.

Don't let those batteries just sit around

Porsche 914 EV Conversion

The 8-volt golf cart batteries arrived over 24 days ago and have just been sitting on the garage floor, discharging. I'm a bit wiped from the initial burst of installing all the battery racks, so I took it a bit easier on Friday and Saturday to do some of the smaller installation steps.

Measuring State-of-Charge on Lead Acid Batteries

Porsche 914 EV Conversion

The 914 AC kit uses 8V golf cart batteries and I'm wondering if different batteries like Hawkers or Optima Yellow-Top batteries would be better. After researching different battery types, it looks like the Hawkers and Optimas can put out more amps for more torque and are more rugged, but the golf-cart batteries still rule in terms of capacity per weight and size. Both US-Battery and Trojan have 8-volt golf-cart batteries.


Porsche 914 EV Conversion

I should be getting the 18 8-volt golf-cart batteries from American Battery Company early next week. As you may have noticed, the blog entries have dropped off rather abruptly in recent weeks. I've sent three e-mails and one phone call to Electro Automotive asking about the status of the battery racks/boxes and received no reply. As you might imagine, I'm a bit frustrated with this and don't really know what to do next.

Test Drive to Work

Porsche 914 EV Conversion

I'm not sure how much current these golf cart batteries are designed for. Since traffic is really light on Sunday morning, I drove to work (15 miles away) and back to see how the 914 would handle. Shifting was a real pain on city streets since the electric motor changes RPM very quickly during acceleration or regeneration. The RPM stays constant when I "coast" unlike a gasoline engine which tends to slowly drift back to "idle."

Talking with Mike at ElectroAuto

Porsche 914 EV Conversion

Regarding the 8V golf-cart batteries, Mike also mentioned that they tended to either last 3-4 years or die right away (infant mortality). I just got off the phone with Mike at Electro Automotive. We chatted about the blown CCPower DC-DC converter and the engine vibrations. Since I fixed the DC-DC converter, we agreed that I would try to find out which conditions would cause it to blow again, if it does. It seems that Mike is more of a mechanical person than an electronics person.

More Delays

Porsche 914 EV Conversion

Besides, the PowerCheq units only handle 12 volt batteries and the ElectroAuto kit is designed for 8-volt golf-cart batteries, so a homebrew system will be required. Over the past few weeks I've been trying to contact the folks at Electro Automotive to get the status of the EV 914 kit. They finally responded last night and apparently they're completely buried under the demand for EV conversion kits.

EV Briefs, and Black Rock City & EVs

Plugs and Cars

Out in the desert as part of Burning Man , our encampment, Snow Koan Solar, is setting up a solar photovoltaic EV Charging Station (at 7:30 and Desert) for electric scooters, golf carts, sofas and barstools. A few items before I head out to Black Rock City for two weeks. We'll also be taking Burning Man art projects off petroleum generators by switching them to solar electricity.

ZENN Motor Increases Stake in EEStor to 10.7%; EESU Production Prototype Promised by End of 2009

Green Car Congress

These investors had also elected not to participate at the time of ZMC’s initial EEStor investment in April 2007. Under its Technology Agreement with EEStor, ZMC holds the worldwide exclusive rights to incorporate EEStor’s energy storage technology (EESU) for new passenger vehicles up to 1,400 kilograms curb weight (net of batteries); golf carts, Low Speed Vehicles and certain utility vehicles; and the conversion of any class of used internal combustion 4-wheel vehicles to electric.

Electric Car Manufacturers Inspire New Paradigms -- Seeking Alpha

Tony Karrer Delicious EVdriven

They are either glorified golf cart city cars like this one or they are only for the very wealthy like the Tesla. Apr 25 01:04 PM | Link | Reply HerrHansa 12 Comments A golf cart with a nice body, for more than the price of a decked out Mini.

Electric Car Makers: Oregon Wants You - Green Inc. Blog -

Tony Karrer Delicious EVdriven

Home Page Todays Paper Video Most Popular Times Topics Search All Energy & Environment World U.S.

GM Says Chevrolet Volt Won't 'Pay the Rent' | Autopia from

Tony Karrer Delicious EVdriven

You guys go ahead and buy your 40 mile per charge GM golf cart. Wired Home Subscribe Sections Cars 2.0