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USA: Volt Owners: Here’s Why Your Delayed Charging Failed

We have greatly enjoyed our 2011 Chevrolet Volt range-extended electric car since its delivery early in January 2011, and it has seen much more use than the Nissan Leaf battery electric car that arrived about a month later.

However, 15 to 20 percent of the time we’ve connected our Volt to the Coulomb 240-Volt wall charging station to charge itself late at night using the delayed-charge setting, we would find that it had failed to charge when we came out in the next morning.

At first, I thought the problem was some kind of mistake on my part concerning how I inserted the charging handle. But we also used the Coulomb charging station with our Nissan Leaf, and we never experienced a charging failure with that car.

After more than a year of frustration, I concluded that the problem was between the Volt and the wall unit.

About two weeks ago, I had the Volt fully checked out by my local servicing dealer (Hanlee’s Chevrolet in Davis, California), which found no faults recorded in the Volt’s black box.

So now it seemed that the problem was located in the wall charger, so I sent in a problem report to the Coulomb website.

This is the response I received:

Working cooperatively with GM, Coulomb’s engineering team has identified the root cause based upon extensive testing in our lab with a Volt charging system and successful testing in the field with Volt customers using Coulomb charging stations.


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