• Jerez Test

Renault confirms battery issue

ESPN Staff
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A media scrum gathers outside Renault Sport to question Remi Taffin © Getty Images

Renault Sport is confident it will be able to offer an overnight fix for the major issue it has been having with its Energy Recovery System batteries at the opening two days of the Jerez test.

Renault-powered cars have had very limited mileage so far this week, with just 38 laps completed between Red Bull, Toro Rosso and Caterham in two days. By contrast Mercedes completed 97 laps with its factory car in just one day on Tuesday and has been able to run for sustained periods of time.

Renault Sport says it has identified the main problem with the batteries and will be removing them in order to fix them overnight at the circuit.

"The fact is that obviously we are facing problems," Renault Sport head of track operations Remi Taffin said. "There are many problems we can see when we've got new cars and also on our side new power units. But for sure we know on our side that we had one problem that we have clearly identified and we wanted to fix it.

"We could not fix it for this morning so we decided to do as much as we could on our side so that tomorrow, and especially for Red Bull and Toro Rosso to be sure, we can take to the track at 9:00. We are confident tomorrow morning we will have all three cars on the track."

However, Taffin stressed that, although the battery issue was the main one, there are other problems to fix on each individual car.

"A power unit is made of several sub-components and it's not a matter of any one not working," he explained. "It's clearly a problem of integrating all these systems, and in particular for this problem we had to fix the problem through the energy store [battery]. We are not going to go into the nature of the architecture of our system, but we have clearly identified something that we would have to change.

"We have got the parts, we have got the people here and the means to do this and we are prepared to do this. We did not want to do this when we came here but that's what happened. We are doing it, it's taking time and unfortunately it's a bit of high technology, especially when you look at the energy store. It's something we have to do carefully, which we are doing, but we are pretty sure tomorrow morning we will be fine."

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