Antonio Felix da Costa says DS Techeetah gave him 'either incomplete or wrong information' about his battery temperature, which he feels cost him a potential Formula E victory in Santiago.
Da Costa had risen from 10th on the grid to lead on lap 37 of 40 after a robust overtake on his BMW Andretti replacement Maximillian Guenther, only to be repassed with just three corners to go.
He eventually crossed the line more than two seconds adrift of first time FE winner Guenther after reaching a critical battery temperature aboard his E-TENSE FE20 in the dying moments of a scorching race in the Chilean capital.
In the post-race press conference, da Costa suggested that the battery-temperature issue was a sudden surprise owing to misinformation over team radio.
"I think I was being fed either not the complete or slightly wrong information because I was being told I was good on temperatures, even though I was saying, 'I don't think I am'," said da Costa.
"And yet, the moment I got the lead, they tell me, 'OK, you have to slow down'.
"It all came down to the last lap, but these guys [BMW] just managed it better."
Da Costa explained his sudden slowing down further to Autosport, saying: "Energy [levels] were good.
"I could have gone like almost flat out in those last three corners... I was catching [Guenther], I could have carried on that pace, which was amazing.
"In the end, it all came down to [battery] temperature.
"I think the car kind of switches off completely at 72.6C and with two corners to go it was 72.5C. "I said, 'OK, no, it's not going to happen'.
"I had to basically just back off a lot and make sure I arrived.
"Obviously, it hurts when you have a sniff of the win like that, especially coming from the back."
The O'Higgins Park race was only da Costa's third with the DS Techeetah team, and he reckoned that had probably contributed to the miscommunication.
"It's a new crew put together," da Costa said. "I'm learning them, they're learning me and maybe I misunderstood or whatever.
"But yeah, with one lap to react, it's way too late."
DS Techeetah team principal Mark Preston explained the cause of the rise in battery temperature, telling Autosport: "It's a balance of using different pedals and regen and things like that.
"So when [da Costa] was attacking people you sort of generate more energy in the battery.
"It was just a normal thing. We had everything planned but things didn't quite go to the plan."
Asked if the battery temperature rise had denied da Costa victory, Preston added: "You could say probably, but we're still discussing what the actual chain of events were.
"We're going to have to go back and actually run it through on the simulator and look at actually what options we would have, could have and should have done in order to maintain it."
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