Waaree Energies shares plunge 6% despite 79% jump in Q1 revenue - What's the big worry for this renewable play?

Waaree Energies shares fell 6% today despite a 79% jump in Q1 revenue. Investors got worried as rising raw material costs hit profit margins hard. The company said, "Revenue of Rs 79 billion includes a one-off revenue of Rs 350 crore representing a refund of reciprocal duties." Many remain cautious.