Bharat Heavy Electricals Limited (BHEL) has floated a tender for 18,000 monocrystalline passivated emitter and rear cell (PERC) solar cells. The cells must be 158.75 ×158.75 ± 0.5 mm in dimensions and 220 microns thick ± 20 microns. BHEL specified multiple wattages for the cells ranging between 5.7W and 5.22W. They must be five bus bars in length.