DRMZ developed a cost-effective 6LoWPAN smart meter retrofit for BSES Rajdhani's diverse meter network. Retrofitting to DLMS protocol, it enables data consolidation. Each module connects up to 50 meters, minimizing network charges. Expected savings over 5 years per retrofit: Rs. 7791. Potential total savings: Rs. 467 Crore in 25% network rollout.