A Million Meters That Talk to Each Other

Wirepas has reported that close to one million Polaris smart meters are now running on its RF mesh connectivity across Uttar Pradesh, a state where roughly 78 percent of the population lives in villages. The deployment is part of India's national smart metering effort, and Wirepas says its technology is now used in more than 11 million smart meters across the country under deployments associated with the Revamped Distribution Sector Scheme. The platform complies with DLMS and IS 15959, and connects onward through standardised APIs.

The architectural point is why mesh rather than cellular, and it is a question worth understanding outside India. In a dense metering deployment every meter is a potential relay, so devices reach the head end through each other rather than each holding its own cellular connection. That removes a per-device subscription, removes the dependence on a mobile operator's coverage at the exact point where a meter happens to be bolted, and — most usefully in rural distribution — makes the network stronger as it gets denser rather than weaker. A cellular deployment gets harder at the margins; a mesh deployment gets easier in the middle.

The trade is equally real. A mesh needs density to work, so the first meters installed in a sparse area have no neighbours and the rollout sequence matters in a way it does not with cellular. Routing adds latency and makes individual device diagnosis harder, because a meter that stops reporting may be dead, may be out of range, or may have lost the neighbour it was relaying through. And the gateway backhaul becomes a concentrated dependency: one failed collector takes out everything behind it, which is a different failure shape from losing one cellular meter.

The number that deserves attention is the 11 million, not the one million. At that scale the questions stop being about radio performance and become about operations: how firmware is updated across a mesh without partitioning it, how a meter is commissioned by a technician who has no network yet, how billing data is reconciled when a device was unreachable for a day, and how many years the DLMS profile will survive. Utilities elsewhere planning AMI rollouts in the hundreds of thousands should read deployments at this scale as the honest evidence about what mesh costs and what it saves — the technology question was settled some time ago, and the operational one is where the programmes actually succeed or fail.