The moment two parties share one electricity connection, someone needs honest numbers: rental equipment on a client's supply, tenant billing in shared buildings, irrigation districts where several farms draw from one pump, holiday homes where the caretaker's usage and the owner's usage need separating. Metering answers this — and a metering smart breaker answers it without a separate meter, without a second enclosure and without an extra pair of cables.
What a metering smart breaker measures
The SMR1 Wi-Fi metering RCBO measures voltage, current, active power and accumulated energy at class-1 accuracy (±1 %), logs hourly records for 12 months, and switches the circuit remotely from the app. One DIN module does the protection job of a breaker, the billing job of an energy meter and the control job of a remote switch. The hourly log is what disputes get settled with: not "the pump ran a lot", but 214 hours in March, exported as data.
Irrigation districts and shared pumps
In a shared-pump arrangement, each farm's shifts are scheduled in the app and every switching event is tied to the measured consumption of that window. The district operator holds admin rights; each farm sees its own schedule and consumption. This is the architecture behind the 600-hectare Chilean irrigation project in our case studies — metering turned an annual argument about water-and-power shares into a monthly data export.
Rental and construction equipment
Equipment rented with power included is a classic leakage: the rental rate assumes a duty cycle, reality differs, and there is no basis to reconcile. A metering breaker on the rental's feed circuit measures actual consumption per contract period. Combined with a 4G switch it also enforces contract boundaries — the equipment simply cannot run outside the rental window without the office switching it on.
Tenant and holiday-home billing
For sub-metering a holiday home or a market stall, the metering breaker sits on that tenant's circuit inside the main board; the tenant's app shows only their own circuit. Where the board has no spare module, the AT-SY1 DIN-rail Wi-Fi switch covers the control side and a conventional sub-meter the billing side — the metering breaker simply does both in one module when a slot is available.
Accuracy and legality
Class-1 metering (±1 %) is accurate enough for internal cost allocation and most commercial sub-billing. For billing that must comply with national utility metering law — resale of electricity to third parties in some jurisdictions — check the local rules: several markets require approved pattern meters for resale, and a metering breaker sits alongside rather than replaces those. For allocation between parties under a private agreement, which is the case in the large majority of rental and irrigation arrangements, class-1 is the accepted standard.
Describe your sharing arrangement — who switches, who pays, how often — and we will propose the metering and switching layout. Describe it here, or start from the breaker sizing guide if the circuit is new.