nymea/libnymea/interfaces/smartmeterconsumer.json

{
    "description": "A smartmeterproducer can monitor total energy consumed by this thing.",
    "extends": "smartmeter",
    "states": [
        {
            "name": "totalEnergyConsumed",
            "type": "double",
            "unit": "KiloWattHour"
        }
    ]
}