From 73cf170e18ff05c8897096665ca76d6c008a646c Mon Sep 17 00:00:00 2001 From: Ben Roberts Date: Mon, 31 Aug 2020 11:57:38 +0100 Subject: [PATCH] Handle unit conversion for SMETS2 gas meters SMETS2 gas meter consumption is measured in m3 rather than kWh, so conversion from one unit to the other is required. Algorithm and description of terms is taken from: https://www.theenergyshop.com/guides/how-to-convert-gas-units-to-kwh This commit adds additional config file options to the `gas` section: - `meter_type` (default `1` for backward compatibility) Enables unit conversion from m3 to kWh before reporting metrics to influxdb - `volume_correction_factor` (default `1.02264`) - `calorific_value` (default `40`) --- app/octopus_to_influxdb.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/app/octopus_to_influxdb.py b/app/octopus_to_influxdb.py index 1cead72..a496847 100644 --- a/app/octopus_to_influxdb.py +++ b/app/octopus_to_influxdb.py @@ -71,6 +71,9 @@ def store_series(connection, series, metrics, rate_data): def fields_for_measurement(measurement): consumption = measurement['consumption'] + conversion_factor = rate_data.get('conversion_factor', None) + if conversion_factor: + consumption *= conversion_factor rate = active_rate_field(measurement) rate_cost = rate_data[rate] cost = consumption * rate_cost @@ -149,6 +152,9 @@ def cmd(config_file, from_date, to_date): g_mpan = config.get('gas', 'mpan', fallback=None) g_serial = config.get('gas', 'serial_number', fallback=None) + g_meter_type = config.get('gas', 'meter_type', fallback=1) + g_vcf = config.get('gas', 'volume_correction_factor', fallback=1.02264) + g_cv = config.get('gas', 'calorific_value', fallback=40) if not g_mpan or not g_serial: raise click.ClickException('No gas meter identifiers') g_url = 'https://api.octopus.energy/v1/gas-meter-points/' \ @@ -184,6 +190,8 @@ def cmd(config_file, from_date, to_date): 'gas', 'standing_charge', fallback=0.0 ), 'unit_rate': config.getfloat('gas', 'unit_rate', fallback=0.0), + # SMETS1 meters report kWh, SMET2 report m^3 and need converting to kWh first + 'conversion_factor': (g_vcf * g_cv) / 3.6 if int(g_meter_type) > 1 else None, } }