After some testing, instead of trying to support the Backup Interface, which is likely to never happen. I found some existing values that represent off-grid mode and would be ideal to add this in.
basically, if you have a BUI and are in off-grid mode, the voltage_ln goes to a negative value of -32768
during this time, the meter data itself report power, l1_power, l2_power, l3_power, l1_power_factor, l3_power_factor, l3_power_factor all report the same -32768 value. in my code that processes the data, it reverses the values for power, l1_power, l2_power, l3_power (i.e positive means importing and exporting is negative)
power_factor during this time just reports 0
what this means is, during an off-grid event based on the values above, if you're using the meter data to calculate consumption, then it will add in 32768watts to your consumption, which is incorrect. so during off-grid events, the meter power values need to be hard set to 0 if the voltage_ln is below 0. I've attached images of my consumption before I realised this (I am on three phase, Australia)
hopefully this helps out someone else in the future.
After some testing, instead of trying to support the Backup Interface, which is likely to never happen. I found some existing values that represent off-grid mode and would be ideal to add this in.
basically, if you have a BUI and are in off-grid mode, the
voltage_lngoes to a negative value of-32768during this time, the meter data itself report
power,l1_power,l2_power,l3_power,l1_power_factor,l3_power_factor,l3_power_factorall report the same-32768value. in my code that processes the data, it reverses the values forpower,l1_power,l2_power,l3_power(i.e positive means importing and exporting is negative)power_factorduring this time just reports0what this means is, during an off-grid event based on the values above, if you're using the meter data to calculate consumption, then it will add in 32768watts to your consumption, which is incorrect. so during off-grid events, the meter power values need to be hard set to 0 if the
voltage_lnis below 0. I've attached images of my consumption before I realised this (I am on three phase, Australia)hopefully this helps out someone else in the future.